HomeMy WebLinkAbout1.00 General Application MaterialsNorth Hangs SUP
February 2022 1
MEMO: North Hangs Mine - Garfield County Special Use Permit Application
Component Guide
To facilitate Garfield County Community Development’s review of the North Hangs Mine Special
Use Permit application, Western Slope Materials (permittee) has assembled the following guide
rubric. This rubric is to show reviewers where they should find each item of the County Land
Development Code and each item identified in the Pre -Application addressed in the full application.
All components of the application narrative can be found within the SUP COMBINED PDF. Maps
and appendices are contained within their own PDFs. Clink the Section in Document labels to
open the applicable document location.
Garfield County LDC
Required Component
Document Section in Document
Professional Qualifications North Hangs LUC FINAL Professional Qualifications
Application Form North Hangs LUC FINAL Application Form
Ownership North Hangs LUC FINAL Ownership
Representative North Hangs LUC FINAL Application Form
Adjacent Property Owners North Hangs LUC FINAL Adjacent Property Owners
Mineral Rights ownership North Hangs LUC FINAL Adjacent Property Owners
Project Description North Hangs LUC FINAL Project Description
Copy of pre-application
summary
North Hangs LUC FINAL Copy of pre-application summary
Vicinity Map North Hangs LUC FINAL Vicinity Map
Site Plan North Hangs LUC Appendix 4 Appendix 4: Exhibit C (Map C-1)
Landscape Plan Not Applicable Landscape Plan
Grading and Drainage Plan North Hangs LUC FINAL
& Appendices 4 & 6
Grading & Drainage Plan; Appendix 4:
Exhibit C (Map C-2, C-3, C-4, F-1, F-2)
& F-2)Impact Analysis North Hangs LUC FINAL &
Appendices 2 & 3
Impact Analysis
Development
Agreement/Improvements
Agreement
Not Applicable Improvements Agreement
Traffic Study North Hangs LUC FINAL Traffic Study
Water Supply and Distribution
Plan
North Hangs LUC FINAL Water Supply/Distribution Plan
Wastewater Management and
System Plan
North Hangs LUC FINAL Wastewater Man./Treatment Plan
Floodplain Development Permit North Hangs LUC FINAL Floodplain Analysis
D Lewicki & Associates
EN GINEERIN G I GEOLOGY I ENVIRONMENTAL
D Lewick i Sf Associa t es
North Hangs LUC
February 2022 2
Response to standards fully
described in Article 7, Divisions
1, 2, and 3
North Hangs LUC FINAL Article 7 Standards
Response to standards fully
described in Section 7-1001 and
Section 7-1002
North Hangs LUC FINAL Section 7-1001 & 7-1002
SPCC Plan North Hangs :LUC Appendix 5
Additional Specific Topics from
Pre-App Meeting
Document Section in Document
Wetlands North Hangs LUC
FINAL & Appendix 7
LUC: Project Description
River Setbacks North Hangs LUC
FINAL Appendix 4
Appendix 4: Exhibits C, F, & G (Maps)
Noise and Visual Mitigation Standards North Hangs LUC
Appendix 1
Re-vegetation/Reclamation North Hangs LUC
FINAL & Appendix 4
SUP: Reclamation Plan; Appendix 4:
Exhibit E
Stormwater and Drainage Studies North Hangs LUC
Appendices 4 & 6
Appendix 4: Exhibit G
Irrigation Ditches North Hangs LUC
Appendix 4
Appendix 4: Exhibit C (Maps)
Regards,
Ben Langenfeld, P.E.
Lewicki & Associates, PLLC
(720) 842-5321, ex. 1
benl@lewicki.biz
Appendix 5
Appendix 1
D Lewicki & Associates
North Hangs Mine
Garfield County Land Use Change
Application
December 2021
Revised February 2022
By:
Western Slope Materials, Inc.
Represented by:
WESTERN SLOPE MATERIALS
A STEWART COMPAN Y
II
Lewicki & Associates
Contents
1. Introduction .................................................................................................................... 1
2. Professional Qualifications ............................................................................................. 9
3. Application Form ...........................................................................................................10
4. Ownership .....................................................................................................................11
5. Adjacent Property Owners and Mineral Owners and Lessees .......................................12
6. Fees ..............................................................................................................................13
7. Project Description ........................................................................................................14
8. Vicinity Map ...................................................................................................................24
9. Site Plan ........................................................................................................................25
10. Grading and Drainage Plan ...........................................................................................26
11. Reclamation Plan ..........................................................................................................29
12. Landscape Plan .............................................................................................................31
13. Impact Analysis .............................................................................................................32
14. Improvements Agreement .............................................................................................38
15. Traffic Study ..................................................................................................................39
16. Water Supply/Distribution Plan ......................................................................................40
17. Wastewater Man./Treatment Plan .................................................................................41
18. Floodplain Analysis........................................................................................................42
19. Article 7 Standards ........................................................................................................43
20. Section 7-1001 Industrial Uses ......................................................................................49
21. Section 7-1002 Gravel Extraction ..................................................................................51
22. Appendix 1 – Noise Analysis .........................................................................................91
23. Appendix 2 – Environmental Impact Analysis ................................................................92
24. Appendix 3 – Geologic Hazard Analysis ........................................................................93
25. Appendix 4 – CDRMS Application .................................................................................95
26. Appendix 5 – SPCC Plan...............................................................................................96
27. Appendix 6 – Stormwater Management Plan .................................................................97
28. Appendix 7 – Other Items ..............................................................................................98
North Hangs Mine
February 2022 1
Introduction
The North Hangs Mine is a proposed sand and gravel operation located approximately 1 mile
west southwest of Silt, CO located along the Colorado River just north of Interstate 70. The
operation will excavate, process, and send offsite construction materials from a 72.8 acre permit
and affected are. Access will be from the existing County Road 346 connection for the property.
The owner of the land is North Hangs Ranch LLC. The operator and permittee is Western
Slopes Materials LLC.
The current site condition is predominantly rangeland. The mined portion of The site will be
reclaimed to a groundwater lake and surrounding rangeland. Details of mining and reclamation
plans can be seen on the maps in Appendix 4.
The North Hangs Mine will operate as a new construction materials source for Western Slope
Materials as they wind down operations at their Grand River Park Pit. The Grand River Park Pit
is currently operating southeast of the North Hangs property, on the South side of I-70. With
North Hangs, Western Slope Materials will continue to serve the local construction market with
quality materials for years to come, without increasing impacts to the local environment or public
infrastructure.
1. Plans and Goals
Western Slope Materials is committed to beginning impact mitigation and minimization efforts as
soon as possible when all conditional approvals for this gravel mine are in place. By beginning
mitigation work several years before the commencement of mining, items such as landscaping,
specifically tree plantings and infilling, will be more mature and effective when mining begins.
With approval of this SUP, mitigation and other pre-mining activities will be able to move
forward, a benefit to both the operator and the community at large.
Western Slope Materials has developed mining and reclamation plans that will see the North
Hangs Mine operate with minimum impact on the surrounding community throughout its life.
These plans include phased mining, concurrent reclamation, wetlands development, screening
and berms, and operational best management practices.
The North Hangs Mine will operate in two main stages: mining and then a construction materials
recycling center that will accompany the reclaimed mining area. Each of the stages is shown in
the figures below. Mining will consist of excavating raw material to supply Western Slope
Materials needs in the local construction market. Recycling will allow the plants and
infrastructure onsite to continue to support the construction market in the region even after
mining is done, especially by facilitating the recycling of waste concrete and asphalt. The
recycling stage will see the site become a lake surrounded by wetland and riparian fields, much
of which will already have come into being during the previous stage. These stages can be
visualized in Figures 1 through 3.
II Lewicki & Associates
North Hangs Mine
February 2022 2
Figure 1. North Hangs Mine – Phase 1 Mining
II Lewicki & Associates
North Hangs Mine
February 2022 3
Figure 2. North Hangs Mine – Continuation of Mining Stage (Phase 1)
II Lewicki & Associates
North Hangs Mine
February 2022 4
Figure 3. North Hangs Mine – Continuation of Mining Stage (Phase 1)
II Lewicki & Associates
North Hangs Mine
February 2022 5
Figure 4. North Hangs Mine – Reclamation of Lake, Continuation of Recycling
II Lewicki & Associates
North Hangs Mine
February 2022 6
Figure 5. North Hangs Mine – Phase 2 Mining
II Lewicki & Associates
North Hangs Mine
February 2022 7
Figure 6. North Hangs Mine – Recycling & Reclaimed Stage
II Lewicki & Associates
North Hangs Mine
February 2022 8
Figure 7. North Hangs Mine – End of Reclaimed Stage
II Lewicki & Associates
North Hangs Mine
February 2022 9
Professional Qualifications
This report was produced by Ben Langenfeld (P.E.# 0047151), a Professional Engineer
registered in the State of Colorado.
II Lewicki & Associates
North Hangs Mine
February 2022 10
Application Form
The Garfield County ‘Land Use Change Permit Application Form’ is included in this application
package. The pre application summary is also attached.
II Lewicki & Associates
Community Development Department
108 8th Street, Suite 401
Glenwood Springs, CO 81601
(970) 945-8212
www.garfield-county.com
LAND USE CHANGE PERMIT
APPLICATION FORM
TYPE OF APPLICATION
Administrative Review Development in 100-Year Floodplain
Limited Impact Review Development in 100-Year Floodplain Variance
Major Impact Review Code Text Amendment
Amendments to an Approved LUCP
LIR MIR SUP
Rezoning
Zone District PUD PUD Amendment
Minor Temporary Housing Facility Administrative Interpretation
Vacation of a County Road/Public ROW Appeal of Administrative Interpretation
Location and Extent Review Areas and Activities of State Interest
Comprehensive Plan Amendment Accommodation Pursuant to Fair Housing Act
Pipeline Development Variance
Time Extension (also check type of original application)
INVOLVED PARTIES
Owner/Applicant
Name: ________________________________________________ Phone: (______)_________________
Mailing Address: ______________________________________________________________________
City: _______________________________________ State: _______ Zip Code: ____________________
E-mail:_______________________________________________________________________________
Representative (Authorization Required)
Name: ________________________________________________ Phone: (______)_________________
Mailing Address: ______________________________________________________________________
City: _______________________________________ State: _______ Zip Code: ____________________
E-mail:_______________________________________________________________________________
PROJECT NAME AND LOCATION
Project Name:
_____________________________________________________________________________________
Assessor’s Parcel Number: ___ ___ ___ ___ - ___ ___ ___ - ___ ___ - ___ ___ ___
Physical/Street Address: ________________________________________________________________
Legal Description: ______________________________________________________________________
_____________________________________________________________________________________
Zone District: ___________________________________ Property Size (acres): __________________
2179 092 00 106
cG Garfield County
PROJECT DESCRIPTI ON
Existing Use: MEADOW HAY LAND-AGRICL TRL -4137 (AGRICULTURAL PROPERTY)
Proposed Use (From Use Table 3-403): ..:·G::.r•=v•:_:10:::p::.:•r•::1
i
0
::::
0 ===================-
Description of Project: The operation will excavate, process , and send offsite constructi on materials.
For Appeal of Administrative Interpretation please include:
1. The Decision you are appealing.
2. The date the Decision was sent as specified in the notice (date mailed).
3. The nature of the decision and the specified ground for appeal. Please cite specific code sections
and/or relevant documentation to support your request.
4 . The appropriate appeal fee of $250.00.
5. Please note a completed Appeal Application and fees must be received within 30 calendar days
of the date of the final written Administrative Interpretation.
REQUEST FOR WAIVERS
Submission Requirements
□ The Applicant requesting a Waiver of Submission Requirem ents per Section 4-202. List :
Section: Sect ion :
Section: Section:
Waiver of Standards
□ The App lica nt is requesting a Wa ive r of Standards per Section 4 -118. Li st:
Sec tion: Sec tion:
Section: Section:
I have read the statements above and have provided the required attached information which is
correct and accurate to the best of my knowledge.
\~¢~
Signature of Property Owner or Authorized Representative, Title Date
OFFICIAL USE ONLY
File Number: ____ -___ _ Fee Paid :$ ____________ _
Garfield County
STATEMENT OF AUTHORITY
Pursuant to C.R.S. §38-30-172, the undersigned executes this Statement of Authority on behalf of
North Hangs Ranch LLC a Colorado limited liability company {corporation, limited
liability company, general partnership, registered limited liability partnership, registered limited liability
limited partnership, limited partnership association, government agency, trust or other), an entity other
than an individual, capable of holding title to real property {the "Entity"), and states as follows:
The name of the Entity is _N_o_rth_H_a_n_gs_R_a_n_ch_L_L_c _____________________ _,
and is formed under the laws of _C_o_lo_ra_do ______________________ _
The mailing address for the Entity is 950 Smile Way, York PA 17404 ------------------------
The name and/or position of the person authorized to execute instruments conveying, encumbering, or
otherwise affecting title to real property on behalf of the Entity is Travis J. Stewart, Vice President
The limitations upon the authority of the person named above or holding the position described above
to bind the Entity are as follows (if no limitations, insert "None"): _N_o_ne ___________ _
Other matters concerning the manner in which the Entity deals with any interest in real property are {if
no other matter, leave this section blank): _____________________ _
EXECUTED this 20th day of January
Signature: ~-z____--
Name (printe~~
Title (if any): _T_re_a_su_re_r _____________ _
2022
STATE OF PENNSYLVANIA )
)SS.
COUNTY OF _Y_O_RK _____ _,)
The foregoing instrument was acknowledged before me this~ day of _Ja_n_u_ary _____ _, 20~
by Jeremy D. Lynch on behalf of North Hangs Ranch LLC a
Colorado limited liability company
Witness my hand and officif eal. .
My commission expires: /-· 1-)3
(Date)
[SEAL]
Commonwealth of P13nnsylvania -Nata~ Seal
Maureen K . Rutter, Notary Public
York County
My commission expires April 7, 2023
Commission number 1143041
Member, Pennsylvania Association of Notaries
1
((
Community Development Department
108 8th Street, Suite 401
Glenwood Springs, CO 81601
(970) 945-8212
www.garfield-county.com
PRE-APPLICATION
CONFERENCE SUMMARY
TAX PARCEL NUMBER: 2179-092-00-106 PRE-APP DATE: 11/4/20
PROJECT: Western Slope Materials – Silt Gravel Pit
OWNER: North Hangs Ranch LLC
REPRESENTATIVE: Travis Stewart & Sean Mello, Western Slope Materials
PRACTICAL LOCATION: Address TBD, approximately 2 miles northeast of Rifle Airport and 1 mile
west of the Town of Silt, off of the I-70 Frontage Road
ZONING: Rural
TYPE OF APPLICATION: Major Impact Review – Extraction, Gravel
I. GENERAL PROJECT DESCRIPTION
The Applicant is seeking a Land Use Change Permit for a commercial gravel pit to be located on a
portion of a 72 acre parcel just north of Interstate 70, approximately 2 miles northeast of the Rifle
Airport and 1 mile west of the Town of Silt. Approximately 40 +/- acres of the site would be
actively mined for gravel extraction. The site is located immediately adjacent to the Colorado
River. An overview of the site is attached.
The site is located across I-70 from an existing gravel mine operated by the Applicants but held
under different ownership. Given the separation by I-70 and ownership differences the clearest
path for processing is for the proposed site to be a new application. Amending the current permits
on the south side of I-70 to expand the mining area would be considered a substantial modification
to the existing permit and would also trigger a new application. If operation of the new gravel
mine is linked to the existing mine for purposes of access and processing (the Applicant presented
the potential for a conveyor system to operate between the two mines) then staff would likely
reconsider the options for processing a Substantial Modification to the existing permit depending
[=G( 'Tarfield County
2
on the details of the proposal. An updated pre-application meeting and summary would be
required to fine tune the details on that process.
Access to the new proposed mine is via the I-70 frontage road. The Applicant has indicated that
waivers may be requested on several submittal requirements/standards including from the Water
Supply Plan and Wastewater Treatment Plan. Significant areas/topics were noted by staff including
but not limited to: Traffic Study and Impacts, Industrial Use Setbacks and Standards (Section 7-
1001), Floodplain Issues/Study, Wetlands, Floodway Limitations, River Setbacks, Impact Analysis,
Noise and Visual Mitigation Standards, Re-vegetation/Reclamation, Stormwater and Drainage
Studies, and Irrigation Ditches (including the potential for relocation noted by the Applicant). Many
of these topics are covered in Section 7-1002.
Coordination with State DRMS review and permit applications were discussed. Reports and
submittals to the State can be provided as part of the County Application to avoid duplication and
reformatting.
II. COMPREHENSIVE PLAN
The property is designated in the County Comprehensive Plan as within the Town of Silt, Urban
Growth Area. The Town’s Comprehensive Plan Future Land Use 2017 Map shows the Applicant’s
property with a Public/Quasi Public Parks and Open Space designation. A follow-up pre-application
meeting with Town will need to be scheduled in accordance with the Count’s Intergovernmental
Agreement with the Towns.
III. REGULATORY PROVISIONS APPLICANT IS REQUIRED TO ADDRESS
• Garfield County Comprehensive Plan, 2030
• Garfield County Land Use and Development Code, as amended
• Section 4-101 – Common Review Procedures
• Section 4-105 – Major Impact Review
• Section 4-203 – Submittal Requirements
• Article 7, Standards (Article 7, Divisions 1-3, Section 7-1001 Industrial Use and Section 7-
1002 Gravel Extraction)
• Section 4-118 Waiver from Standards & Section 4-202 Waiver from Submittal Requirements
IV. SUBMITTAL REQUIREMENTS
Please refer directly to Table 4-201 and the list of General Application Materials in section 4-203.
Outlined below is a list of information typically required for this type of application.
• 4-203.B. General Application Materials
o Completed Application Form
o Completed Payment Agreement Form and application fees
o Proof of Ownership (title work, copy of the deed)
3
o If owner intends to have a representative, a letter of authorization to represent is
needed (a statement of authority form will also be required).
o Names and mailing addresses of properties within 200 ft. of the subject property.
o Mineral rights ownership for the subject property (demonstrated through a search of
Clerk and Recorders database and/or Assessors database, form and memo attached).
o A narrative describing the request and related information.
o Copy of this pre-application summary
• 7-203.C. A Vicinity map within a radius of approximately 3 miles
• 4-203.D. Site Plan
• 4-203-.E. Grading and Drainage Plan including any de-watering plans
• 4.203.F. Landscaping Plan
o Note: Industrial uses are exempt from landscaping standards unless reduction in
setbacks are being requested. Landscaping details may be required if proposed as
part of a screening mitigation plan.
• 4-203.G. Impact Analysis
• 4-203. J, K. Development Agreement / Improvements Agreement
o Note: Waivers may be requested from these requirements if there are no vesting
issues and no public improvements.
• 4-203. L. Traffic Study – Basic Traffic Study will be required.
• 4-203.M. Water Supply/Distribution Plan
o Note: The Applicant will need to demonstrate that there is a legal and adequate
water supply for all uses it is serving. The applicant should comp lete an analysis of
total anticipated employees’ time on the site. Waivers may be requested pursuant to
Section 4-118 and 4-202, from applicable code provisions regarding Water Supply
depending on the details of the proposed use.
• 4-203.N. Wastewater Treatment Plan
o Note: Depending on the details of the proposed use the Applicant may be required to
provide a wastewater/bathroom facility. If a Waiver is requested , the applicant
should provide justification and demonstrate compliance with the Waiver Criteria in
Section 4-118 and 4-202.
• Respond to Standards fully described in Article 7, Divisions 1, 2 and 3.
• Respond to Standards fully described in Section 7-1001 Industrial Use and Section 7-1002
Gravel Extraction with inclusion of required reports/plans (water quantity/quality, air
quality, noise/vibration, visual mitigation, reclamation, etc.)
• A Floodplain Development Permit pursuant to Section 4 -203.O will be required and may be
processed concurrently or as a Condition of Approval prior to issuance of the Land Use
Change Permit.
Submit three paper copies and one digital for applications. Additional copies will be requested upon
determination of completeness. See the land use code for addit ional information on submittal
requirements.
4
V. APPLICATION REVIEW
a. Review by: Staff for completeness recommendation and referral agencies for
additional technical review
b. Public Hearing: __ None (Director’s Decision)
_X Planning Commission
_X Board of County Commissioners
__ Board of Adjustment
c. Referral Agencies: May include Colorado Department of Transportation, Garfield County
Road and Bridge, Fire Protection District, Garfield County Consulting
Engineer, Garfield County Environmental Health, Division of
Reclamation, Mining and Safety (DRMS), Garfield County Vegetation
Management, FEMA, Colorado Parks and Wildlife, Division of Water
Resources and others.
VI. APPLICATION REVIEW FEES
a. Planning Review Fees: $ 525.00
b. Referral Agency Fees: $ TBD – consulting engineer/civil engineer fees
c. Total Deposit: $ 525.00 (additional hours are billed at $40.50 /hour
General Application Processing
The foregoing summary is advisory in nature only and is not binding on the County. The summary is
based on current zoning, which is subject to change in the future, and upon factual representations
that may or may not be accurate. This summary does not create a legal or vested right. The
summary is valid for a six month period, after which an update should be requested. The Applicant
is advised that the Application submittal once accepted by the County becomes public information
and will be available (including electronically for review by the public). Proprietary information can
be redacted from documents prior to submittal.
Pre-application Summary Prepared by:
Glenn Hartmann, Principal Planner Date: 11/5/20
/)/4-il--
5
C. Section 4-105 Major Impact
G"rfield County
Major Impact Rev iew Protes$
(Section 4 -105)
Step 1: Prc.applfcatlon Conference
•Apa:ilicant has 6 mon ths to i-ubmlt appllcJtlon
Step 2: Application Submfttill
Step 3 : Completeness Rev iew
•'20busrnessdays to r eview
•If incomplete, 60 days to remedy def,cienclu
Step 4 : Schedule Hearing and Provide Notice
•Published, p0sted, and mailed to adj.toentp,operty owners within 200
feet and m ineral owners, at least 30 days but no more than 60 days prior
lo Planning Commission public heari ng
Step 5: Referral
•21 day comment period
Step 6: Ev.i l ution by Director
Step 8: Schedule He.lrinc and Provide Nohce
•Published, po$ted, end malled to adjacent p,opetty owners w ith in 200 feet
and mineral owners, at lea st 30 days but no more than 60 days prior to
BOCC publk. hearing
Step 9 : BOCt Oorulon
6
WESTERN SLOPE MATERIALS / HANGS RANCH EXPANSION
PROPERTY DETAIL
WSM
WESTERN SlOPE MATERIALS
7
VICINITY MAP
COUNTY COMPREHENSIVE
PLAN FUTURE LAND USE MAP
--
s I
2 17908100194 ------------
2 17908100527
2 179<18!0010 1 8 -----, 9
2179093001 16
2 179083001D3
2 17908l00102
C ity/Town Limit
■
Urban G rowth Area
□
Pu b lic Lands / O pen Space
Fut ure Land Use
■ Industri al
■ M ix ed U se
■ C omme rcia l
■ Res H (7,500 sqfli t o 2 AdD u)
■ Res MH (2 t o 6 AdDu)
Res M (6 to 10 AdD u)
Res L (1 O+ A c/Du)
Reso urce Pro ductio n/N at ural
M oiling Addr~ss 9.50 S/..,11 r it,,'Al YO RK . f'A l 7.!fJ4
Zl 79094007ll
2 17'110300001
217909'100002
I
8
=Et Garfield County
C£RTIFICATION OF l\U.'1£RAL OWNE R RESL'\RC H
This form is to be completed and subm Uced with any app/lco-tion for a Lo nd Use Change Permit.
Mine ral in terests m ay b e seve re d fr o m s u rface righ t int e rests in real p ro p e rt y. C.R.$.§ 24-65.5-101, et seq,
r eq ui res notif i cati o n t o m i ner al owner s whe n a l and owner ap pl i es for an app licat i o n for d eve lopme nt from a
l oc al govemrne nt. As su ch, the lan d owne r must r esearch the cu r re nt own er s o f m i neral Inte r est s fo r t he
p r operty.
Th e Garfield Co u nty La nd Use a nd Deve lo p ment Co d e o f 2013 ("LU DC"J Secti on 4-101(E)(1)(b}(4) requ i r es
wr itten n ot ice t o o wne rs o f mine ra l interest s in t h e su bject p ro perty in accord anc e w it h C.R.S. § 24·65 . .5-101,
et seq , "as su ch owo e rs ca n b e ident ified t hr o ug h the r eco rd s i n the o ffice o f the Cl er k and Recor der o r
Assesso r, o r t hrough othe r m ea ns.'' Th i s form i s p roof o f applican t's co mpl ia nce w i t h the Co lorado Revi sed
St at u t es an d the LUD C.
The undersicned applican t certifies that mineral owners have been researched for the subject property as
requir•d pursuant to C.R.S. § 24-6S .S-101, ,r ••q, and S•cti on 4-101 (E)(l)(b}(4) of th• Garfi el d County Land
Use and Development Code, as amended. As a res ult o f that research , the undersigned ap plicant certifies
th• f ollowing (Please initial on th e blank line next to the sraremenr thar accurately reflects rhe result of
research):
__ I own t he e nt ire m i nea 1I est ate r el at i ve to t he su bject p r o per ty; o r
__ M iner a l s ar e owned by t h e parti es l i sted b elow
Th e n ames an d addresses o f any and a ll m i ner a l owners i d ent if i ed a r e p rov i ded bel ow (attach ad d it i o nal pages
as necessa r y):
Name of Mineral Own er Maili ng Address of Mineral Own er
I a cknowledg e I reviewed C.R.S. § 24•6S .5·101, et seq, and I am in compl iance with said statue and t h•
LUDC .
Applicant's Signature Date
I
9
TO:
FROM:
DATE:
RE:
Staff
c6 7a,field Coun(y
MEMORANDUM
County Attorney's Office
June 24, 2014
Mineral Interest Research
Mineral interests may be severed from surface right interests in real property. Colorado re,•ise-d
statute 24-65.5-103 requires notification to mineral O\\llcrs when a landowner applies for a lantl
use designation by a l~al government. As such, the landowner must research the current owners
of mineral interests for the property.
The Garfi eld Cowity Land Use and Development Code of 2013 ("LUDC") Section 4-
IOJ (E)(l)(b)(4) requires ,-ritten notice to owners of mineral interests in the subject property "as
such owners can be identified through the records in the office of the Clerk and Recorder or
Assessor, or through other m=s."
It is the duty of the applicant to notify mineral interest owners. The following is a suggested
process to research mineral interests:
I. Re vie w the current o\\11ership deed for the property (i .e . Warranty Deed, Special
Warranty, Quit Claim Deed or Barg;,in and Sale Deed -NOT a Deed of Trust). The
ownership deed is usually one or two pages. Is there a reservation of mineral interests on
the owni,;ship deed? Are there any exceptions to title? A deed may include a list of
reservations thal reference mineral owneis or oil and gas leases.
2 . Review your 1i1le insurance policy. Ale there exceptions to title lis1ed under Schedule B-
Ii? If so, review for tniner.J inlcrests lhal were reserved and oil and gas leases.
3. Check with the Assessor's office to delemune if a mineral interest has been reseived
from the subject property. The Assessor's office no longer dreuments the mineral
rcscrvalion ownership for its tax mll reco1ds unless ownership has been prov01. There
are only a limited number of mineral owners who have provided such informat ion 10 lhe
Assessor's office so this may not provide any inforu1a1ion, depending on your property.
10
MEMO
June 24, 2014
Page2
4 . Research the legal description of the subject property with the Clerk and Recorder's
computer. You can search the Section, Township, and Range of the subject property.
You may find deeds for mineral interests for the subject property.
5. Research whether a Notice of Mineral Estate Ownership was filed for the subject
property. On the Cfork and Recorder's computer, search under Filter (on the right hand
side of the screen), General Recordings, Notice of Mineral Esta1e Owner.ship for the
subject property.
6. If you find mineral interest owners as reservations on your deed, listed in your title
insurance policy, from the Assessor's records or the Clerk and Recorder's computer, you
need to determine whether these mineral interests were transferred by deed and recorded
in the Clerk and Recorder's office.
7. Enter the name of the mineral interest owner as the Granto, in the Clerk and Recorder's
computer to sec if the mineral interest was transferred. If you find a transfer deed, you
need to repeat this process to follow any transfer oftbe mineral interest to present day.
8. Include a description of your resenrcb process in your applicatinn and the namc(s) and
address(es) of the current mineral interest owncr(s).
Mineral interest research can be a difficult and time consuming process. If you are w,able to
determine mineral rights ownership by yourself, consider hiring an attorney or landman.
Attorneys and landmen specialize in determining mineral rights ownership, but they charge a fee
for their services.
North Hangs Mine
February 2022 11
Ownership
The owner of the land to be mined in North Hangs ranch LLC. A deed showing the owner’s fee
title interest in the land for which a Land Use Change is proposed is included in this application
package.
II Lewicki & Associates
932600 03/04/2020 04:15:34 PM Page 1 of 2
Jean Alberico, Garfield County, Colorado
Rec Fee: $18.00 Doc Fee: $240.00 eRecorded
WARRANTY DEED
THIS DEED, made on March 4, 2020,
Between Gypsum Ranch Co. LLC, a Colorado limited liability company,
of the County of Garfield, and State of Colorado, grantor, and
North Hangs Ranch LLC, a Colorado limited liabilit{company
whose legal address is : c/o The Stewart Companies, 950 Smile Way, York, PA 17404
of the County of York and State of Pennsylvania, grantee:
WITNESS ETH, That the grantor for and in consideration of t he sum of $2,400,000.00 DOLLARS, the receipt and sufficiency of
which is hereby acknowledged, has granted, bargained, sold and conveyed, and by these presents does grant, bargain, sell and convey
and confinn unto the grantee, its successors and assigns forever, all the real property together with improvements, if any, situate, lying
and being in the County of Garfield and State of Colorado described as follows :
A Parcel of land being a portion of that property described within that Warranty Deed 1·ecorded as Reception No.
682731 of the Garfield County records situated in Government Lot 3, Government Lot 4, and the West 1/2 of the
Southwest 1/4 of Section 9, Township 6 South, Range 92 West of the Sixth Principal Meridian, Ga.-field County,
State of Colorado lying Northwest of the Northwest boundary line of that parcel of land conveyed to the Colorado
Department of Highways for Interstate Highway No. 70 in deed recorded January 31, 1974 in Book 454 at Page
440 and in correction deed recorded September 7, 2005 in Book 1724 at Page 422 and lying Northwest of the
Northwest boundary line of that parcel of land conveyed to the Colorado Department of Highways for Interstate
Highway No. 70 in deed recorded February 6, 1974 in Book 455 at Page IO and that prope1iy lying northerly of
said Lot 3 and Lot 4 and Southwesterly of the centerline of the Colorado River within said Section 9; Said Parcel
of land being more fully described as follows :
f...a Beginning at the West one quarter corner of said Section 9, thence along the westerly boundary of said West 1/2 of
the Southwest 1/4 S.00°45'15"E a distance of 595.17 feet to a point on the said northwest boundary line of those
said parcels of land conveyed to the Colorado Department of Highways for Interstate Highway No. 70; thence
leaving said westerly boundary and along said northwest boundaries the following 3 courses:
1.) N 55°58'53" E 1302.00 feet;
2.) N 75°16'53" E 227.00 feet;
3.) N 55°58'53" E 1067.22 feet to a point in the centerline of said Colorado River thence leavi11g said Northwesterly
Right-of-Way and along said centerline the following seven (7) courses:
I.) N 50°00'00" W 570.12 feet;
2.) N 35°00'00" W 450.00 feet;
3.) N 65°00'00" W 425.00 feet;
4.) N 75°00'00" W 475.00 feet;
5.) S 80°00'00" W 250.00 feet;
6.) N 89°00'00" W 300.00 feet;
7.) S 85°00'00" W 130.00 feet to a point on the westerly boundary of said Section 9;
thence leaving said centerline and along said westerly boundary S.00°45'15" .Ea distance of 1776.33 feet to tile
Point of Beginning.
1 Including therewith all sand, gravel, and aggregates located on, under, within, or that may be produced from said real
property.
932600 03/04/2020 04:15:34 PM Page 2 of 2
Jean Alberico, Garfield County, Colorado
Rec Fee: $18.00 Doc Fee: $240.00 eRecorded
Reserving and excepting therefrom, however, all of Grantor's right, title and interest in all oil and gas in, under and that may
be produced from the Property.
as known by street and number as:
TOGETHER with all and singular the hereditaments and appurtenances thereto belonging, or in anywise appertaining, and the
reversion and reversions, remainder and remainders, rents, issues and profits thereof, and all the estate, right, title, interest, claim and
demand whatsoever of the grantor either in law or equity, of, in and to the above bargained premises, with the hereditaments and
appurtenances.
TO HA VE AND TO HOLD the said premises above bargai11ed and described, with the appm1enances, unto the grantee, its
successors and assigns forever. And the Grantor, for itself and its successors and assigns, does covenant, grant, bargain, and agree to
and with the Grantee, its successors and assigns, that at the time of the ensealing and delivery of these presents, it is well seized of the
premises above conveyed, has good, sure, perfect, absolute and indefeasible estate of inheri tance, in law, in fee simple, and has good
right, full power and lawful authority to grant, bargain, sell and convey the same in manner and fo,m as aforesaid, and that the same
are rree and clear from all fonner and other grants, bargains, sales, liens, taxes, assessments, encumbrances and restrictions of
whatever kind or nature soever, subject to statutory exceptions as defined in § 38-30-1 I 3(5)(a), C.R.S.
The grantor shall and will WARRANT AND FOREVER DEFEND the above bargained premises in the quiet and peaceable
possession of the grantee, its successors and assigns, against all and eve1y person or persons lawfully c laiming the whole or any pa1t
thereof, The singular number shall include the plural, the plural the singular, and the use of gender shall be applicable to all genders.
IN WITNESS WHEREOF the grantor has executed this deed on the date set fo1th above.
Gypsum Ranch Co. LLC, a Colorado limited liability company
By:
STATE OF COLORADO )
) ss.
COUNTY OF GARFIELD )
The foregoing instrument was acknowledged before me on March 4 , 2020, by Gregg P. Rippy as Manager of Gypsum Ranch Co. LLC ,
a Colorado limited liability company.
WITNESS my hand and official seal
Commonwealth File No. 1902039-4
Re turn to:
North Hangs Ranch LLC
c/o The Stewart C ompanies
950 Smile Way
Y ork, PA 17404
LINDA GABOSSI ,: /n t(.C._L-Jtt/Jo~
NOTARY PUBLIC Nota1y Public
STATE Of COLORADO
NOTARY 10 #111894007523
My Commillion ~ May 23, 2021
RESEARCH METHODOLOGY
I was engaged to research the mineral ownership and any lessees of said minerals in Government Lots 3
& 4 and the West Half of the Southwest Quarter of Section 9, Township 6 South Range 92 West of the
6th Principal Meridian, near Silt CO, Garfield County. I conducted a thorough research project of the
chain of title, from patent to present. There are two patents for the subject lands, said patents conveyed
the surface and mineral interests to the patentees. The deed recorded at Reception Number 166614
reserved one-quarter (1/4) of the oil, gas mineral interests to the Grantor, Barney Wright. No other
reservations of the subject minerals occurred until Gypsum Ranch LLC conveyed the subject surface
lands to North Hangs Ranch LLC, through recordation of the Warranty Deed at Reception Number
932600. This deed includes all sand, gravel and aggregates, however reserves and excepts “all of
Grantor’s right, title and interest in all oil and gas in, under and that may be produced from the
property.” Hence, Gypsum Ranch owns three-quarters (3/4) of the mineral rights. The mineral interests
of Barney Wright reserved in the aforementioned deed have passed down through numerous
generations, a list of current owners is provided herewith. All addresses provided below were found in
recorded documents in the Garfield County Clerk and Recorder’s Office and are the most current
available. This search is effective through 1/14/2022.
Mineral Rights Owners and Mailing Addresses:
Gypsum Ranch LLC
818 Colorado Avenue
Glenwood Springs CO 81601
Shirley Jones
8073 Hemingway
San Diego CA 92102
Barbara L Hardie
2187 E Gauthier Road #330
Lake Charles LA 70607
Fossil Creek Land Company
PO Box 485
Mustang OK 73064
Kathleen Lambert
3817 Selkirk Road
Sandpoint ID 83864
Daniel Nichols
PO Box 1666
Orange CA 92856
Betty Jean Lindley
1065 Pine Drive
Mohave Valley AZ 86440
McClung Trust
4200 Summers Lane #58
Klamath Falls OR 97603
Carol Sanger
1507 Oro Grande
Yuba City CA 95993
Riley W McClung
10550 County Road 319
Rifle CO 81650
Don McClung
181 Willow Circle Drive
Parachute CO 81635
Karen McClung
172 South Ridge Court
Parachute CO 81635
Jerry L Bussell
Gene A Bussell
6036 Bayhill Drive
Farmington NM 87402
TEP Rocky Mountain LLC
3050 Post Oak Blvd Suite 1500
Houston TX 77056
Elmer Blackmore
650 Birch Court
Rifle CO 81650
Colleen Damrow
4278 Round Lake Road
Klamath Falls OR 97601
Kenneth R Kelley
7703 S Elm Court
Littleton CO 80122
Kimmer Lee Jepson
553 Rio Borde Court
Grand Junction CO 81507
Delma Jean Cain
1040 E Osborn #601
Phoenix AZ 85014
Victoria E Glover
Lee Poteet
4035 Valley Drive
Pueblo CO 81008
Garry Lee Wright
20285 County Road 8
Meeker CO 81641
Mineral Rights Lessees:
Williams Production RMT (An Internet search indicates this is the current mailing address)
1515 Arapahoe Street Tower 3
Suite 1000
Denver CO 80202
Above Lease Assigned to:
CR Pool LLC
PO Drawer 790
Glenwood Springs CO 81602
Antero Resources Piceance Corporation (See Below)
1625 17th Street
Denver CO 80202
An Internet Search finds Antero Resources at the following address:
1615 Wynkoop Street
Denver CO 80202
North Hangs Mine
February 2022 12
Adjacent Property Owners and Mineral Owners and
Lessees
A list and a map of real property within a 200-foot radius of the subject property is given below.
Parcel # Owner
217908100194 ASPIRI ENTERPRISES LLC
2125 1ST AVENUE APARTMENT 2704
SEATTLE WA 98121
217909200085 STATE OF COLORADO DIVISION OF WILDLIFE
6060 BROADWAY
DENVER CO 80216-1029
217908100527 SHIDELEROSA LLLP
1411 COUNTY ROAD 316
SILT CO 81652
No Parcel Number Interstate 70
Colorado Department of Transportation
2829 W. Howard Pl.
Denver, CO 80204
A list of mineral estate owners in the Subject site is given below:
Parcel # Owner
217909200106 North Hangs Ranch LLC 950 Smile Way York Pa 17404
II Lewicki & Associates
North Hangs Mine
February 2022 13
Fees
A certified check is enclosed for this application.
II Lewicki & Associates
ce 'rarfield County
PAYMENT AGREEMENT FORM
GARFIELD COUNTY ("COUNTY") and Property Owner ("APPLICANT") __________ _
_ W_e_st_e_r_n_S_l_o~p_e_M_a_te_r_ia_ls~,~L_L_C _________________ agree as follows:
1. The Applicant has submitted to the County an application for the following Project: __ _
Land Use Change Appli cation-North Hangs Mine
2. The Applicant understands and agrees that Garfield County Resolution No. 2014-60, as
amended, estab li shes a fee schedule fo r each type application, and the guidelines for the
administration of the fee structure.
3. The Applicant and the County agree that because of the size, nature or scope of the
proposed project, it is not possible at this time to ascertain the full extent of the costs
involved in processing the application. The Applicant agrees to make payment of the Base
Fee, established for the Project, and to thereafter permit additional costs to be billed to the
Applicant. The Applicant agrees to make additional payments upon notification by the
County, when they are necessary, as costs are incurred.
4. The Base Fee shall be in addition to and exclus ive of any cost for publication or cost of
consulting service determined ne cessary by the Board of County Comm issioners for the
consideration of an application or additional County staff time or expense not covered by
the Base Fee. If actual recorded costs exceed the initial Base Fee, the Applicant shall pay
additional billings to the County to reimburse the County for the processing of the Project.
The Appl i cant acknowledges that all billing shall be paid prior to the final consideration by
the County of any Land Use Change or Division of Land.
I hereby agree to pay all fees related to this application:
Bi lling Contact Person:_T_r_a_v_is_S_t_e_w_a_rt _________ Phone: ( 970 ) 309-1515
Billing Contact Address: _P_O_B_o_x_1_3_1_9 _____________________ _
City: Carbondale State: CO Zip Code: 81623 -------
Billing contact Email: tjs@ws-materials .com
Printed Name of Person Authorized to Sign: Travis J . Stewart ----------------------
01/19/2022
(Signature) (Date)
North Hangs Mine
February 2022 14
Project Description
Western Slope Materials Inc. proposes to mine the North Hangs Mine gravel deposit to support
its construction materials activities in the Silt, CO area. Material will be mined, crushed,
screened and washed at the North Hangs Mine before being transported offsite for further use.
Material from this operation will be used in a variety of necessary uses in the area including
infrastructure projects, road and highway maintenance, residential and commercial construction
as well as material to support local readymix and asphalt production. There is sufficient topsoil
and overburden onsite to successfully reclaim the site to its final condition of a lake with
rangeland slopes. No asphalt manufacturing will take place onsite.
Western Slope Materials intends to use the North Hangs Mine to support its ongoing presence
in the community. To that end, it has designed the operation to incorporate upfront landscaping
work, early reclamation and wetlands expansion, long term processing, and eventual final
reclamation into a lake and associated wetlands. This Project Description will outline the need
for the operation, provide detailed information about the project including timelines, schedule of
operations, employee presence, project size, and explanation of all functional aspect of the
proposed development including mining and reclamation plans.
North Hangs Mine will operate over two main stages: first: mining and production of construction
materials, second: the production of construction materials from imports, coupled with final
reclamation of the mined area. The first stage (the Mining Stage) will use the natural resource
present on the site to provide raw material to processing facilities also onsite in order to make
construction material products for the local market. The second stage (the Recycling Stage) will
make use of the developed site infrastructure to process imported material into construction
materials products.
Table 1. Proposed timeline of approvals and operational events
Date Pending Action Stage
2021 SUP Approval/DRMS
approval
Mining
2022 Landscaping & Access
installed
Mining
2023 Augmentation Plan
secured
Mining
2024 Wetlands plan
approval from
USACOE
Mining
2025 Operations beginning Mining
2030 Phase 2 anticipated
start
Mining
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North Hangs Mine
February 2022 15
2035 Phase 2 mining
complete
Mining
2036 Reclamation of
mining areas
complete. Import
becomes principal
material source.
Recycling
2060 Processing of
import material
potentially ends.
Recycling
2061 Reclaim processing
area to final
conditions.
Reclaimed
2063 Reclamation is
determined
complete by
CDRMS. Site is
releases and
operations end.
Reclaimed
2. Statement of Need
Western Slope Materials (WSM) has provided the area with the highest quality aggregates for
over a decade. Locating, managing and conserving sand and gravel reserves in Garfield
County is of the highest priority for local producers and the County alike as it is a limited
resource. As the Colorado River valley has become developed and populations have grown,
opportunities to secure gravel reserves have become increasingly fewer. After years of
research and study, Western Slope Materials has concluded that only a handful of such sites
actually exist. With typically long permitting durations, WSM recognizes the need to start the
process well in advance of the actual mining activities occurring. The North Hangs site provides
an excellent resource that can be utilized to support projects, maintenance and development
while being responsibly managed for years to come. An ancillary benefit to a site like this will be
the opportunity to create future water storage in conjunction with recycling locally excavated
materials.
3. Mining Stage
A phased mining plan will be used to minimize the cumulative impacts of the mining operation.
Concurrent reclamation will facilitate the healthy development of expanded and enhanced
wetlands on the property while mining takes place. Berms and buffers will minimize the offsite
impacts of the operation. Finally, the facility will eventually reduce to a long term operation of
II Lewicki & Associates
North Hangs Mine
February 2022 16
material processing (Recycling Stage) surrounded by wetlands and lakes abutting the Colorado
River. Figure 3 shows a render of what the site will look like in this eventual condition.
The start of operations at the North Hangs Mine is currently scheduled to occur in 2025-2026.
There are items that WSM will ultimately need to have in place, including a water augmentation
plan and an approved wetlands plan from the Army Corps of Engineers that will require
significant time to develop. These items however, are not required until specific activities in the
mining timeline occur. For example, a wetlands mitigation plan through the U.S. Army Corps of
Engineers is not required until wetlands are disturbed, an event that will occur with the
beginning of Phase 2 several years into mining. Similarly, the water augmentation plan will not
be required until groundwater is exposed during mining, which will occur early in Phase 1, but
not for several years from the time of this application. Conditional approval of this SUP by the
County will allow early development work to be conducted onsite. This early development work
will maximize the effectiveness of impact mitigation efforts over the life of the mine.
No wetlands will be disturbed without an approved mitigation plan and/or permit from the
USACOE. No groundwater will be exposed without an augmentation plan in place.
Mining & Reclamation Plans
The site of the proposed North Hangs Mine is 72.8 acres and is currently rangeland/shrubland
(see Map C-1). The Bernudy Ditch (WDID 4500524)1 is located within the permit area. The
North Hangs Mine will be accessed from County Road 346. Mining will take place in two
principal phases. The first phase will mine around the Bernudy Ditch and wetlands onsite. The
second phase will mine out the ditch path and associated wetlands. During Phase 1, wetlands
will be established as part of reclamation that are greater in total area than the wetlands to be
disturbed in Phase 2. Also, the Bernudy Ditch will be rerouted via a buried pipe around the
mining area. Maps C-2 and C-3 show the two phases of mining. Map G-2 shows the pipe
reroute details.
Prior to beginning activities on the site, the boundaries of the affected area will be clearly
marked. Signs and markers will be posted at the mine entrance listing the name of the Operator,
Western Slope Materials, and the operation name, “North Hangs Mine”; a statement that a
reclamation permit for the operation has been issued by the Colorado Mined Land Reclamation
Board; and the DRMS permit number. The current access to the property will be used for mining
(Maps C-2 & C-3). Internal roads and ramps will be used throughout the life of the mining
operation as needed and will all be reclaimed. Maps C-2 and C-3 show mining extents for each
mining phase.
Topsoil and overburden will be stripped at North Hangs Mine and placed in stockpiles and
berms. This stripping will take place in advance of mining of areas but is not anticipated to
happen all at once. Map C-4 shows the topsoil stripping in advance of mining in the cross
sections. Berms will be installed at the start of operations on the site as part of stormwater
1 https://dwr.state.co.us/Tools/Structures/4500524
3.1.
II Lewicki & Associates
North Hangs Mine
February 2022 17
controls (Maps C-2 & C-3). Further details on the berms can be seen on Map G-1. Additionally,
berms will be constructed as part of visual and noise impact mitigation along the south side of
the operation. These visual berms will be built according to the specifications found on Maps C-
2 & C-3 and revegetated promptly upon their construction.
Topsoil that is stripped and not required for the construction of the berms will be immediately
placed as part of contemporaneous reclamation, stockpiled on-site in the topsoil storage area,
or shipped offsite. Temporary stockpiles of overburden or topsoil required for reclamation will
typically be 20 feet in height. Temporary stockpiles will be located in the designated area shown
on Maps C-2 & C-3. Overburden present on site will be stripped during mining and either placed
directly on mined out ground as part of reclamation, stored in the stockpile area, or be sold as
fill. Mining to final slopes and the direct placement of overburden onto reclamation slopes will
reduce the need to stockpile overburden material and shorten the time that it will take to reclaim
the mine. Details on topsoil and overburden quantities and material balance can be found in the
CDRMS permit exhibits attached as Appendix 4.
The groundwater table is roughly seven feet below ground level based on site investigations.
Since groundwater will be exposed/encountered during mining, the entire pit will be dewatered
using a pump. Details regarding this dewatering can be found in CDRMS Exhibit G in Appendix
4.
Throughout the mine life the minimum setbacks shown on Map C-3 will be maintained. During
Phase 1, setbacks as shown on Map C-2 will be maintained. All mining will be within the 100-
year floodplain, but no permanent fill will take place in this area. A floodplain impact analysis
has been conducted and can be found in this application with the Floodplain Development
Permit. Storm water control berms and stockpiles will be present during mining but removed
during reclamation. Additionally, the excavation of topsoil and overburden from the site will
create storage volume for storm and flood events onsite. See Map G-1 and Exhibit G of the
CDRMS application in Appendix 4 for more information on surface water management.
Further details of mining and reclamation activities can be found in the CDRMS permit
application in Appendix 4.
Wetlands
Western Slope Materials commissioned a wetlands survey of the site conducted by
Environmental Solutions Inc (ESI) prior to any disturbance to determine the extent of wetlands
that are present onsite. This survey is attached to the CDRMS application Exhibit J. Figure 9.
shows the extent of wetlands as mapped during a survey conducted by Environmental Solutions
Inc, see the attached ‘Wetlands Delineation Report’, found in Appendix 7.
Phase 1 will be mined in such a manner as to leave a setback of at least 30 feet from all existing
wetlands. Prior to the initiation of Phase 2 mining in 2030 a portion of the area mined in Phase 1
will be back-filled and allowed to revert to wetlands (see Map F-1). These backfilled portions of
Phase 1 will be intentionally developed as wetlands to mitigate anticipated future wetland
disturbances onsite. This new wetland area will be 5.9 acres in size, larger than the 3.8 total
3.2.
II Lewicki & Associates
North Hangs Mine
February 2022 18
acres of wetlands that are currently cataloged as existing on the site. By creating a wetland that
is larger than the total amount of wetlands currently on the site, WSM is assuring that the mining
conducted during Phase 2 will not have an overall deleterious effect on the wetlands on the site.
It is in this manner that the overall area of wetlands contained within the affected parcel will
either remain the same or will increase in size as mining progresses. By phasing the mining and
reclamation process, WSM will be able to have a fully reclaimed area that is adjacent to the I-70
travel corridor, and which will thus act as a screen for the follow-on mining operations in the
early stages of the mine life. The value of the property as a wildlife area will be greatly
enhanced with this increase in wetland, groundwater lake and edge habitat (see
Wildlife/Vegetation below). No wetland disturbance will take place prior to USACOE approval of
a mitigation plan.
Figure 8. Existing 3.8 acres of wetlands as determined during site survey.
Figure 10. indicates the extent of wetlands that will exist after all reclamation is complete. The
wetlands in the southeast section of the site will be completed prior to the start of Phase 2
mining. This wetland will encompass 5.9 acres.
.. Existing wetland
areas delineated by
survey
North Hangs Pit
Permit Boundary
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February 2022 19
Figure 9. Final extent of proposed wetlands after reclamation is complete.
Figure 10 gives the existing view that an automobile driver traveling eastbound on I-70 has of
the wetland area on the southeastern portion of the permit area. During Phase 1, this area of
the site, excluding the existing wetlands, will be mined first. Prior to the start of Phase 2, this
area will be backfilled and allowed to revert to wetlands. The total area that will be allowed to
convert to wetlands prior to the start of Phase 2 is 5.9 acres, more than the 0.23 acres of
wetlands currently existing in this area, and more than the total of 3.8 acres of wetlands mapped
on the entire site by Environmental Solutions Inc. By completing the reclamation of this section
of the site prior to the start of Phase 2, WSM will be achieving two goals: 1) reducing the visual
impacts of Phase 1 mining to the I-70 travel corridor and 2) mitigating the effects of mining on
the site’s wetlands inventory.
..,
..., Proposed wetlands
North Hangs Pit
Permit Boundary
II Lewicki & Associates
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February 2022 20
Figure 10. View of existing wetlands captured from perspective of automobile driver
looking northeast from eastbound I-70. This view will remain essentially unchanged after
this area is mined and reclaimed.
Prior to disturbing any wetlands at the beginning of Phase 2 in 2030, the applicant will secure
any applicable US Army Corps of Engineers permits. Conditional approval of this SUP and
Mitigation Plan will enable WSM to obtain the required US Army Corps of Engineers permits.
Western Slope Materials plans to have constructed and enlarged the total area of wetlands on
the site before any wetlands are disturbed in Phase 2.
Water Consumption
Water for the operation will be purchased as needed. Exposure of groundwater and dewatering
of the mine will require a substitute water supply plan (SWSP), augmentation plan, and a gravel
well permit.
Water consumption for the North Hangs Mine will fall into five main categories.
• Control Dust on the Haul Roads and Excavation Areas
• Control Dust for Crushing and Screening Plant Operations
3.3.
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February 2022 21
• Wash Plant Operations
• Loss of groundwater to evaporation
• Concrete Production
Due to the fact that the majority of mining will take place below the water table, material
excavated from the mine will be inherently wet and thus pose a low risk of generating excessive
dust. Water application for dust control on haul roads and excavation areas will take place as
needed. Active stockpiles and others may require additional watering to ensure material stays
wet. Additional watering may be needed during very dry windy conditions during mining
operations. The facility manager will determine when and where this is needed during
operations. Long term topsoil stockpiles will be vegetated to minimize water consumption for
dust control as well as to prevent soil loss from said stockpiles.
The crushing/screening plant uses water to control dust with water sprays at the entrance and
on the screen deck. It is anticipated that the material will not require a large amount of water to
control dust during processing due to its inherently wet nature.
The wash plant will be used to remove fines from the material. This will produce fines in the
bottom of the wash ponds adjacent to the plant. These ponds will be inspected monthly for
capacity. Fines will need to be removed periodically from the wash ponds. The frequency of this
clean out will depend on production rates. Fines removed from the wash ponds via cleanout will
either be sold as a product or mixed in with the backfill in the pits. These fines will never be
placed outside of storm water controls.
An augmentation plan will be required to offset the evaporative losses from the groundwater
lakes created as part of the final use of the mine. Until such an augmentation plan is in place
and approved by the State of Colorado, no groundwater exposure will take place. WSM
proposes to have the SUP and the Mitigation Plan conditionally approved prior to the finalization
of an augmentation plan, which will be in place before the start of mining (see timeline Table 1).
Similarly, the CDRMS permit will be limited to above groundwater excavation until an
augmentation plan is approved.
Timetable
An approximate maximum timetable for the North Hangs Mine operation is shown on Table 2.
This timeline will allow Western Slope Materials to satisfy the need for construction material and
services in the Colorado River valley and surrounding community.
Table 2. Mining Timetable
Years Activity
1 Installation of access, development of processing area, and construction of visual and
stormwater berms. Installation of landscaping elements along the south side of the operation.
1-10 Phase 1 mining, beginning with south east pit (Pit 1).
3.4.
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February 2022 22
3-5 Reclamation of Pit 1 and associated wetland creation.
5-7 Bernudy Ditch reroute via pipe.
10-15 Phase 2 mining and concurrent reclamation.
15+ Processing operations continue using import material as supplied. Mining of processing area
and final reclamation upon departure of processing operations from site.
Over the life of the mine, a total of 1.5 million tons of material will be extracted at a rate of
roughly 100,000 tons per year. This will result a mine life of approximately 15 years, assuming
consistent market conditions. The processing area shown on Maps C-2 and C-3 will continue to
operate beyond the completion of mining and reclamation activity onsite (see Map F-1). It is
Western Slope Materials goal to use the processing facilities as long as market conditions
facilitate it. Once it is no longer feasible to processing import material at North Hangs, the
processing area will be mined out and reclaimed to produce the final lake configuration shown
on Map F-2.
4. Recycling and Reclamation Stage
Once the mineral deposit is mined out, reclamation will be completed on the bulk of the
property. All that will be left as industrial activity is the processing area and a small ready-mix
concrete operation. This area will operate as a processing facility for imported material, much of
which will be recyclable asphalt and concrete. In this stage the facility will import feed materials
and export construction materials for projects. Mining will be complete, and activity will be
confined to a modest portion of the site. The reclaimed lake portion of the site will provide water
for washing and may be a prime site for the possibility of storing water for local municipalities.
From an operational standpoint, the recycling equipment will be the same identical equipment
used during the gravel extraction phase of the project with no special or different equipment
needed. Stockpiles will be identical materials as well as dimensionally identical because the
same conveyors and stackers will be used.
All operational, non‐mining impacts remain the same, including noise, operating hours, area,
extent of operations, dust and potential visual impacts (stockpiles, etc.). There are no mining
impacts because that phase will have been completed. This use is intended to be permanent
until another use is identified and permitted. Traffic will similarly be the same from mining to
recycling as the same type of trucks and similar amount of trucks will enter and exit the site.
5. Schedule of Operations
Hours of operation at the North Hangs Mine will be limited to Monday thru Saturday, 7am to 7
pm. Operations may be limited during winter months due to freezing conditions and market
demands. Only emergency maintenance will take place at night. Lighting to support such
emergency work will be downcast and limited.
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6. Number of Employees
The operation will employ approximately five to ten full time employees (five in sand & gravel,
five in ready-mix operation). This number may vary based on seasonal demands for products.
7. Equipment and Facilities
The anticipated equipment and facilities that will be used at the North Hangs Mine are listed in
Table 3. All facilities will be portable, with the exception of the truck scale.
Table 3. Typical Onsite Equipment and Facilities
Equipment Type Facility
Excavator Office trailer
Bulldozer Fuel farm
Water Truck Crusher/screen
On-highway Dump Truck Concrete plant
Road Grader Wash plant
Loader Truck scale
Fuel Tank Portable toilets
Mobile Pump
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Vicinity Map
An 8-inch by 11-inch Vicinity Map locating the parcel in the County is included with this
application package. The Vicinity Map indicates the boundaries of the subject property and all
property within a three-mile radius of the site.
II Lewicki & Associates
Vicinity Map
North Hangs M ine
1.5 mi
Overvi ew
Legend
Parcels
Roa ds
Highw ays
Limited Access
Highwa y
Major Road
Loca l Roa d
Minor Road
Other Road
Ra mp
Ferry
Pedestria n Way
Lakes & River s
County Boundar y
Line
Vicinity Map
North Hangs Mine
2,640 ft
Overview
Legend
Parcels
Roads
Highways
Limited Access
Highway
Major Road
Local Road
Minor Road
Other Road
Ramp
Ferry
Pedestrian Way
Lakes & Rivers
County Boundary
Line
D
North Hangs Mine
February 2022 25
Site Plan
Maps in the CDRMS application in Appendix 4 serve as the site plan for this application. This
site plan includes:
1. Legal description
2. Boundary Lines
3. Topographic Contours
4. Significant on-site features (drainage ways, wetlands, etc.)
5. Existing and proposed roads
6. Existing roadways
7. Users and grantees of existing and proposed easements and rights of way
8. Area of parcel
9. Zone district (it is ‘Rural’)
10. Location and dimension of all existing and proposed structures, with distance to
property lines
11. Elevation drawings (Cross sections) with existing and finished grades
12. Location and size of signs for the purpose of identification etc.
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Grading and Drainage Plan
The North Hangs Mine affected area is located adjacent to the Colorado River. The disturbance
area of the site will be at least 100 feet from the Colorado River, southwest of the river.
Groundwater is roughly four feet below the natural grade and is the alluvial aquifer of the
Colorado River. The 100-YR FEMA floodplain encompasses the entire mining area. There is no
mapped floodway within the property. Temporary stormwater control berms, topsoil, and
overburden stockpiles will exist during mining, but will be removed for reclamation.
Exhibit G of the CDRMS application in Appendix 4 contains all hydrologic calculations.
Maps showing the applicable information required by the Garfield Land Use and Development
Code for Grading and Drainage Plans are listed in Table 4.
Table 4. Grading, Drainage, and Hydrology Maps
Grading Plan Maps Drainage & Hydrology Plan Maps
C-2 Phase 1 Mining Plan G-1 Hydrology Map
C-3 Phase 2 Mining Plan G-2 Ditch Reroute
C-4 Cross Sections
F-1 Rec Plan with Processing
F-2 Final Reclamation Plan
All slopes greater than 20% are identified on the Grading Plan maps listed above.
1. Construction Schedule
The schedule of steps to bring the North Hangs Mine online are outlined below in Table 5. For
the purpose of this land use application, construction is considered to cover the start up period
of mining operations only.
Table 5. North Hangs Startup Construction Schedule
Days Activity
0-5 Stake and mark all boundaries
5-35 Strip initial topsoil from processing area and build berms. Install temporary erosion control
measures around visual berms. Seed all long term berms and stockpiles.
35-60 Install permanent site access. Install temporary erosion control measures along perimeter.
60-100 Vegetation development on all applicable areas.
100-105 Removal of temporary erosion control measures as vegetated areas reach 80% cover.
2. Permanent Stabilization
Permanent stabilization will be accomplished early in the operation life on the visual berms via
vegetation with the seed mix within Exhibit E of the CDRMS application in Appendix 4. The
processing area and active mining pits will maintain internal drainage using slopes and
stormwater berms until they are reclaimed. All portions of the site will be reclaimed according to
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February 2022 27
Exhibit E of the CDRMS application in Appendix 4, including vegetation measures identified
therein.
3. Erosion and Sediment Control Measures - Estimate Cost
Temporary soil erosion control measures include the construction, maintenance, and removal of
stormwater berms. Temporary seeding of stormwater berms. Temporary seeding of stockpiles
as needed. Occasional watering for dust suppression as needed. Erosion control measures can
be seen on Map G-1, which is attached to this application. The total cost of these measures is
estimated to be $ 25,000.
4. Neighboring Areas
Neighboring areas of the North Hangs Mine are shown in Figure 11. N. Zoning for neighboring
parcels is shown, with the North Hangs property highlighted in red. All surrounding zoning is
Rural.
Figure 11. North Hangs and Neighboring Areas
N
Irrigated
Pasture
Rangeland and
Irrigated Pasture Rangeland
(CPW)
Active Mine
Current Garfield County Zon ing
Incorporated City or Town
Public Lands
Rural
Industria l
Commercial/General
Commercial/Limited
2 17909100033
~H904300413
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5. Stormwater Management Plan
A stormwater management plan has been developed for North Hangs, in accordance with
CDPHE guidance for such plans. The SWMP has not been submitted to CDPHE as no
discharge permit has been applied for yet. Upon approval of this land use change permit,
permits such as the CDPHE discharge permit will secured in advance of operations.
A copy of the proposed SWMP can be found in Appendix 6.
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Reclamation Plan
This section describes the plans and processes involved in reclaiming and landscaping the site
in order to transform it to its ultimate post-mining use as rangeland and a groundwater lake. The
landscape plans are scaled at 1 inch to 20 feet and are as shown on Map F-1. Reclamation will
occur contemporaneously during the Mining Stage as portions of the permit area are mined.
Final reclamation of the permit area will occur after the end of the Recycling Stage. Current use
of the permit area is that of a rangeland. Final use of the permit area is proposed to be
rangeland with a groundwater lake for the benefit of local wildlife.
Details on reclamation procedures for the site can be found in Exhibit E of the CDRMS
application in Appendix 4.
6. Seeding Plan
Details regarding the seed mix, mulching, and areas to be seeded can be found in Exhibit E of
the CDRMS application in Appendix 4.
7. Topsoil Handling Plan
Details regarding the stripping, handling, storage, and replacement of topsoil can be found in
Exhibit E of the CDRMS application in Appendix 4.
8. Weed Management Plan
All disturbance proposed for the North Hangs Mine is for the long term function of the site.
Therefore, a weed management plan is not required. Nevertheless, a weed control plan can be
found in Exhibit E of the CDRMS application in Appendix 4 as it is required by CDRMS.
9. Revegetation Security
A bond for reclamation will be in place for North Hangs Mine in accordance with state law, prior
to any site disturbance. This bond will include revegetation costs as calculated by the CDRMS.
No additional Garfield County bond is necessary.
10. Hydraulic Calculations
Details regarding the hydraulic calculations for the North Hangs Mine can be found in Exhibit G
of the CDRMS application in Appendix 4.
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11. Maintenance Requirements
Maintenance of all proposed best management practices (BMPs) and stormwater control
measures (SCMs) will take place in the due course of the mining operation at North Hangs.
Access to all areas requiring maintenance will be achieved via the primary site access. Western
Slope Materials, in accordance with the necessary state permits and agencies regulating water
discharge and mining, will be responsible for maintaining all BMPs and SCMs at North Hangs.
12. Spill Prevention and Countermeasures Plan
A Spill Prevention and Countermeasure Plan (SPCC Plan), prepared under the supervision of a
Colorado licensed professional engineer, has been developed for North Hangs. It is attached in
Appendix 5.
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Landscape Plan
As the North Hangs Mine is an industrial use, a landscape plan is not required according to
Section 7-303 of the Garfield County LDC. Reclamation and revegetation plans can be found in
Exhibit E of the CDRMS permit application attached in Appendix 4.
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Impact Analysis
Sections 7-1002 and 7-1003 of the Garfield County Land Use and Development Code (Code)
address mitigation efforts required for permitted gravel mining operations in Garfield County.
Garfield County requires adherence to Colorado State Statutes (CRS) §25-12, which
establishes statewide standards for noise level limits for various time periods and areas.
1. General Impact Mitigation
All impacts discussed in this section are primarily mitigated by two factors: 1) the inherent
topographical differences between the mining operations onsite and 2) the surrounding land and
groves of trees along the Colorado River that will be maintained. All mining activities will take
place in an area of the site that sits below the existing grade, with the exception of topsoil
stripping and initial stockpiling. Processing will occur at an elevation approximate to the current
ground level, but the installation of ten foot high berms on the south side of the processing and
stockpile area will act to mitigate the visual impacts of the processing and stockpile area to the
south. These berms will remain in place after the reclamation of mining areas, as the processing
and stockpile area will continue to operate after mining at the North Hangs Mine is complete.
While there will be a concrete plant, there will not be an asphalt batch plant operating at North
Hangs. Topsoil stripping will be conducted in short term periods of the year, typically in the early
spring or late fall. Trees will be planted to in-fill the existing vegetation along the Colorado River
and near the berms constructed along the south side of processing area. These trees will
mitigate the visual and noise impacts of the operation to the Town of Silt, Colorado and the I-70
corridor.
Note that any reference to ‘Exhibits’ or ‘Maps’ refers to Exhibits and Maps contained within the
attached Colorado Division of Reclamation, Mining, and Safety (CDRMS) application
components for the North Hangs Mine unless specifically stated otherwise.
2. Adjacent Land Use
The proposed Land Use Change would allow for the development of a gravel mine at the
location. This use is consistent with the industrial/commercial aspect of adjacent land including
an existing gravel mine 1000 feet southeast of the proposed North Hangs Mine and the I-70
corridor along the southern boundary of the property. To the west is agricultural land used as
irrigated pasture for cattle. To the north is the Colorado River, with Colorado Parks and Wildlife
open space across the river to the northeast. Across the river to the northwest is agricultural
land consisting of rangeland and a single residence.
3. Site Features
Map C-1 of the CDRMS permit application in Appendix 4 shows the site features including
floodplain area, wetlands, water pathways, ditches, topography, vegetative cover, and more.
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4. Soil Characteristics
A soil report was generated using the United States Department of Agriculture’s NRCS Web
Soil Survey (WSS) and is included in the CDRMS permit application in Appendix 4 as part of
Exhibit I. The WSS provides soil data and information produced by the National Cooperative
Soil Survey. The majority of the site (89.6%) is split between three soil types, Wann,
Halaquepts, and Torrifluvents (see Map C-1). Each of these primary soil types are described on
the following pages.
Suitability for Reclamation and Landscaping
All three soil types provide an average of at least 12 inches of suitable material for revegetation.
All three soils are listed as class VII without irrigation. Class VII are not suitable for cultivation
and are restricted to grazing by domestic animals or wildlife; all are listed as climatically limited
soils.
Soil Type Descriptions
Wann sandy loam, 1 to 3 percent slopes
Map Unit Setting
National map unit symbol: jnzc
Elevation: 5,000 to 6,500 feet
Farmland classification: Prime farmland if irrigated and reclaimed of excess salts and sodium
Map Unit Composition
Wann and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Wann
Setting
Landform:Terraces, valley floors
Landform position (three-dimensional):Tread
Down-slope shape: Linear, convex
Across-slope shape: Linear, convex
Parent material: Alluvium derived from sandstone and shale
Typical profile
H1 - 0 to 8 inches: sandy loam
H2 - 8 to 60 inches: fine sandy loam, sandy loam, coarse sandy loam
H2 - 8 to 60 inches:
H2 - 8 to 60 inches:
Properties and qualities
Slope:1 to 3 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Runoff class: Very low
Capacity of the most limiting layer to transmit water (Ksat): High (2.00 to 6.00 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: OccasionalNone
Frequency of ponding: None
Calcium carbonate, maximum content:10 percent
Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water capacity: Very high (about 26.3 inches)
Interpretive groups
Land capability classification (irrigated): 4w
4.1.
4.1.1.
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Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: A/D
Ecological site: R048AY265CO - Salt Meadow
Hydric soil rating: Yes
Custom Soil Resource Report 18
Minor Components
Torrifluvents
Percent of map unit:5 percent
Hydric soil rating: No
Kim
Percent of map unit:5 percent
Hydric soil rating: No
Arvada
Percent of map unit:5 percent
Hydric soil rating: No
Halaquepts, nearly level
Map Unit Setting
National map unit symbol: jnxr
Elevation: 5,400 to 7,400 feet
Frost-free period: 101 to 135 days
Farmland classification: Not prime farmland
Map Unit Composition
Halaquepts, nearly level, and similar soils:85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Halaquepts, Nearly Level
Setting
Landform:Terraces, fans, valleys
Landform position (three-dimensional):Tread
Down-slope shape: Convex, linear
Across-slope shape: Convex, linear
Parent material: Alluvium
Typical profile
H1 - 0 to 8 inches: clay loam
H2 - 8 to 24 inches: loam
H3 - 24 to 60 inches: stratified very gravelly cobbly sand
Properties and qualities
Slope:0 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Poorly drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr)
Depth to water table: About 0 inches
Frequency of flooding: Occasional None
Frequency of ponding: None
Calcium carbonate, maximum content:10 percent
Gypsum, maximum content: 5 percent
Maximum salinity: Moderately saline to strongly saline (8.0 to 16.0 mmhos/cm)
Sodium adsorption ratio, maximum:30.0
Available water capacity: Low (about 3.9 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 6w
Hydrologic Soil Group: C/D
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Hydric soil rating: Yes
Torrifluvents, nearly level
Map Unit Setting
National map unit symbol: jnz3
Custom Soil Resource Report 16
Elevation: 5,000 to 7,000 feet
Mean annual precipitation: 12 to 15 inches
Mean annual air temperature: 46 to 48 degrees F
Frost-free period: 90 to 120 days
Farmland classification: Not prime farmland
Map Unit Composition
Torrifluvents and similar soils:85 percent
Minor components:15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Torrifluvents
Setting
Landform: Distributaries, rivers, flood plains
Down-slope shape: Linear, convex
Across-slope shape: Linear, convex
Parent material: Alluvium
Typical profile
H1 - 0 to 36 inches: loam
H2 - 36 to 60 inches: sand
Properties and qualities
Slope:0 to 6 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Moderately well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high (0.60 to 2.00
in/hr)
Depth to water table: About 12 to 36 inches
Frequency of flooding: Occasional None
Frequency of ponding: None
Calcium carbonate, maximum content:5 percent
Gypsum, maximum content:1 percent
Maximum salinity: Very slightly saline to moderately saline (2.0 to 8.0 mmhos/cm)
Sodium adsorption ratio, maximum:2.0
Available water capacity: Moderate (about 7.6 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7w
Hydrologic Soil Group: C
Hydric soil rating: No
Minor Components
Wann
Percent of map unit:10 percent
Landform: Terraces
Hydric soil rating: Yes
Fluvaquents
Percent of map unit:5 percent
Landform: Marshes
Hydric soil rating: Yes
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5. Geology and Hazard
A geologic hazards study by Kumar & Associates was conducted on the property. It can be
found in Appendix 3.
6. Groundwater and Aquifer Recharge Areas
Mining activity at the North Hangs Mine will be conducted below the groundwater table. This is
facilitated through the dewatering process during mining; dewatering pumps drain the active pit
of groundwater to allow for mining activity to take place below natural grade. The dewatering of
the pits will take place under an approve CDPHE discharge permit and CDWR gravel well
permit.
Groundwater is located approximately four feet below the surface of the ground onsite. No wells
are located within 600 feet of the proposed pit 2. Mining activity will expose groundwater from the
very beginning of operations. Dewatering of the pit will take place to bring the groundwater table
below the operating floor. This allows equipment to safely and effectively mine the alluvial
deposit. The pit pump will be active continuously during the mining season, which typically is
mid-April to early-November, depending on weather. The pit pump will not run during flood
events or when temperatures drop below freezing.
The only known aquifer in the area is the shallow alluvial aquifer of the Colorado River. Depth to
water table in the permit area varies depending on location and time of year but averages
roughly four feet below ground surface. According to the U.S. Geological Survey’s Ground
Water Atlas of the United States, the only groundwater aquifer system below the alluvial one in
this area is the Unita-Animas Aquifer System. This is located beneath the Mancos Shale that
underlays the site alluvium and will not be reach by mining or affected by mining
Wastewater and sewage will be stored in a portable vault toilet that will be service by a
contractor. This will prevent sewage or effluent from wastewater from entering the Colorado
River alluvial aquifer.
The 100-YR floodplain of the Colorado River encompasses the entire site. See the Floodplain
Analysis for details.
2 https://gis.colorado.gov/dnrviewer/Index.html?viewer=dwrwellpermit
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7. Environmental Impacts
An environmental impact analysis has been conducted by Environmental Solutions, Inc. and
can be found in Appendix 2.
8. Nuisance
A detailed discussions of all potential impacts to adjacent land from generation of vapor, dust,
smoke, noise, glare or vibration, or other emanations can be found under the Additional
Standards for Gravel Operations section further on in this SUP application.
9. Hours of Operation
Hours of operation at the North Hangs Mine will be limited to Monday thru Saturday, 7am to 7
pm. As specified in Article 7-1001.H.
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Improvements Agreement
No improvements agreement is applicable to the North Hangs Mine. All reclamation standards
and related surety are administered by the Colorado Mined Reclamation Board.
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Traffic Study
A traffic study by Kimley Horn is attached to this section.
II Lewicki & Associates
Traffic Impact Study
North Hangs Pit
Garfield County, Colorado
Prepared for:
Western Slope Materials
•
Kimley >>> Horn
T R A F F I C I M P A C T S T U D Y
North Hangs Pit
Garfield County, Colorado
Prepared for
Western Slope Materials
14682 Colorado 82
Carbondale, CO 81623
Prepared by
Kimley-Horn and Associates, Inc.
Curtis D. Rowe, P.E., PTOE
4582 South Ulster Street
Suite 1500
Denver, Colorado 80237
(303) 228-2300
April 2021
This document, together with the concepts and designs presented herein, as an instrument of
service, is intended only for the specific purpose and client for which it was prepared . Reuse of
and improper reliance on this document without written authorization and adaptation by
Kimley-Horn and Associates, Inc. shall be without liability to Kimley-Horn and Associates, Inc.
04/02/2021
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page i
TABLE OF CONTENTS
TABLE OF CONTENTS ................................................................................................... i
LIST OF TABLES .............................................................................................................ii
LIST OF FIGURES ...........................................................................................................ii
1.0 EXECUTIVE SUMMARY ........................................................................................... 1
2.0 INTRODUCTION ....................................................................................................... 2
3.0 EXISTING AND FUTURE CONDITIONS .................................................................. 4
3.1 Existing Study Area ...........................................................................................................4
3.2 Existing Roadway Network ................................................................................................4
3.3 Existing Traffic Volumes ....................................................................................................7
3.4 Unspecified Development Traffic Growth ...........................................................................7
4.0 PROJECT TRAFFIC CHARACTERISTICS ............................................................. 12
4.1 Trip Generation................................................................................................................12
4.2 Trip Distribution ...............................................................................................................13
4.3 Traffic Assignment ...........................................................................................................13
4.4 Total (Background Plus Project) Traffic............................................................................13
5.0 TRAFFIC OPERATIONS ANALYSIS ...................................................................... 18
5.1 Analysis Methodology ......................................................................................................18
5.2 Key Intersection Operational Analysis .............................................................................19
6.0 CONCLUSIONS AND RECOMMENDATIONS ....................................................... 23
APPENDICES
Appendix A – Intersection Count Sheets
Appendix B – Trip Generation Worksheets
Appendix C – Intersection Analysis Worksheets
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page ii
LIST OF TABLES
Table 1 – North Hangs Pit Project Traffic Generation ................................................................13
Table 2 – Level of Service Definitions .......................................................................................18
Table 3 – CR-316/Frontage Road and CR-315 LOS Results ....................................................19
Table 4 – I-70 Westbound Ramp and CR-315 LOS Results ......................................................20
Table 5 – I-70 Eastbound Ramp and CR-315 LOS Results .......................................................21
LIST OF FIGURES
Figure 1 – Vicinity Map ................................................................................................................3
Figure 2 – Site Area ....................................................................................................................5
Figure 3 – Existing Lane Configurations and Control...................................................................8
Figure 4 – 2021 Existing Traffic Volumes ....................................................................................9
Figure 5 – 2022 Background Traffic Volumes............................................................................10
Figure 6 – 2037 Background Traffic Volumes............................................................................11
Figure 7 – Project Trip Distribution ............................................................................................14
Figure 8 – Project Traffic Assignment .......................................................................................15
Figure 9 – 2022 Background Plus Project Traffic Volumes ........................................................16
Figure 10 – 2037 Background Plus Project Traffic Volumes ......................................................17
Figure 11 – Recommended Lane Configurations and Control ...................................................22
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 1
1.0 EXECUTIVE SUMMARY
North Hangs Pit is a proposed 73-acre gravel pit development to be located at the east end of
County Road 316 (CR-316)/Frontage Road in Garfield County, Colorado. It is expected that the
gravel pit will be open by the end of 2022 and that excavation will occur for 15 years with pit
operations ending around 2037; therefore, analysis was completed for the 2022 short term
opening and 2037 long term closing horizons.
The purpose of this study is to identify project traff ic generation characteristics, to identify
potential project traffic related impacts on the local street system, and to develop mitigation
measures required for identified impacts. The following intersections were identified for
incorporation and evaluation within t his study:
• County Road 315 (CR-315) and CR-316/Frontage Road
• Interstate 70 (I-70) Westbound Ramp and CR-315 (Interchange 94)
• I-70 Eastbound Ramp and CR-315 (Interchange 94)
Regional access to the project will be provided b y Interstate 70 (I-70), while primary access will
be provided by CR-315. Direct access to the site will be provided at the east end of CR-
316/Frontage Road.
North Hangs Pit is expected to generate approximately 64 daily trips with 18 trips occurring
during each of the morning and afternoon peak hours . Distribution of project traffic on the street
system was based on the area street system characteristics, existing traffic patterns and
volumes, demographic information, and the proposed access system for the project.
Assignment of project traffic was based upon the trip generation described previously and the
distributions developed.
Based on the analysis presented in this report, Kimley-Horn believes North Hangs Pit will be
successfully incorporated into the existing and future roadway network without the need for any
traffic improvements. All project intersections are expected to operate acceptably throughout the
2037 study horizon with their existing lane configuration and control.
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 2
2.0 INTRODUCTION
Kimley-Horn and Associates, Inc. has prepared this report to document the results of a Traffic
Impact Study of future traffic conditions associated with North Hangs Pit, an approximate 73-
acre gravel pit development to be located at the east end of County Road 316 (CR-
316)/Frontage Road in Garfield County, Colorado. A vicinity map illustrating the project site
location is shown in Figure 1. It is expected that the gravel pit will be open by the end of 2022
and that excavation will occur for 15 years with pit operations ending around 2037; therefore,
analysis was completed for the 2022 short term opening and 2037 long term closing horizons.
The purpose of this study is to identify project traff ic generation characteristics, to identify
potential project traffic related impacts on the local street system, and to develop mitigation
measures required for identified impacts. The following intersections were identified for
incorporation and evaluation within this s tudy:
• County Road 315 (CR-315) and CR-316/Frontage Road
• Interstate 70 (I-70) Westbound Ramp and CR-315 (Interchange 94)
• I-70 Eastbound Ramp and CR-315 (Interchange 94)
Regional access to the project will be provided by Interstate 70 (I-70), while primary access will
be provided by CR-315. Direct access to the site will be provided at the east end of CR-
316/Frontage Road.
70
/
CR-221
RIFLE SILT ROAD
(CR-340) GARFIELD COUNTY
REGIONAL AIRPORT
~
NC=>FI-Y-1--1
NlS 196171000
FIGURE 1 NORTH HANGS PIT
~v~1 c~1 N~1 T...:...Y ..:M~AP ______ 7 Kimley >>> Horn
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 4
3.0 EXISTING AND FUTURE CONDITIONS
3.1 Existing Study Area
The existing site and adjacent area surrounding the site is vacant land. The Colorado River
borders the site to the north. The Garfield County Regional Airport is located west of the site on
the south side of I-70. The City of Rifle is located west of the project site. To the northeast is the
Town of Silt. The land uses and roadway network surrounding the site within the project study
area are shown in the aerial of Figure 2.
3.2 Existing Roadway Network
CR-316/Frontage Road currently provides a single through lane of travel in each direction
eastbound and westbound. Both the I-70 Westbound and Eastbound Ramps provide single
lanes on the on and off ramps. CR-315 provides one through lane in each direction northbound
and southbound with a speed limit of 35 miles per hour southbound and 20 miles per hour
northbound as traffic approaches the Interstate 70 interchange .
The intersection of CR-316/Frontage Road and CR-315 operates with yield control on the
eastbound and westbound approaches. The eastbound approach consists of a shared
through/right turn lane. The westbound approach consists of a shared left turn/through lane.
The northbound approach consists of a shared left turn/right turn lane. This intersection is
shown in the following photo.
CR-316/Frontage Road and CR-315
NORTH HANGS PIT
SITE AREA
NC::::,FITI-I
NlS 196171000
FIGURE 2
Kimley >>> Horn
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 6
The intersection of the I-70 Westbound Ramp with CR-315 is stop controlled with a stop sign on
the westbound approach. The westbound approach consists of one lane for all movements.
The northbound approach consists of a shared left turn/through lane. The south bound
approach consists of a shared through/right turn lane (shown in following photo).
I-70 Westbound Ramp and CR-315
The intersection of the I-70 Eastbound Ramp with CR-315 is stop controlled with a stop sign on
the eastbound approach. The eastbound approach consists of one lane for all movements.
The northbound approach consists of a shared through/right turn lane. The southbound
approach consists of a shared left turn/through lane (shown in following photo).
I-70 Eastbound Ramp with CR-315
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 7
The intersection lane configuration and control for the study area intersections are shown in
Figure 3.
3.3 Existing T raffic Volumes
Existing peak hour turning movement counts were conducted on Tuesday, March 9, 2021,
Wednesday, March 10, 2021 , and Thursday, March 11, 2021 . The counts were conducted
during the morning and afternoon peak hours of adjacent street traffic in 15-minute intervals
from 7:00 AM to 9:00 AM and 4:00 PM to 6:00 PM on these count dates. The turning
movement counts are shown in Figure 4 with count sheets provided in Appendix A.
3.4 Unspecified Development Traffic Growth
Based on a comparison of existing and anticipated future traffic volume in this overall study area
from review of the City of Rifle Transportation Master Plan, traffic volumes within this study area
are anticipated to increase by an annual approximate two (2) percent growth rate. It is believed
that applying this growth rate to the key study intersections in the project area will provide a
conservative analysis as this equates to a 37 percent traffic volume increase by 2037. This
annual growth rate of two (2) percent was used as a basis for determining the 2022 short-term
and 2037 long-term horizon years. Background traffic volumes for 2022 and 2037 are shown in
Figure 5 and Figure 6, respectively.
CID
CR-316/FRONTAGE RD
1-70
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
"7 Yield Controlled Approach
e Stop Controlled Approach
ii Roadway Speed Limit
FIGURE 3
6(3)4(1)4(4)
1(2)
2(0)28(31)3(3)4(0)0(4)1(2)
4(2)
57(77)23(35)47(71)54(73)1(1)6(3)
2(0)
23(30)
AM : Wednesday, March 10, 2021
PM : Tuesday, March 9 , 2021
8 :00-9:00 AM (4:30-5:30 PM)
' r
AM : Thursday, March 11, 2021
PM: Tuesday, March 9, 2021
7: 15-8: 15 AM (5: 00-6: 00 PM)
AM: Wednesday, March 10, 2021
PM: Tuesday, March 9, 2021
7: 15-8: 15 AM ( 4: 30-5: 30 PM)
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
XXX(XXX) Weekday AM(PM)
Peak Hour Traffic Volumes
!XX,XOO! Estimated Daily Traffic Volume
NORTH HANGS PIT FIGURE 4
........ E_x_1s_T1_NG_TR_A_F_F1c_v_oL_u_M_Es ___ ....,. Kimley >>) Horn ........._...
10(5)5(5)5(5)
5(5)
5(0)30(35)5(5)5(0)0(5)5(5)
5(5)
60(80)25(40)50(75)60(75)5(5)10(5)
5(0)
25(35)
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
Weekday AM(PM)
XXX(XXX) Peak Hour Traffic Volumes
1xx.xoo1 Estimated Daily Traffic Volume
FIGURE 5 NORTH HANGS PIT
~2~0~22~8 A..:,:C~K.:.:. GR~o_u N_o __ vo_L_UM_E_s __ 7 Kimley >)) Horn
10(5)10(5)10(10)
5(5)
5(0)40(45)5(5)10(0)0(10)5(5)
10(5)
80(110)35(50)65(100)75(105)5(5)10(5)
5(0)
35(45)
' r
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
Weekday AM(PM)
XXX(XXX) Peak Hour Traffic Volumes
1xx.xoo1 Estimated Daily Traffic Volume
FIGURE 6 NORTH HANGS PIT
~2~0~37~BA~C~K G~R..:.o_u N_o_v_o_Lu_M_E_s __ 7 Kimley >>) Horn
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 12
4.0 PROJECT TRAFFIC CHARACTERISTICS
4.1 Trip Generation
Site-generated traffic estimates were determined based on anticipated pit operation
characteristics provided by the user of the gravel pit. It is anticipated that up to 100,000 tons of
aggregates and 12,000 cubic yards of ready-mix concrete could be moved from the site in a
year. No aggregate dump trucks will be stored onsite as all of this aggregate material will be
moved by third party companies. Four (4) ready-mix concrete trucks will be stored onsite to
move the concrete material. The pit is anticipated to be open for operations from 6:30 am to
4:30 pm for a total of 10 hours per day.
With 25-ton aggregate dump trucks, the yearly 100,000 tons of material excavated per year
would equate to a total of 4,000 dump truck round trips in a year. With approximately 260
working days throughout a year, the 4,000 yearly dump truck round trips would equate to an
average of 16 aggregate truck round trips per day (32 total dump truck trips per day). This
equates to 1.6 aggregate dump truck round trips during each hour. To provide a conservative
analysis, it was assumed that two (2) aggregate dump trucks would arrive and depart during
each studied peak hour.
Likewise, with an eight (8) cubic yard capacity ready-mix concrete truck, the 12,000 cubic yards
processed each year equates to 1,500 ready-mix concrete trucks round trips per year. Again,
assuming the 260 working days throughout the year, this equates to an average of six (6) ready-
mix concrete truck round trips per day. It was assumed that with four ready -mix concrete trucks
stored onsite, four exiting ready-mix concrete trucks would depart the site during the morning
peak hour, with two trucks returning and departing midday, and then wi th all four returning
during the afternoon peak hour to provide a conservative analysis.
The gravel pit is anticipated to have a total of 10 employees, with five employees for the
aggregate operations and five employees for the ready-mix concrete operations. It was
assumed that these 10 employees would all arrive during the morning peak hour and would all
depart in the afternoon peak hour in single occupant veh icles to provide a conservative analysis.
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 13
Based on this information of the anticipated pit operations, it was determined North Hangs Pit
would generate approximately 32 daily round trips (64 daily total trips) with 18 trips occurring
during each of the morning and afternoon peak hours. Table 1 summarizes the anticipated trips
that will be generated in association with the facility. The trip generation derivations are included
in Appendix B.
Table 1 – North Hangs Pit Project Traffic Generation
Trip Type
Daily
Round
Trips
Total
Daily
Trips
Weekday Vehicle Trips
AM Peak Hour PM Peak Hour
In Out Total In Out Total
25-Ton Dump Trucks
8-CY Concrete Trucks
Total Truck Trips
16
6
22
32
12
44
2
0
2
2
4
6
4
4
8
2
4
6
2
0
2
4
4
8
Employee Trips 10 20 10 0 10 0 10 10
Total Trips 32 64 12 6 18 6 12 18
4.2 Trip Distribution
Distribution of site traffic on the street system was based on t he area street system
characteristics, existing traffic patterns and volumes, anticipated surrounding development
areas, and the proposed access system for th e project. The directional distribution of traffic is a
means to quantify the percentage of site-generated traffic that approaches the site from a given
direction and departs the site back to the original source. The project trip distribution is
illustrated in Figure 7.
4.3 Traffic Assignment
Project traffic assignment was obtained by applying the project trip distribution to the estimated
traffic generation of the development shown in Table 1. Total project traffic assignment is shown
in Figure 8.
4.4 Total (Background Plus Project) Traffic
Project traffic volumes were added to the background volumes to represent estimated traffic
conditions for the short-term 2022 and long-term 2037 horizons. Figure 9 illustrates the
background plus project traffic volumes for the 2022 horizon at the study key intersections. The
2037 total long-term horizon traffic volumes for the study area are shown in Figure 10.
I I I I I I I I I I
40%[40%]40%[60%]60%100%[100%][60%]1-70
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
XX% External Trip Distribution Percentage ....
Entering[Exiting]
XX%[XX%] Trip Distribution Percentage
FIGURE 7 NORTH HANGS PIT
~P~R_:::OJ::E~CT~TR~I P_D_I s_TR_I B_u_T_1o_N -----, Kimley >)) Horn
12(6)6(12)5(2)2(5)4(7)7(4)4(7)5(2)
CR-316/FRONTAGE RD
1-70
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
Weekday AM(PM)
XXX(XXX) Peak Hour Traffic Volumes
1xx.xoo1 Estimated Daily Traffic Volume
FIGURE 8 NORTH HANGS PIT
~P:,.:.:R~O~JE~C~TTR~A~F-FI_C _A_s_s1_ GN_M_E_N T __ 7 Kimley >)) Horn
10(5)20(15)5(5)
5(5)
15(15)30(35)10(10)10(5)5(15)15(10)
5(5)
60(80)25(40)50(75)60(75)10(15)15(10)
5(0)
25(35)
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
Weekday AM(PM)
XXX(XXX) Peak Hour Traffic Volumes
1xx.xoo1 Estimated Daily Traffic Volume
NORTH HANGS PIT FIGURE 9 2022 BACKGROUND PLUS
~P~R~OJ~E.::.;CT~T~R~A-FF_I c_v_o_Lu_M_E_s -----, Kimley >>) Horn
10(5)25(15)10(10)
5(5)
15(15)40(45)10(10)15(5)5(20)15(10)
10(5)
80(110)35(50)65(100)75(105)10(15)15(10)
5(0)
35(45)
' r
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
Weekday AM(PM)
XXX(XXX) Peak Hour Traffic Volumes
1xx.xoo1 Estimated Daily Traffic Volume
NORTH HANGS PIT FIGURE 10 2037 BACKGROUND PLUS
~P_.:,:R~OJ::E.:.CT.:......:.:.TR~A---FF_I c_vo_L_U M_E_s __ --, Kimley >)) Horn
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 18
5.0 TRAFFIC OPERATIONS ANALYSIS
Kimley-Horn’s analysis of traffic operations in the vicinity of the site was conducted to determine
potential capacity deficiencies in the 2022 and 2037 development horizons at the identified key
intersections. The acknowledged source for determining overall capa city is the current edition
of the Highway Capacity Manual1.
5.1 Analysis Methodology
Capacity analysis results are listed in terms of Level of Service (LOS). LOS is a qualitative term
describing operating conditions a driver will experience while traveling on a particular street or
highway during a specific time interval. It ranges from A (very little delay) to F (long delays and
congestion). For intersections and roadways in this study area, standard traffic engineering
practice identifies overall LOS D for signalized intersections and LOS E for movements and
approaches of unsignalized intersections as the minimum threshold for acceptable operations.
Table 2 shows the definition of level of service for signalized and unsignalized intersections.
Table 2 – Level of Service Definitions
Level of
Service
Signalized Intersection
Average Total Delay
(sec/veh)
Unsignalized Intersection
Average Total Delay
(sec/veh)
A ≤ 10 ≤ 10
B > 10 and ≤ 20 > 10 and ≤ 15
C > 20 and ≤ 35 > 15 and ≤ 25
D > 35 and ≤ 55 > 25 and ≤ 35
E > 55 and ≤ 80 > 35 and ≤ 50
F > 80 > 50
Definitions provided from the Highway Capacity Manual, Sixth Edition, Transportation Research Board, 2016.
Study area intersections were analyzed based on average total delay analysis for unsignalized
intersections. Under the unsignalized analysis, the level of service (LOS) for a two-way stop-
controlled intersection is determined by the co mputed or measured control delay and is defined
for each minor movement. Level of service for a two-way stop-controlled intersection is not
defined for the intersection as a whole. Of note, level of service for a signalized and four-way
stop controlled intersection is defined for each approach and fo r the intersection.
1 Transportation Research Board, Highway Capacity Manual, Sixth Edition, Washington DC, 2016.
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 19
5.2 Key Intersection Operational Analysis
Calculations for the level of service at the key in tersections for the study area are provided in
Appendix D. The existing year analysis is based on the lane geometry and intersection control
shown in Figure 3. The existing peak hour factors were utilized in the existing, 2022 horizon,
and 2037 horizon analyses. Due to the low volumes at the key intersections, the existing peak
hour factors were used for the 2037 analysis instead of the recommended HCM urban area
peak hour factor of 0.92. Synchro traffic analysis software was used to analyze the study
intersections and access driveways for level of service.
CR-316/Frontage Road and CR-315
The existing unsignalized intersection of CR-316/Frontage Road and CR-315 operates with
yield control on the eastbound and westbound approach es. With the existing control and lane
configuration, the intersection is anticipated to operate acceptably throughout the 2037 horizon
with the addition of North Hangs Pit project traffic. Therefore, no improvements or modifications
are anticipated to be needed. Table 3 provides the results of the level of service at this
intersection.
Table 3 – CR-316/Frontage Road and CR-315 LOS Results
Scenario
AM Peak Hour PM Peak Hour
Delay
(sec/veh) LOS Delay
(sec/veh) LOS
2021 Existing
Northbound Left
Eastbound Approach
Westbound Approach
7.2
8.4
9.0
A
A
A
7.2
8.3
9.6
A
A
A
2022 Background
Northbound Left
Eastbound Approach
Westbound Approach
7.3
8.4
9.3
A
A
A
7.2
8.4
9.7
A
A
A
2022 Background Plus Project
Northbound Left
Eastbound Approach
Westbound Approach
7.3
8.4
9.5
A
A
A
7.2
8.4
9.6
A
A
A
2037 Background
Northbound Left
Eastbound Approach
Westbound Approach
7.3
8.4
9.3
A
A
A
7.2
8.4
9.7
A
A
A
2037 Background Plus Project
Northbound Left
Eastbound Approach
Westbound Approach
7.3
8.4
9.9
A
A
A
7.2
8.4
9.7
A
A
A
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 20
I-70 Westbound Ramp and CR-315
The existing unsignalized intersection of I-70 Westbound Ramp and CR-315 operates with stop
control on the westbound offramp approach . With the existing control and lane configuration, the
movements at this intersection are anticipated to operate acceptably throughout the 2037
horizon with the addition of project traffic . Table 4 provides the results of the level of service at
this intersection.
Table 4 – I-70 Westbound Ramp and CR-315 LOS Results
Scenario
AM Peak Hour PM Peak Hour
Delay
(sec/veh) LOS Delay
(sec/veh) LOS
2021 Existing
Northbound Left
Westbound Approach
7.4
9.6
A
A
7.5
9.6
A
A
2022 Background
Northbound Left
Westbound Approach
7.4
9.6
A
A
7.5
9.7
A
A
2022 Background Plus Project
Northbound Left
Westbound Approach
7.4
9.6
A
A
7.5
9.9
A
A
2037 Background
Northbound Left
Westbound Approach
7.5
10.1
A
B
7.5
10.3
A
B
2037 Background Plus Project
Northbound Left
Westbound Approach
7.5
10.2
A
B
7.6
10.5
A
B
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 21
I-70 Eastbound Ramp and CR-315
The existing unsignalized intersection of I-70 Eastbound Ramp and CR-315 operates with stop
control on the eastbound offramp approach. With the existing control and lane configuration, the
movements at this intersection are anticipated to operate acceptab ly throughout the 2037
horizon. Table 5 provides the results of the level of service at this intersection.
Table 5 – I-70 Eastbound Ramp and CR-315 LOS Results
Scenario
AM Peak Hour PM Peak Hour
Delay
(sec/veh) LOS Delay
(sec/veh) LOS
2021 Existing
Eastbound Approach
Southbound Left
9.0
7.5
A
A
8.9
7.5
A
A
2022 Background
Eastbound Approach
Southbound Left
9.2
7.6
A
A
9.0
7.5
A
A
2022 Background Plus Project
Eastbound Approach
Southbound Left
9.2
7.9
A
A
9.2
7.6
A
A
2037 Background
Eastbound Approach
Southbound Left
9.4
7.6
A
A
9.2
7.6
A
A
2037 Background Plus Project
Eastbound Approach
Southbound Left
9.5
8.0
A
A
9.4
7.7
A
A
Based on the results of the in tersection operational analysis, the key intersection recommended
improvements and control are shown in Figure 11.
CID
NORTH HANGS PIT
202 2 & 2037 RECOMMENDED
LANE CONFIGURATIONS AND CONTROL
LEGEND
~
NC::::,FITI-I
NlS 196171000
• Study Area Key Intersection
[I] Signalized Intersection
8 Stop Controlled Approach
"7 Yield Controlled Approach ---Improvement
' 100, Turn Lane Length (feet)
FIGURE 11
Kimley >>> Horn
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit Page 23
6.0 CONCLUSIONS AND RECOMMENDATIONS
Based on the analysis presented in this report, Kimley-Horn believes North Hangs Pit will be
successfully incorporated into the existing and future roadway network without the need for any
traffic improvements. All project intersections are expected to operate acceptably throughout the
2037 study horizon with their existing lane configuration and control.
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit
APPENDICES
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit
APPENDIX A
Intersection Count Sheets
www.idaxdata.com
to
to
Two-Hour Count Summaries
Note: Two-hour count summary volumes include heavy vehicles but exclude bicycles in overall count.
Total
0
0
0
1
0
0
0
0
1
0
WB 0.0%0.38
NB 0.0%0.36
Peak Hour: 8:00 AM 9:00 AM
HV %:PHF
EB 0.0%0.50
Date: 03/10/2021
Peak Hour Count Period: 7:00 AM 9:00 AM
UT LT TH RT
Interval
Start
CR 316 FRONTAGE RD CR 316 FRONTAGE RD CR 315 0 15-min
TotalUTLTTHRT
SB --
TOTAL 0.0%0.43
TH RT
7:00 AM 0 0 1 0 0 0 0
UT LT TH RT UT LT
Rolling
One HourEastboundWestboundNorthboundSouthbound
0 0 1 0 0 0
0 0 0 3 0
7:15 AM 0 0 0 2
0 0 2 0 0 0
0 0 0 1 0
7:45 AM 0 0 0 0
0 0 0 0 0 0
4 0
7:30 AM 0 0 0 0 0 1 0
0 1 0 0 0 0
1 9
8:00 AM 0 0 0 0 0 1 0
0 0 0 0 0 0000001
0 0 0 0 0 1
0 0 0 2 8
8:15 AM 0 0 0 1
0 0 0 0 1 0
0 0 0 3 8
8:45 AM 0 0 0 1
0 0 1 0 0 0
2 6
8:30 AM 0 0 0 2 0 0 0
0 0 0 0 0 0
10 17030000011004
Count Total 0 0 1 6 0 3 2 0 0 0 26 0
Peak
Hour
All 0 0 0
0 0 9 0 5 0
0 0 0 0 0 0000000
0 17 0
HV 0 0 0 0 0 0
6 0 4 0 0 0402100
0
Interval
Start
Heavy Vehicle Totals Bicycles Pedestrians (Crossing Leg)
EB WB NB SB Total
0%----0%0%0%--0%-HV%---0%-
0 0
7:15 AM 1 0 0 0 1 0 0
0 0 0 0 0 0
West North South
7:00 AM 0 0 0 0 0 0
EB WB NB SB Total East
7:45 AM 0 0 1 0 1
0 0 0 0 0 0
0
7:30 AM 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0
8:15 AM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 1
8:00 AM 0 0 0 0 0 0
0 0 0 0 0 0
8:45 AM 0 0 0 0 0
0 0 0 0 0 0
0
8:30 AM 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0000000
0 1
Peak Hr 0 0 0 0 0 0 0
0 0 0 0 0 0Count Total 1 0 1 0 2 0
0000000
0
0
000
0
0
00 0N
CR 315
CR 316 FRONTAGE RD
CR 316
FRONTAGE RD
CR 315CR 316
FRONTAGE RD
17TEV:
0.43PHF:
1
2 3
40
4610604
04
7
0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
..... ::, r ( (
) ) .... C:
:, n+i ,.. ,, 'I
1 i
I
I
www.idaxdata.com
Two-Hour Count Summaries - Heavy Vehicles
Two-Hour Count Summaries - Bikes
Note: U-Turn volumes for bikes are included in Left-Turn, if any.
Northbound Southbound
UT LT TH RT UT LT TH RT
Interval
Start
CR 316 FRONTAGE RD CR 316 FRONTAGE RD CR 315 0 15-min
Total
Rolling
One HourEastboundWestbound
0 0 0 0 0
7:15 AM 0 0 0 1
0 0 0 0 0 0
TH RT
7:00 AM 0 0 0 0 0 0 0
UT LT TH RT UT LT
1 0
7:30 AM 0 0 0 0 0 0 0
0 0 0 0 0 0000000
0 0 0 0 0 1
0 0 0 0 0
7:45 AM 0 0 0 0
0 0 0 0 0 0
0 0 0 0 2
8:15 AM 0 0 0 0
0 0 0 0 0 0
1 2
8:00 AM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 1
8:30 AM 0 0 0 0 0 0 0
0 0 0 0 0 0000000
0 0 0 0 0 0
0 0 0 0 1
8:45 AM 0 0 0 0
0 0 0 0 0 0
0 0000000
0 0 0 2 0
Peak Hour 0 0 0 0
0 0 1 0 0 0Count Total 0 0 0 1 0 0 0
Westbound Northbound Southbound
LT TH RT LT TH RT LT
0 0
Interval
Start
CR 316 FRONTAGE RD CR 316 FRONTAGE RD CR 315 0 15-min
Total
Rolling
One HourEastbound
0 0 0 0 0 0000000
0 0 0 0
7:15 AM 0 0 0 0 0
0 0 0 0 0 0
TH RT LT TH RT
7:00 AM 0 0 0 0
0 0
7:45 AM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0
7:30 AM 0 0 0 0 0 0
0 0 0 0 0 0
8:15 AM 0 0 0 0 0
0 0 0 0 0 0
0
8:00 AM 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0
8:45 AM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0
8:30 AM 0 0 0 0 0 0
0 0 0 0 0 0
0000000
Count Total 0 0 0 0 0 0 0 0
0 0 0000000Peak Hour 0 0 0 0 0
0 0 0 0 0 0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
I
I
www.idaxdata.com
to
to
Two-Hour Count Summaries
Note: Two-hour count summary volumes include heavy vehicles but exclude bicycles in overall count.
Total
0
0
0
0
0
0
0
0
0
0
WB 50.0%0.50
NB 0.0%0.50
Peak Hour: 4:30 PM 5:30 PM
HV %:PHF
EB 0.0%0.33
Date: 03/09/2021
Peak Hour Count Period: 4:00 PM 6:00 PM
UT LT TH RT
Interval
Start
CR 316 FRONTAGE RD CR 316 FRONTAGE RD CR 315 0 15-min
TotalUTLTTHRT
SB --
TOTAL 10.0%0.50
TH RT
4:00 PM 0 0 1 0 0 1 0
UT LT TH RT UT LT
Rolling
One HourEastboundWestboundNorthboundSouthbound
0 0 0 0 0 0
0 0 0 2 0
4:15 PM 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0
4:45 PM 0 0 0 0
0 0 0 0 0 0
0 0
4:30 PM 0 0 0 0 0 0 0
0 0 0 0 0 0
2 4
5:00 PM 0 0 0 1 0 0 0
0 0 0 0 0 0001001
0 0 1 0 0 0
0 0 0 3 5
5:15 PM 0 0 0 3
0 0 2 0 0 0
0 0 0 0 10
5:45 PM 0 0 0 0
0 0 0 0 0 0
5 10
5:30 PM 0 0 0 0 0 0 0
0 1 0 0 0 0
2 10000000000002
Count Total 0 0 1 4 0 1 2 0 0 0 14 0
Peak
Hour
All 0 0 0
0 0 5 0 1 0
0 0 0 0 1 0100000
0 10 0
HV 0 0 0 0 0 0
3 0 1 0 0 0400200
0
Interval
Start
Heavy Vehicle Totals Bicycles Pedestrians (Crossing Leg)
EB WB NB SB Total
0%----10%-50%--0%-HV%---0%-
0 0
4:15 PM 0 0 0 0 0 0 0
0 0 0 0 0 0
West North South
4:00 PM 0 0 0 0 0 0
EB WB NB SB Total East
4:45 PM 0 1 0 0 1
0 0 0 0 0 0
0
4:30 PM 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0
5:15 PM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0
5:00 PM 0 0 0 0 0 0
0 0 0 0 0 0
5:45 PM 0 0 1 0 1
0 0 0 0 0 0
0
5:30 PM 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0000000
0 0
Peak Hr 0 1 0 0 1 0 0
0 0 0 0 0 0Count Total 0 1 1 0 2 0
0000000
0
0
000
0
0
00 0N
CR 315
CR 316 FRONTAGE RD
CR 316
FRONTAGE RD
CR 315CR 316
FRONTAGE RD
10TEV:
0.5PHF:
2
0 2
10
134404
04
5
0
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Two-Hour Count Summaries - Heavy Vehicles
Two-Hour Count Summaries - Bikes
Note: U-Turn volumes for bikes are included in Left-Turn, if any.
Northbound Southbound
UT LT TH RT UT LT TH RT
Interval
Start
CR 316 FRONTAGE RD CR 316 FRONTAGE RD CR 315 0 15-min
Total
Rolling
One HourEastboundWestbound
0 0 0 0 0
4:15 PM 0 0 0 0
0 0 0 0 0 0
TH RT
4:00 PM 0 0 0 0 0 0 0
UT LT TH RT UT LT
0 0
4:30 PM 0 0 0 0 0 0 0
0 0 0 0 0 0000000
0 0 1 0 0 0
0 0 0 0 0
4:45 PM 0 0 0 0
0 0 0 0 0 0
0 0 0 0 1
5:15 PM 0 0 0 0
0 0 0 0 0 0
1 1
5:00 PM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 1
5:30 PM 0 0 0 0 0 0 0
0 0 0 0 0 0000000
0 0 0 0 0 1
0 0 0 0 1
5:45 PM 0 0 0 0
0 0 0 0 0 0
1 1000000
0 0 0 2 0
Peak Hour 0 0 0 0
0 0 1 0 0 0Count Total 0 0 0 0 0 0 1
Westbound Northbound Southbound
LT TH RT LT TH RT LT
1 0
Interval
Start
CR 316 FRONTAGE RD CR 316 FRONTAGE RD CR 315 0 15-min
Total
Rolling
One HourEastbound
0 0 0 0 0 0001000
0 0 0 0
4:15 PM 0 0 0 0 0
0 0 0 0 0 0
TH RT LT TH RT
4:00 PM 0 0 0 0
0 0
4:45 PM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0
4:30 PM 0 0 0 0 0 0
0 0 0 0 0 0
5:15 PM 0 0 0 0 0
0 0 0 0 0 0
0
5:00 PM 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0
5:45 PM 0 0 0 0 0 0 0
0 0 0 0 0 0
0 0 0
5:30 PM 0 0 0 0 0 0
0 0 0 0 0 0
0000000
Count Total 0 0 0 0 0 0 0 0
0 0 0000000Peak Hour 0 0 0 0 0
0 0 0 0 0 0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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to
Two-Hour Count Summaries
Note: Two-hour count summary volumes include heavy vehicles but exclude bicycles in overall count.
Total
0
0
0
0
0
0
0
0
0
00000000
0 0
Peak Hour 0 12 6 1 19 0 0
0 0 0 0 0 0Count Total 0 19 7 1 27 0
0 0 00000008:45 AM 0 0 0 0 0
0 0 0 0 0 0
0
8:30 AM 0 2 1 0 3 0 0 0
0 0 0 0 0 0
0 0
8:15 AM 0 2 0 0 2 0 0
0 0 0 0 0 0
0 0 0
8:00 AM 0 3 1 0 4 0
0 0 0 0 0 0
0 0 0
0
7:30 AM 0 3 3 0 6 0 0 0
0 0 0 0 0 0
0 3 0
EB WB NB SB Total East
7:45 AM 0 1 0 1 2
0 0 0
-21%0%HV%-----
0 0
7:15 AM 0 5 2 0 7 0 0
0 0 0 0 0 0
West North South
7:00 AM 0 3 0
9
28 3 0 0 0 00057410
0
Interval
Start
Heavy Vehicle Totals Bicycles Pedestrians (Crossing Leg)
EB WB NB SB Total
----25%20%16%50%100%
Peak
Hour
All 0 0 0
1 0 42 12 0 0
0 0 0 1 19 0210600
4 97 0
HV 0 0 0 0 0
Count Total 0 0 0 0 0 96 5 0 0 9 165 0
18 84500001081003
0 0 2 16 83
8:45 AM 0 0 0 0
0 0 4 2 0 0
19 93
8:30 AM 0 0 0 0 0 8 0
1 0 0 0 0 10130004
0 0 1 31 97
8:15 AM 0 0 0 0
0 0 3 2 0 0
17 81
8:00 AM 0 0 0 0 0 24 1
0 0 0 0 0 2091005
0 0 1 26 0
7:45 AM 0 0 0 0
1 0 9 0 0 0
23 0
7:30 AM 0 0 0 0 0 14 1
1 0 0 0 0 001010011
0 0 1 15 0
7:15 AM 0 0 0 0
0 0 3 1 0 07:00 AM 0 0 0 0 0 10 0
UT LT TH RT UT LT
Rolling
One HourEastboundWestboundNorthboundSouthbound
UT LT TH RT
Interval
Start
I-70 WB RAMP I-70 WB RAMP CR 315 CR 315 15-min
TotalUTLTTHRT
Date: 03/11/2021
Peak Hour Count Period: 7:00 AM 9:00 AM
SB 25.0%0.50
TOTAL 19.6%0.78
TH RT
WB 19.4%0.62
NB 19.4%0.65
Peak Hour: 7:15 AM 8:15 AM
HV %:PHF
EB --
0
0
0 0000000
0
0
0
00 0N
CR 315
I-70 WB RAMP
I-70 WB RAMP
CR 315I-70 WB RAMP CR 31597TEV:
0.78PHF:4004401
4
57
62
00
0328315700
0
0
0
36 0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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Two-Hour Count Summaries - Heavy Vehicles
Two-Hour Count Summaries - Bikes
Note: U-Turn volumes for bikes are included in Left-Turn, if any.
0 0
0 0 0
0 0 0
0 0 0
0 0 0
000 0 0 0
000 0 0 0
0000
0
0
0
00
0
THLT
00000000
0
00
0
0
0 0 0
0 0 0
0
THLT
0000000
0 00000
0 0
0 0
Peak Hour
0 0Count Total
0
000000000
0 0
8:45 AM
0 0 0 0
0
8:30 AM
0000000
0 0
8:15 AM
0 0 0
0 0 0
0 0 0
0 0 0
0
8:00 AM
0000
0 0
7:45 AM
0 0 0 0
0
7:30 AM
00000007:15 AM 0
0 0
0 0 0
0 07:00 AM
RT
19 0
Interval
Start
I-70 WB RAMP I-70 WB RAMP CR 315 CR 315 15-min
Total
Rolling
One Hour
0 0 0 0 0 1092106
RTTHLT RTTHLTRT
0 0 1 27 0
Peak Hour 0 0 0 0
1 0 7 0 0 0Count Total 0 0 0 0 0 16 2
0 9000000000000
0 0 0 3 11
8:45 AM 0 0 0 0
0 0 1 0 0 0
2 14
8:30 AM 0 0 0 0 0 2 0
0 0 0 0 0 0020000
0 0 0 4 19
8:15 AM 0 0 0 0
0 0 1 0 0 0
2 18
8:00 AM 0 0 0 0 0 3 0
0 0 0 0 0 1010000
0 0 0 6 0
7:45 AM 0 0 0 0
1 0 3 0 0 0
7 0
7:30 AM 0 0 0 0 0 1 1
0 0 0 0 0 0041002
0 0 0 3 0
7:15 AM 0 0 0 0
0 0 0 0 0 0
TH RT
7:00 AM 0 0 0 0 0 3 0
UT LT TH RT UT LT
Northbound Southbound
UT LT TH RT UT LT TH RT
Interval
Start
I-70 WB RAMP I-70 WB RAMP CR 315 CR 315 15-min
Total
Rolling
One HourEastboundWestbound
SouthboundNorthboundWestboundEastbound
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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to
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Two-Hour Count Summaries
Note: Two-hour count summary volumes include heavy vehicles but exclude bicycles in overall count.
Total
0
0
0
0
0
0
0
0
0
00000000
0 0
Peak Hour 0 7 8 0 15 0 0
0 0 0 0 0 0Count Total 0 15 10 0 25 0
0 0 00000005:45 PM 0 3 1 0 4
0 0 0 0 0 0
0
5:30 PM 0 2 3 0 5 0 0 0
0 0 0 0 0 0
0 0
5:15 PM 0 0 2 0 2 0 0
0 0 0 0 0 0
0 0 0
5:00 PM 0 2 2 0 4 0
0 0 0 0 0 0
0 0 0
0
4:30 PM 0 1 1 0 2 0 0 0
0 0 0 0 0 0
0 3 0
EB WB NB SB Total East
4:45 PM 0 2 0 0 2
0 0 0
-23%33%HV%-----
0 0
4:15 PM 0 3 0 0 3 0 0
0 0 0 0 0 0
West North South
4:00 PM 0 2 1
6
31 3 0 0 0 40077220
0
Interval
Start
Heavy Vehicle Totals Bicycles Pedestrians (Crossing Leg)
EB WB NB SB Total
---0%-13%8%50%0%
Peak
Hour
All 0 0 0
2 0 65 4 0 0
0 0 0 0 15 0100710
0 119 0
HV 0 0 0 0 0
Count Total 0 0 0 0 0 150 6 0 4 1 232 0
29 1191000000230104
0 0 0 23 112
5:45 PM 0 0 0 0
0 0 8 0 0 0
36 118
5:30 PM 0 0 0 0 0 13 2
1 0 0 0 3 002000012
0 1 0 31 115
5:15 PM 0 0 0 0
1 0 7 1 0 0
22 113
5:00 PM 0 0 0 0 0 21 0
1 0 0 0 0 00121008
0 0 0 29 0
4:45 PM 0 0 0 0
0 0 11 0 0 0
33 0
4:30 PM 0 0 0 0 0 17 1
0 0 0 0 0 00241008
0 0 1 29 0
4:15 PM 0 0 0 0
0 0 7 0 0 04:00 PM 0 0 0 0 0 20 1
UT LT TH RT UT LT
Rolling
One HourEastboundWestboundNorthboundSouthbound
UT LT TH RT
Interval
Start
I-70 WB RAMP I-70 WB RAMP CR 315 CR 315 15-min
TotalUTLTTHRT
Date: 03/09/2021
Peak Hour Count Period: 4:00 PM 6:00 PM
SB 0.0%0.33
TOTAL 12.6%0.83
TH RT
WB 8.6%0.84
NB 23.5%0.65
Peak Hour: 5:00 PM 6:00 PM
HV %:PHF
EB --
0
0
0 0000000
0
0
0
00 0N
CR 315
I-70 WB RAMP
I-70 WB RAMP
CR 315I-70 WB RAMP CR 315119TEV:
0.83PHF:0404502
2
77
81
00
0331348100
0
0
0
33 0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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Two-Hour Count Summaries - Heavy Vehicles
Two-Hour Count Summaries - Bikes
Note: U-Turn volumes for bikes are included in Left-Turn, if any.
0 0
0 0 0
0 0 0
0 0 0
0 0 0
000 0 0 0
000 0 0 0
0000
0
0
0
00
0
THLT
00000000
0
00
0
0
0 0 0
0 0 0
0
THLT
0000000
0 00000
0 0
0 0
Peak Hour
0 0Count Total
0
000000000
0 0
5:45 PM
0 0 0 0
0
5:30 PM
0000000
0 0
5:15 PM
0 0 0
0 0 0
0 0 0
0 0 0
0
5:00 PM
0000
0 0
4:45 PM
0 0 0 0
0
4:30 PM
00000004:15 PM 0
0 0
0 0 0
0 04:00 PM
RT
15 0
Interval
Start
I-70 WB RAMP I-70 WB RAMP CR 315 CR 315 15-min
Total
Rolling
One Hour
1 0 0 0 0 0061007
RTTHLT RTTHLTRT
0 0 0 25 0
Peak Hour 0 0 0 0
0 0 9 1 0 0Count Total 0 0 0 0 0 13 2
4 15100000030000
0 0 0 5 13
5:45 PM 0 0 0 0
0 0 3 0 0 0
2 10
5:30 PM 0 0 0 0 0 1 1
0 0 0 0 0 0000002
0 0 0 4 11
5:15 PM 0 0 0 0
0 0 2 0 0 0
2 10
5:00 PM 0 0 0 0 0 2 0
0 0 0 0 0 0011000
0 0 0 2 0
4:45 PM 0 0 0 0
0 0 1 0 0 0
3 0
4:30 PM 0 0 0 0 0 1 0
0 0 0 0 0 0030000
0 0 0 3 0
4:15 PM 0 0 0 0
0 0 1 0 0 0
TH RT
4:00 PM 0 0 0 0 0 2 0
UT LT TH RT UT LT
Northbound Southbound
UT LT TH RT UT LT TH RT
Interval
Start
I-70 WB RAMP I-70 WB RAMP CR 315 CR 315 15-min
Total
Rolling
One HourEastboundWestbound
SouthboundNorthboundWestboundEastbound
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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to
Two-Hour Count Summaries
Note: Two-hour count summary volumes include heavy vehicles but exclude bicycles in overall count.
Total
0
0
0
0
0
0
0
0
0
00000000
0 0
Peak Hour 4 0 13 9 26 0 0
0 0 0 0 0 0Count Total 5 0 21 16 42 0
0 0 00000008:45 AM 0 0 3 1 4
0 0 0 0 0 0
0
8:30 AM 1 0 1 1 3 0 0 0
0 0 0 0 0 0
0 0
8:15 AM 0 0 2 3 5 0 0
0 0 0 0 0 0
0 0 0
8:00 AM 1 0 1 2 4 0
0 0 0 0 0 0
0 0 0
0
7:30 AM 0 0 2 2 4 0 0 0
0 0 0 0 0 0
2 4 0
EB WB NB SB Total East
7:45 AM 2 0 7 3 12
0 0 0
--9%HV%-50%0%4%-
0 0
7:15 AM 1 0 3 2 6 0 0
0 0 0 0 0 0
West North South
7:00 AM 0 0 2
0
0 23 47 0 1 542300000
0
Interval
Start
Heavy Vehicle Totals Bicycles Pedestrians (Crossing Leg)
EB WB NB SB Total
23%-0%17%-17%---
Peak
Hour
All 0 6 2
0 0 0 45 92 0
0 0 9 0 26 00000211
0 156 0
HV 0 3 0 1 0
Count Total 0 9 2 35 0 0 0 2 96 0 281 0
33 1316120090000000
0 14 0 34 148
8:45 AM 0 3 0 3
0 0 0 7 10 0
32 154
8:30 AM 0 0 0 3 0 0 0
3 11 0 0 14 0000000
0 16 0 32 156
8:15 AM 0 0 0 4
0 0 0 2 8 0
50 150
8:00 AM 0 1 1 4 0 0 0
6 14 0 0 19 0000000
0 11 0 40 0
7:45 AM 0 1 0 10
0 0 0 9 11 0
34 0
7:30 AM 0 1 1 7 0 0 0
6 14 0 1 8 0000000
1 5 0 26 0
7:15 AM 0 3 0 2
0 0 0 6 12 07:00 AM 0 0 0 2 0 0 0
UT LT TH RT UT LT
Rolling
One HourEastboundWestboundNorthboundSouthbound
UT LT TH RT
Interval
Start
I-70 EB RAMP I-70 EB RAMP CR 315 CR 315 15-min
TotalUTLTTHRT
Date: 03/10/2021
Peak Hour Count Period: 7:00 AM 9:00 AM
SB 16.4%0.72
TOTAL 16.7%0.78
TH RT
WB --
NB 18.6%0.88
Peak Hour: 7:15 AM 8:15 AM
HV %:PHF
EB 12.9%0.70
0
0
0 0000000
0
0
0
00 0N
CR 315
I-70 EB RAMP
I-70 EB RAMP
CR 315I-70 EB RAMP CR 315156TEV:
0.78PHF:0541552900
0
0
0
500
472307077023
2
6
31
0 0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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Two-Hour Count Summaries - Heavy Vehicles
Two-Hour Count Summaries - Bikes
Note: U-Turn volumes for bikes are included in Left-Turn, if any.
0 0
0 0 0
0 0 0
0 0 0
0 0 0
000 0 0 0
000 0 0 0
0000
0
0
0
00
0
THLT
00000000
0
00
0
0
0 0 0
0 0 0
0
THLT
0000000
0 00000
0 0
0 0
Peak Hour
0 0Count Total
0
000000000
0 0
8:45 AM
0 0 0 0
0
8:30 AM
0000000
0 0
8:15 AM
0 0 0
0 0 0
0 0 0
0 0 0
0
8:00 AM
0000
0 0
7:45 AM
0 0 0 0
0
7:30 AM
00000007:15 AM 0
0 0
0 0 0
0 07:00 AM
RT
26 0
Interval
Start
I-70 EB RAMP I-70 EB RAMP CR 315 CR 315 15-min
Total
Rolling
One Hour
2 11 0 0 9 0000000
RTTHLT RTTHLTRT
0 16 0 42 0
Peak Hour 0 3 0 1
0 0 0 4 17 0Count Total 0 3 0 2 0 0 0
4 16030010000000
0 1 0 3 24
8:45 AM 0 0 0 0
0 0 0 1 0 0
5 25
8:30 AM 0 0 0 1 0 0 0
0 2 0 0 3 0000000
0 2 0 4 26
8:15 AM 0 0 0 0
0 0 0 0 1 0
12 26
8:00 AM 0 1 0 0 0 0 0
2 5 0 0 3 0000000
0 2 0 4 0
7:45 AM 0 1 0 1
0 0 0 0 2 0
6 0
7:30 AM 0 0 0 0 0 0 0
0 3 0 0 2 0000000
0 2 0 4 0
7:15 AM 0 1 0 0
0 0 0 1 1 0
TH RT
7:00 AM 0 0 0 0 0 0 0
UT LT TH RT UT LT
Northbound Southbound
UT LT TH RT UT LT TH RT
Interval
Start
I-70 EB RAMP I-70 EB RAMP CR 315 CR 315 15-min
Total
Rolling
One HourEastboundWestbound
SouthboundNorthboundWestboundEastbound
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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to
Two-Hour Count Summaries
Note: Two-hour count summary volumes include heavy vehicles but exclude bicycles in overall count.
Total
0
0
0
0
0
0
0
0
0
00000000
0 0
Peak Hour 1 0 6 6 13 0 0
0 0 0 0 0 0Count Total 6 0 10 13 29 0
0 0 00000005:45 PM 1 0 1 2 4
0 0 0 0 0 0
0
5:30 PM 1 0 3 1 5 0 0 0
0 0 0 0 0 0
0 0
5:15 PM 0 0 2 1 3 0 0
0 0 0 0 0 0
0 0 0
5:00 PM 1 0 2 2 5 0
0 0 0 0 0 0
0 0 0
0
4:30 PM 0 0 2 2 4 0 0 0
0 0 0 0 0 0
1 3 0
EB WB NB SB Total East
4:45 PM 0 0 0 1 1
0 0 0
--14%HV%-0%-3%-
0 0
4:15 PM 1 0 0 3 4 0 0
0 0 0 0 0 0
West North South
4:00 PM 2 0 0
0
0 35 71 0 1 733000000
0
Interval
Start
Heavy Vehicle Totals Bicycles Pedestrians (Crossing Leg)
EB WB NB SB Total
1%-0%8%-6%---
Peak
Hour
All 0 3 0
0 0 0 60 106 0
0 0 6 0 13 0000051
0 213 0
HV 0 0 0 1 0
Count Total 0 9 0 55 0 0 0 2 152 0 384 0
44 1884900230000000
0 13 0 31 196
5:45 PM 0 2 0 6
0 0 0 6 5 0
56 213
5:30 PM 0 2 0 5 0 0 0
12 11 0 1 22 0000000
0 22 0 57 212
5:15 PM 0 1 0 9
0 0 0 7 20 0
52 196
5:00 PM 0 0 0 8 0 0 0
7 21 0 0 12 0000000
0 17 0 48 0
4:45 PM 0 2 0 10
0 0 0 9 19 0
55 0
4:30 PM 0 0 0 3 0 0 0
9 11 0 1 24 0000000
0 19 0 41 0
4:15 PM 0 1 0 9
0 0 0 6 10 04:00 PM 0 1 0 5 0 0 0
UT LT TH RT UT LT
Rolling
One HourEastboundWestboundNorthboundSouthbound
UT LT TH RT
Interval
Start
I-70 EB RAMP I-70 EB RAMP CR 315 CR 315 15-min
TotalUTLTTHRT
Date: 03/09/2021
Peak Hour Count Period: 4:00 PM 6:00 PM
SB 8.1%0.80
TOTAL 6.1%0.93
TH RT
WB --
NB 5.7%0.95
Peak Hour: 4:30 PM 5:30 PM
HV %:PHF
EB 3.0%0.69
0
0
0 0000000
0
0
0
00 0N
CR 315
I-70 EB RAMP
I-70 EB RAMP
CR 315I-70 EB RAMP CR 315213TEV:
0.93PHF:0731743800
0
0
0
720
71350106103030
0
3
33
0 0
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
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Two-Hour Count Summaries - Heavy Vehicles
Two-Hour Count Summaries - Bikes
Note: U-Turn volumes for bikes are included in Left-Turn, if any.
0 0
0 0 0
0 0 0
0 0 0
0 0 0
000 0 0 0
000 0 0 0
0000
0
0
0
00
0
THLT
00000000
0
00
0
0
0 0 0
0 0 0
0
THLT
0000000
0 00000
0 0
0 0
Peak Hour
0 0Count Total
0
000000000
0 0
5:45 PM
0 0 0 0
0
5:30 PM
0000000
0 0
5:15 PM
0 0 0
0 0 0
0 0 0
0 0 0
0
5:00 PM
0000
0 0
4:45 PM
0 0 0 0
0
4:30 PM
00000004:15 PM 0
0 0
0 0 0
0 04:00 PM
RT
13 0
Interval
Start
I-70 EB RAMP I-70 EB RAMP CR 315 CR 315 15-min
Total
Rolling
One Hour
5 1 0 0 6 0000000
RTTHLT RTTHLTRT
0 13 0 29 0
Peak Hour 0 0 0 1
0 0 0 7 3 0Count Total 0 3 0 3 0 0 0
4 17100020000000
0 1 0 5 14
5:45 PM 0 1 0 0
0 0 0 1 2 0
3 13
5:30 PM 0 1 0 0 0 0 0
2 0 0 0 1 0000000
0 2 0 5 14
5:15 PM 0 0 0 0
0 0 0 2 0 0
1 12
5:00 PM 0 0 0 1 0 0 0
0 0 0 0 1 0000000
0 2 0 4 0
4:45 PM 0 0 0 0
0 0 0 1 1 0
4 0
4:30 PM 0 0 0 0 0 0 0
0 0 0 0 3 0000000
0 1 0 3 0
4:15 PM 0 0 0 1
0 0 0 0 0 0
TH RT
4:00 PM 0 1 0 1 0 0 0
UT LT TH RT UT LT
Northbound Southbound
UT LT TH RT UT LT TH RT
Interval
Start
I-70 EB RAMP I-70 EB RAMP CR 315 CR 315 15-min
Total
Rolling
One HourEastboundWestbound
SouthboundNorthboundWestboundEastbound
Project Manager: (415) 310-6469 project.manager.ca@idaxdata.com
I
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Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit
APPENDIX B
Trip Generation Worksheets
Type of Material Sales Per Year Units Working Days Truck Capacity Units Round Trips Per Day
Aggregate 100,000 Tons 260 25 Tons 16
Ready Mix Concrete 12,000 CY 260 8 CY 6I I I I
Kimley-Horn and Associates, Inc.
196171000 – North Hangs Pit
APPENDIX C
Intersection Analysis Works heets
HCM 6th TWSC 2021 Existing AM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 5.9
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 4 2 1 0 6 0 4 0 0 0
Future Vol, veh/h 0 0 4 2 1 0 6 0 4 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 43 43 43 43 92 43 92 43 92 92 92
Heavy Vehicles, % 2 2 2 2 2 2 2 2 2 2 2 2
Mvmt Flow 0 0 9 5 2 0 14 0 9 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 38 1 39 34 - 1 0 0 9 0 0
Stage 1 - 1 - 33 33 - - - - - - -
Stage 2 - 37 - 6 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.12 6.52 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.12 5.52 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.12 5.52 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.518 4.018 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 854 1084 966 859 0 1622 - - 1611 - -
Stage 1 0 895 - 983 868 0 - - - - - -
Stage 2 0 864 - 1016 895 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 846 1084 952 851 - 1622 - - 1611 - -
Mov Cap-2 Maneuver - 846 - 952 851 - - - - - - -
Stage 1 - 895 - 974 860 - - - - - - -
Stage 2 - 856 - 1007 895 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9 4.3 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 916 1611 - -
HCM Lane V/C Ratio 0.009 - - 0.009 0.008 - - -
HCM Control Delay (s)7.2 0 - 8.4 9 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 - - 0 0 0 - -
HCM 6th TWSC 2021 Existing PM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 7
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 4 0 2 0 3 0 1 0 0 0
Future Vol, veh/h 0 0 4 0 2 0 3 0 1 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 50 50 50 50 92 50 92 50 92 92 92
Heavy Vehicles, % 2 2 2 50 50 2 2 2 2 2 2 2
Mvmt Flow 0 0 8 0 4 0 6 0 2 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 15 1 18 14 - 1 0 0 2 0 0
Stage 1 - 1 - 13 13 - - - - - - -
Stage 2 - 14 - 5 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.6 7 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.6 6 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.6 6 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.95 4.45 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 879 1084 886 794 0 1622 - - 1620 - -
Stage 1 0 895 - 896 798 0 - - - - - -
Stage 2 0 884 - 906 808 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 875 1084 877 791 - 1622 - - 1620 - -
Mov Cap-2 Maneuver - 875 - 877 791 - - - - - - -
Stage 1 - 895 - 892 795 - - - - - - -
Stage 2 - 880 - 899 808 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.3 9.6 5.4 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 791 1620 - -
HCM Lane V/C Ratio 0.004 - - 0.007 0.005 - - -
HCM Control Delay (s)7.2 0 - 8.3 9.6 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 - - 0 0 0 - -
HCM 6th TWSC 2022 Background AM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 6.8
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 5 5 5 0 10 0 5 0 0 0
Future Vol, veh/h 0 0 5 5 5 0 10 0 5 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 43 43 43 43 92 43 92 43 92 92 92
Heavy Vehicles, % 2 2 2 2 2 2 2 2 2 2 2 2
Mvmt Flow 0 0 12 12 12 0 23 0 12 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 59 1 59 53 - 1 0 0 12 0 0
Stage 1 - 1 - 52 52 - - - - - - -
Stage 2 - 58 - 7 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.12 6.52 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.12 5.52 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.12 5.52 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.518 4.018 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 832 1084 937 838 0 1622 - - 1607 - -
Stage 1 0 895 - 961 852 0 - - - - - -
Stage 2 0 847 - 1015 895 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 820 1084 917 826 - 1622 - - 1607 - -
Mov Cap-2 Maneuver - 820 - 917 826 - - - - - - -
Stage 1 - 895 - 948 840 - - - - - - -
Stage 2 - 835 - 1004 895 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.3 4.8 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 869 1607 - -
HCM Lane V/C Ratio 0.014 - - 0.011 0.027 - - -
HCM Control Delay (s)7.3 0 - 8.4 9.3 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 - -0 0.1 0 - -
HCM 6th TWSC 2022 Background PM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 6.2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 5 0 5 0 5 0 5 0 0 0
Future Vol, veh/h 0 0 5 0 5 0 5 0 5 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 50 50 50 50 92 50 92 50 92 92 92
Heavy Vehicles, % 2 2 2 50 50 2 2 2 2 2 2 2
Mvmt Flow 0 0 10 0 10 0 10 0 10 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 31 1 31 26 - 1 0 0 10 0 0
Stage 1 - 1 - 25 25 - - - - - - -
Stage 2 - 30 - 6 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.6 7 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.6 6 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.6 6 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.95 4.45 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 862 1084 868 782 0 1622 - - 1610 - -
Stage 1 0 895 - 883 788 0 - - - - - -
Stage 2 0 870 - 904 808 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 857 1084 856 777 - 1622 - - 1610 - -
Mov Cap-2 Maneuver - 857 - 856 777 - - - - - - -
Stage 1 - 895 - 878 783 - - - - - - -
Stage 2 - 865 - 896 808 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.7 3.6 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 777 1610 - -
HCM Lane V/C Ratio 0.006 - - 0.009 0.013 - - -
HCM Control Delay (s)7.2 0 - 8.4 9.7 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 - - 0 0 0 - -
HCM 6th TWSC 2022 Total AM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 6.9
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 5 5 5 0 10 0 5 0 0 0
Future Vol, veh/h 0 0 5 5 5 0 10 0 5 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 43 43 43 43 92 43 92 43 92 92 92
Heavy Vehicles, % 2 2 2 42 2 2 2 2 10 2 2 2
Mvmt Flow 0 0 12 12 12 0 23 0 12 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 59 1 59 53 - 1 0 0 12 0 0
Stage 1 - 1 - 52 52 - - - - - - -
Stage 2 - 58 - 7 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.52 6.52 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.52 5.52 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.52 5.52 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.878 4.018 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 832 1084 847 838 0 1622 - - 1607 - -
Stage 1 0 895 - 869 852 0 - - - - - -
Stage 2 0 847 - 920 895 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 820 1084 829 826 - 1622 - - 1607 - -
Mov Cap-2 Maneuver - 820 - 829 826 - - - - - - -
Stage 1 - 895 - 857 840 - - - - - - -
Stage 2 - 835 - 910 895 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.5 4.8 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 827 1607 - -
HCM Lane V/C Ratio 0.014 - - 0.011 0.028 - - -
HCM Control Delay (s)7.3 0 - 8.4 9.5 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 - -0 0.1 0 - -
HCM 6th TWSC 2022 Total PM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 5.9
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 5 15 5 0 5 0 15 0 0 0
Future Vol, veh/h 0 0 5 15 5 0 5 0 15 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 50 50 50 50 92 50 92 50 92 92 92
Heavy Vehicles, % 2 2 2 50 50 2 2 2 41 2 2 2
Mvmt Flow 0 0 10 30 10 0 10 0 30 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 51 1 41 36 - 1 0 0 30 0 0
Stage 1 - 1 - 35 35 - - - - - - -
Stage 2 - 50 - 6 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.6 7 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.6 6 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.6 6 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.95 4.45 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 840 1084 855 771 0 1622 - - 1583 - -
Stage 1 0 895 - 871 780 0 - - - - - -
Stage 2 0 853 - 904 808 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 835 1084 843 766 - 1622 - - 1583 - -
Mov Cap-2 Maneuver - 835 - 843 766 - - - - - - -
Stage 1 - 895 - 866 775 - - - - - - -
Stage 2 - 848 - 896 808 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.6 1.8 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 822 1583 - -
HCM Lane V/C Ratio 0.006 - - 0.009 0.049 - - -
HCM Control Delay (s)7.2 0 - 8.4 9.6 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 - -0 0.2 0 - -
HCM 6th TWSC 2037 Background AM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 6.2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 10 5 5 0 10 0 10 0 0 0
Future Vol, veh/h 0 0 10 5 5 0 10 0 10 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 43 43 43 43 92 43 92 43 92 92 92
Heavy Vehicles, % 2 2 2 2 2 2 2 2 2 2 2 2
Mvmt Flow 0 0 23 12 12 0 23 0 23 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 70 1 71 59 - 1 0 0 23 0 0
Stage 1 - 1 - 58 58 - - - - - - -
Stage 2 - 69 - 13 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.12 6.52 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.12 5.52 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.12 5.52 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.518 4.018 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 821 1084 920 832 0 1622 - - 1592 - -
Stage 1 0 895 - 954 847 0 - - - - - -
Stage 2 0 837 - 1007 895 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 810 1084 891 820 - 1622 - - 1592 - -
Mov Cap-2 Maneuver - 810 - 891 820 - - - - - - -
Stage 1 - 895 - 941 835 - - - - - - -
Stage 2 - 825 - 985 895 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.3 3.6 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 854 1592 - -
HCM Lane V/C Ratio 0.014 - - 0.021 0.027 - - -
HCM Control Delay (s)7.3 0 - 8.4 9.3 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 -- 0.1 0.1 0 - -
HCM 6th TWSC 2037 Background PM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 6.6
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 10 0 5 0 5 0 5 0 0 0
Future Vol, veh/h 0 0 10 0 5 0 5 0 5 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 50 50 50 50 92 50 92 50 92 92 92
Heavy Vehicles, % 2 2 2 50 50 2 2 2 2 2 2 2
Mvmt Flow 0 0 20 0 10 0 10 0 10 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 31 1 36 26 - 1 0 0 10 0 0
Stage 1 - 1 - 25 25 - - - - - - -
Stage 2 - 30 - 11 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.6 7 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.6 6 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.6 6 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.95 4.45 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 862 1084 861 782 0 1622 - - 1610 - -
Stage 1 0 895 - 883 788 0 - - - - - -
Stage 2 0 870 - 899 808 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 857 1084 841 777 - 1622 - - 1610 - -
Mov Cap-2 Maneuver - 857 - 841 777 - - - - - - -
Stage 1 - 895 - 878 783 - - - - - - -
Stage 2 - 865 - 882 808 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.7 3.6 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 777 1610 - -
HCM Lane V/C Ratio 0.006 - - 0.018 0.013 - - -
HCM Control Delay (s)7.2 0 - 8.4 9.7 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 -- 0.1 0 0 - -
HCM 6th TWSC 2037 Total AM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 5.4
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 10 15 5 0 10 0 25 0 0 0
Future Vol, veh/h 0 0 10 15 5 0 10 0 25 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 43 43 43 43 92 43 92 43 92 92 92
Heavy Vehicles, % 2 2 2 42 2 2 2 2 10 2 2 2
Mvmt Flow 0 0 23 35 12 0 23 0 58 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 105 1 88 76 - 1 0 0 58 0 0
Stage 1 - 1 - 75 75 - - - - - - -
Stage 2 - 104 - 13 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.52 6.52 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.52 5.52 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.52 5.52 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.878 4.018 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 785 1084 810 814 0 1622 - - 1546 - -
Stage 1 0 895 - 844 833 0 - - - - - -
Stage 2 0 809 - 913 895 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 773 1084 783 802 - 1622 - - 1546 - -
Mov Cap-2 Maneuver - 773 - 783 802 - - - - - - -
Stage 1 - 895 - 831 821 - - - - - - -
Stage 2 - 797 - 893 895 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.9 2.1 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 788 1546 - -
HCM Lane V/C Ratio 0.014 - - 0.021 0.059 - - -
HCM Control Delay (s)7.3 0 - 8.4 9.9 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 -- 0.1 0.2 0 - -
HCM 6th TWSC 2037 Total PM.syn
1: CR-315 & CR-316/Frontage Rd 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 6.2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 10 15 5 0 5 0 15 0 0 0
Future Vol, veh/h 0 0 10 15 5 0 5 0 15 0 0 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 92 50 50 50 50 92 50 92 50 92 92 92
Heavy Vehicles, % 2 2 2 50 50 2 2 2 41 2 2 2
Mvmt Flow 0 0 20 30 10 0 10 0 30 0 0 0
Major/Minor Minor2 Minor1 Major1 Major2
Conflicting Flow All - 51 1 46 36 - 1 0 0 30 0 0
Stage 1 - 1 - 35 35 - - - - - - -
Stage 2 - 50 - 11 1 - - - - - - -
Critical Hdwy - 6.52 6.22 7.6 7 - 4.12 - - 4.12 - -
Critical Hdwy Stg 1 - 5.52 - 6.6 6 - - - - - - -
Critical Hdwy Stg 2 - 5.52 - 6.6 6 - - - - - - -
Follow-up Hdwy - 4.018 3.318 3.95 4.45 - 2.218 - - 2.218 - -
Pot Cap-1 Maneuver 0 840 1084 848 771 0 1622 - - 1583 - -
Stage 1 0 895 - 871 780 0 - - - - - -
Stage 2 0 853 - 899 808 0 - - - - - -
Platoon blocked, %- - - -
Mov Cap-1 Maneuver - 835 1084 828 766 - 1622 - - 1583 - -
Mov Cap-2 Maneuver - 835 - 828 766 - - - - - - -
Stage 1 - 895 - 866 775 - - - - - - -
Stage 2 - 848 - 882 808 - - - - - - -
Approach EB WB NB SB
HCM Control Delay, s 8.4 9.7 1.8 0
HCM LOS A A
Minor Lane/Major Mvmt NBL NBT NBREBLn1WBLn1 SBL SBT SBR
Capacity (veh/h)1622 - - 1084 812 1583 - -
HCM Lane V/C Ratio 0.006 - - 0.018 0.049 - - -
HCM Control Delay (s)7.2 0 - 8.4 9.7 0 - -
HCM Lane LOS A A - A A A - -
HCM 95th %tile Q(veh) 0 -- 0.1 0.2 0 - -
HCM 6th TWSC 2021 Existing AM.syn
2: CR-315 & I-70 WB Ramps 03/22/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.3
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 57 4 1 28 3 0 0 0 4
Future Vol, veh/h 0 0 0 57 4 1 28 3 0 0 0 4
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, % 2 2 2 19 19 19 19 19 19 25 25 25
Mvmt Flow 0 0 0 73 5 1 36 4 0 0 0 5
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 79 81 4 5 0 - - - 0
Stage 1 76 76 - - - - - - -
Stage 2 3 5 - - - - - - -
Critical Hdwy 6.59 6.69 6.39 4.29 - - - - -
Critical Hdwy Stg 1 5.59 5.69 - - - - - - -
Critical Hdwy Stg 2 5.59 5.69 - - - - - - -
Follow-up Hdwy 3.671 4.171 3.471 2.371 - - - - -
Pot Cap-1 Maneuver 883 778 1032 1512 - 0 0 - -
Stage 1 906 800 - - - 0 0 - -
Stage 2 978 859 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 862 0 1032 1512 - - - - -
Mov Cap-2 Maneuver 862 0 - - - - - - -
Stage 1 884 0 - - - - - - -
Stage 2 978 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 9.6 6.7 0
HCM LOS A
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1512 - 864 - -
HCM Lane V/C Ratio 0.024 - 0.092 - -
HCM Control Delay (s)7.4 0 9.6 - -
HCM Lane LOS A A A - -
HCM 95th %tile Q(veh)0.1 - 0.3 - -
HCM 6th TWSC 2021 Existing PM.syn
2: CR-315 & I-70 WB Ramps 03/22/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.5
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 77 2 2 31 3 0 0 4 0
Future Vol, veh/h 0 0 0 77 2 2 31 3 0 0 4 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 83 83 83 83 83 83 83 83 83 83 83 83
Heavy Vehicles, % 2 2 2 9 9 9 24 24 24 2 2 2
Mvmt Flow 0 0 0 93 2 2 37 4 0 0 5 0
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 83 83 4 5 0 - - - 0
Stage 1 78 78 - - - - - - -
Stage 2 5 5 - - - - - - -
Critical Hdwy 6.49 6.59 6.29 4.34 - - - - -
Critical Hdwy Stg 1 5.49 5.59 - - - - - - -
Critical Hdwy Stg 2 5.49 5.59 - - - - - - -
Follow-up Hdwy 3.581 4.081 3.381 2.416 - - - - -
Pot Cap-1 Maneuver 902 794 1059 1484 - 0 0 - -
Stage 1 928 817 - - - 0 0 - -
Stage 2 1000 878 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 879 0 1059 1484 - - - - -
Mov Cap-2 Maneuver 879 0 - - - - - - -
Stage 1 905 0 - - - - - - -
Stage 2 1000 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 9.6 6.8 0
HCM LOS A
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1484 - 883 - -
HCM Lane V/C Ratio 0.025 - 0.111 - -
HCM Control Delay (s)7.5 0 9.6 - -
HCM Lane LOS A A A - -
HCM 95th %tile Q(veh)0.1 - 0.4 - -
HCM 6th TWSC 2022 Background AM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.1
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 60 5 5 30 5 0 0 0 5
Future Vol, veh/h 0 0 0 60 5 5 30 5 0 0 0 5
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, % 2 2 2 19 19 19 19 19 19 25 25 25
Mvmt Flow 0 0 0 77 6 6 38 6 0 0 0 6
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 85 88 6 6 0 - - - 0
Stage 1 82 82 - - - - - - -
Stage 2 3 6 - - - - - - -
Critical Hdwy 6.59 6.69 6.39 4.29 - - - - -
Critical Hdwy Stg 1 5.59 5.69 - - - - - - -
Critical Hdwy Stg 2 5.59 5.69 - - - - - - -
Follow-up Hdwy 3.671 4.171 3.471 2.371 - - - - -
Pot Cap-1 Maneuver 876 771 1029 1511 - 0 0 - -
Stage 1 900 795 - - - 0 0 - -
Stage 2 978 858 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 854 0 1029 1511 - - - - -
Mov Cap-2 Maneuver 854 0 - - - - - - -
Stage 1 878 0 - - - - - - -
Stage 2 978 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 9.6 6.4 0
HCM LOS A
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1511 - 865 - -
HCM Lane V/C Ratio 0.025 - 0.104 - -
HCM Control Delay (s)7.4 0 9.6 - -
HCM Lane LOS A A A - -
HCM 95th %tile Q(veh)0.1 - 0.3 - -
HCM 6th TWSC 2022 Background PM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.4
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 80 5 5 35 5 0 0 5 0
Future Vol, veh/h 0 0 0 80 5 5 35 5 0 0 5 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 83 83 83 83 83 83 83 83 83 83 83 83
Heavy Vehicles, % 2 2 2 9 9 9 24 24 24 2 2 2
Mvmt Flow 0 0 0 96 6 6 42 6 0 0 6 0
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 96 96 6 6 0 - - - 0
Stage 1 90 90 - - - - - - -
Stage 2 6 6 - - - - - - -
Critical Hdwy 6.49 6.59 6.29 4.34 - - - - -
Critical Hdwy Stg 1 5.49 5.59 - - - - - - -
Critical Hdwy Stg 2 5.49 5.59 - - - - - - -
Follow-up Hdwy 3.581 4.081 3.381 2.416 - - - - -
Pot Cap-1 Maneuver 887 781 1057 1482 - 0 0 - -
Stage 1 916 807 - - - 0 0 - -
Stage 2 999 877 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 862 0 1057 1482 - - - - -
Mov Cap-2 Maneuver 862 0 - - - - - - -
Stage 1 890 0 - - - - - - -
Stage 2 999 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 9.7 6.6 0
HCM LOS A
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1482 - 871 - -
HCM Lane V/C Ratio 0.028 - 0.124 - -
HCM Control Delay (s)7.5 0 9.7 - -
HCM Lane LOS A A A - -
HCM 95th %tile Q(veh)0.1 - 0.4 - -
HCM 6th TWSC 2022 Total AM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.1
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 60 5 5 30 5 0 0 0 5
Future Vol, veh/h 0 0 0 60 5 5 30 5 0 0 0 5
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, % 2 2 2 19 19 19 19 19 19 25 85 35
Mvmt Flow 0 0 0 77 6 6 38 6 0 0 0 6
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 85 88 6 6 0 - - - 0
Stage 1 82 82 - - - - - - -
Stage 2 3 6 - - - - - - -
Critical Hdwy 6.59 6.69 6.39 4.29 - - - - -
Critical Hdwy Stg 1 5.59 5.69 - - - - - - -
Critical Hdwy Stg 2 5.59 5.69 - - - - - - -
Follow-up Hdwy 3.671 4.171 3.471 2.371 - - - - -
Pot Cap-1 Maneuver 876 771 1029 1511 - 0 0 - -
Stage 1 900 795 - - - 0 0 - -
Stage 2 978 858 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 854 0 1029 1511 - - - - -
Mov Cap-2 Maneuver 854 0 - - - - - - -
Stage 1 878 0 - - - - - - -
Stage 2 978 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 9.6 6.4 0
HCM LOS A
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1511 - 865 - -
HCM Lane V/C Ratio 0.025 - 0.104 - -
HCM Control Delay (s)7.4 0 9.6 - -
HCM Lane LOS A A A - -
HCM 95th %tile Q(veh)0.1 - 0.3 - -
HCM 6th TWSC 2022 Total PM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 7.5
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 80 5 10 35 10 0 0 15 5
Future Vol, veh/h 0 0 0 80 5 10 35 10 0 0 15 5
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 83 83 83 83 83 83 83 83 83 83 83 83
Heavy Vehicles, % 2 2 2 9 9 49 24 44 24 2 8 17
Mvmt Flow 0 0 0 96 6 12 42 12 0 0 18 6
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 117 120 12 24 0 - - - 0
Stage 1 96 96 - - - - - - -
Stage 2 21 24 - - - - - - -
Critical Hdwy 6.49 6.59 6.69 4.34 - - - - -
Critical Hdwy Stg 1 5.49 5.59 - - - - - - -
Critical Hdwy Stg 2 5.49 5.59 - - - - - - -
Follow-up Hdwy 3.581 4.081 3.741 2.416 - - - - -
Pot Cap-1 Maneuver 862 757 947 1459 - 0 0 - -
Stage 1 911 802 - - - 0 0 - -
Stage 2 984 861 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 837 0 947 1459 - - - - -
Mov Cap-2 Maneuver 837 0 - - - - - - -
Stage 1 885 0 - - - - - - -
Stage 2 984 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 9.9 5.9 0
HCM LOS A
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1459 - 848 - -
HCM Lane V/C Ratio 0.029 - 0.135 - -
HCM Control Delay (s)7.5 0 9.9 - -
HCM Lane LOS A A A - -
HCM 95th %tile Q(veh)0.1 - 0.5 - -
HCM 6th TWSC 2037 Background AM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.4
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 80 10 5 40 5 0 0 0 10
Future Vol, veh/h 0 0 0 80 10 5 40 5 0 0 0 10
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, % 2 2 2 19 19 19 19 19 19 25 25 25
Mvmt Flow 0 0 0 103 13 6 51 6 0 0 0 13
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 115 121 6 13 0 - - - 0
Stage 1 108 108 - - - - - - -
Stage 2 7 13 - - - - - - -
Critical Hdwy 6.59 6.69 6.39 4.29 - - - - -
Critical Hdwy Stg 1 5.59 5.69 - - - - - - -
Critical Hdwy Stg 2 5.59 5.69 - - - - - - -
Follow-up Hdwy 3.671 4.171 3.471 2.371 - - - - -
Pot Cap-1 Maneuver 842 739 1029 1501 - 0 0 - -
Stage 1 876 774 - - - 0 0 - -
Stage 2 974 852 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 813 0 1029 1501 - - - - -
Mov Cap-2 Maneuver 813 0 - - - - - - -
Stage 1 846 0 - - - - - - -
Stage 2 974 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 10.1 6.7 0
HCM LOS B
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1501 - 823 - -
HCM Lane V/C Ratio 0.034 - 0.148 - -
HCM Control Delay (s)7.5 0 10.1 - -
HCM Lane LOS A A B - -
HCM 95th %tile Q(veh)0.1 - 0.5 - -
HCM 6th TWSC 2037 Background PM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.8
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 110 5 5 45 5 0 0 10 0
Future Vol, veh/h 0 0 0 110 5 5 45 5 0 0 10 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 83 83 83 83 83 83 83 83 83 83 83 83
Heavy Vehicles, % 2 2 2 9 9 9 24 24 24 2 2 2
Mvmt Flow 0 0 0 133 6 6 54 6 0 0 12 0
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 126 126 6 12 0 - - - 0
Stage 1 114 114 - - - - - - -
Stage 2 12 12 - - - - - - -
Critical Hdwy 6.49 6.59 6.29 4.34 - - - - -
Critical Hdwy Stg 1 5.49 5.59 - - - - - - -
Critical Hdwy Stg 2 5.49 5.59 - - - - - - -
Follow-up Hdwy 3.581 4.081 3.381 2.416 - - - - -
Pot Cap-1 Maneuver 852 752 1057 1475 - 0 0 - -
Stage 1 894 788 - - - 0 0 - -
Stage 2 993 872 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 820 0 1057 1475 - - - - -
Mov Cap-2 Maneuver 820 0 - - - - - - -
Stage 1 861 0 - - - - - - -
Stage 2 993 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 10.3 6.8 0
HCM LOS B
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1475 - 828 - -
HCM Lane V/C Ratio 0.037 - 0.175 - -
HCM Control Delay (s)7.5 0 10.3 - -
HCM Lane LOS A A B - -
HCM 95th %tile Q(veh)0.1 - 0.6 - -
HCM 6th TWSC 2037 Total AM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 7.8
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 80 10 15 40 10 0 0 5 15
Future Vol, veh/h 0 0 0 80 10 15 40 10 0 0 5 15
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, % 2 2 2 19 19 19 19 19 19 25 85 35
Mvmt Flow 0 0 0 103 13 19 51 13 0 0 6 19
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 131 140 13 25 0 - - - 0
Stage 1 115 115 - - - - - - -
Stage 2 16 25 - - - - - - -
Critical Hdwy 6.59 6.69 6.39 4.29 - - - - -
Critical Hdwy Stg 1 5.59 5.69 - - - - - - -
Critical Hdwy Stg 2 5.59 5.69 - - - - - - -
Follow-up Hdwy 3.671 4.171 3.471 2.371 - - - - -
Pot Cap-1 Maneuver 824 721 1020 1486 - 0 0 - -
Stage 1 869 769 - - - 0 0 - -
Stage 2 964 842 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 795 0 1020 1486 - - - - -
Mov Cap-2 Maneuver 795 0 - - - - - - -
Stage 1 839 0 - - - - - - -
Stage 2 964 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 10.2 6 0
HCM LOS B
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1486 - 824 - -
HCM Lane V/C Ratio 0.035 - 0.163 - -
HCM Control Delay (s)7.5 0 10.2 - -
HCM Lane LOS A A B - -
HCM 95th %tile Q(veh)0.1 - 0.6 - -
HCM 6th TWSC 2037 Total PM.syn
2: CR-315 & I-70 WB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 8.1
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 0 0 0 110 5 10 45 10 0 0 20 5
Future Vol, veh/h 0 0 0 110 5 10 45 10 0 0 20 5
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Free Free Free Stop Stop Stop Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 2 - - 0 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 83 83 83 83 83 83 83 83 83 83 83 83
Heavy Vehicles, % 2 2 2 9 9 49 24 44 24 2 8 17
Mvmt Flow 0 0 0 133 6 12 54 12 0 0 24 6
Major/Minor Minor1 Major1 Major2
Conflicting Flow All 147 150 12 30 0 - - - 0
Stage 1 120 120 - - - - - - -
Stage 2 27 30 - - - - - - -
Critical Hdwy 6.49 6.59 6.69 4.34 - - - - -
Critical Hdwy Stg 1 5.49 5.59 - - - - - - -
Critical Hdwy Stg 2 5.49 5.59 - - - - - - -
Follow-up Hdwy 3.581 4.081 3.741 2.416 - - - - -
Pot Cap-1 Maneuver 829 729 947 1452 - 0 0 - -
Stage 1 888 783 - - - 0 0 - -
Stage 2 978 856 - - - 0 0 - -
Platoon blocked, %-- -
Mov Cap-1 Maneuver 798 0 947 1452 - - - - -
Mov Cap-2 Maneuver 798 0 - - - - - - -
Stage 1 855 0 - - - - - - -
Stage 2 978 0 - - - - - - -
Approach WB NB SB
HCM Control Delay, s 10.5 6.2 0
HCM LOS B
Minor Lane/Major Mvmt NBL NBTWBLn1 SBT SBR
Capacity (veh/h)1452 - 809 - -
HCM Lane V/C Ratio 0.037 - 0.186 - -
HCM Control Delay (s)7.6 0 10.5 - -
HCM Lane LOS A A B - -
HCM 95th %tile Q(veh)0.1 - 0.7 - -
HCM 6th TWSC 2021 Existing AM.syn
3: CR-315 & I-70 EB Ramps 03/22/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 1.8
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 6 2 23 0 0 0 0 23 47 1 54 0
Future Vol, veh/h 6 2 23 0 0 0 0 23 47 1 54 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, %13 13 13 2 2 2 19 19 19 16 16 16
Mvmt Flow 8 3 29 0 0 0 0 29 60 1 69 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 130 160 69 - 0 0 89 0 0
Stage 1 71 71 -- - - - - -
Stage 2 59 89 -- - - - - -
Critical Hdwy 6.53 6.63 6.33 - - - 4.26 - -
Critical Hdwy Stg 1 5.53 5.63 -- - - - - -
Critical Hdwy Stg 2 5.53 5.63 -- - - - - -
Follow-up Hdwy 3.617 4.117 3.417 - - - 2.344 - -
Pot Cap-1 Maneuver 839 713 964 0 - - 1423 - 0
Stage 1 925 815 -0 - - - - 0
Stage 2 936 800 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 838 0 964 - - - 1423 - -
Mov Cap-2 Maneuver 838 0 -- - - - - -
Stage 1 925 0 -- - - - - -
Stage 2 935 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9 0 0.1
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 935 1423 -
HCM Lane V/C Ratio -- 0.043 0.001 -
HCM Control Delay (s) - -9 7.5 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.1 0 -
HCM 6th TWSC 2021 Existing PM.syn
3: CR-315 & I-70 EB Ramps 03/22/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 1.4
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 3 0 30 0 0 0 0 35 71 1 73 0
Future Vol, veh/h 3 0 30 0 0 0 0 35 71 1 73 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 93 93 93 93 93 93 93 93 93 93 93 93
Heavy Vehicles, % 3 3 3 2 2 2 6 6 6 8 8 8
Mvmt Flow 3 0 32 0 0 0 0 38 76 1 78 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 156 194 78 - 0 0 114 0 0
Stage 1 80 80 -- - - - - -
Stage 2 76 114 -- - - - - -
Critical Hdwy 6.43 6.53 6.23 - - - 4.18 - -
Critical Hdwy Stg 1 5.43 5.53 -- - - - - -
Critical Hdwy Stg 2 5.43 5.53 -- - - - - -
Follow-up Hdwy 3.527 4.027 3.327 - - - 2.272 - -
Pot Cap-1 Maneuver 833 699 980 0 - - 1439 - 0
Stage 1 941 826 -0 - - - - 0
Stage 2 944 799 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 832 0 980 - - - 1439 - -
Mov Cap-2 Maneuver 832 0 -- - - - - -
Stage 1 941 0 -- - - - - -
Stage 2 943 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 8.9 0 0.1
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 964 1439 -
HCM Lane V/C Ratio -- 0.037 0.001 -
HCM Control Delay (s) -- 8.9 7.5 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.1 0 -
HCM 6th TWSC 2022 Background AM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 2.3
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 10 5 25 0 0 0 0 25 50 5 60 0
Future Vol, veh/h 10 5 25 0 0 0 0 25 50 5 60 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, %13 13 13 2 2 2 19 19 19 16 16 16
Mvmt Flow 13 6 32 0 0 0 0 32 64 6 77 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 153 185 77 - 0 0 96 0 0
Stage 1 89 89 -- - - - - -
Stage 2 64 96 -- - - - - -
Critical Hdwy 6.53 6.63 6.33 - - - 4.26 - -
Critical Hdwy Stg 1 5.53 5.63 -- - - - - -
Critical Hdwy Stg 2 5.53 5.63 -- - - - - -
Follow-up Hdwy 3.617 4.117 3.417 - - - 2.344 - -
Pot Cap-1 Maneuver 814 690 954 0 - - 1414 - 0
Stage 1 908 800 -0 - - - - 0
Stage 2 931 795 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 811 0 954 - - - 1414 - -
Mov Cap-2 Maneuver 811 0 -- - - - - -
Stage 1 908 0 -- - - - - -
Stage 2 927 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.2 0 0.6
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 908 1414 -
HCM Lane V/C Ratio -- 0.056 0.005 -
HCM Control Delay (s) -- 9.2 7.6 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.2 0 -
HCM 6th TWSC 2022 Background PM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 1.7
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 5 0 35 0 0 0 0 40 75 5 75 0
Future Vol, veh/h 5 0 35 0 0 0 0 40 75 5 75 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 93 93 93 93 93 93 93 93 93 93 93 93
Heavy Vehicles, % 3 3 3 2 2 2 6 6 6 8 8 8
Mvmt Flow 5 0 38 0 0 0 0 43 81 5 81 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 175 215 81 - 0 0 124 0 0
Stage 1 91 91 -- - - - - -
Stage 2 84 124 -- - - - - -
Critical Hdwy 6.43 6.53 6.23 - - - 4.18 - -
Critical Hdwy Stg 1 5.43 5.53 -- - - - - -
Critical Hdwy Stg 2 5.43 5.53 -- - - - - -
Follow-up Hdwy 3.527 4.027 3.327 - - - 2.272 - -
Pot Cap-1 Maneuver 813 681 976 0 - - 1426 - 0
Stage 1 930 818 -0 - - - - 0
Stage 2 937 791 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 810 0 976 - - - 1426 - -
Mov Cap-2 Maneuver 810 0 -- - - - - -
Stage 1 930 0 -- - - - - -
Stage 2 933 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9 0 0.5
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 952 1426 -
HCM Lane V/C Ratio -- 0.045 0.004 -
HCM Control Delay (s) - -9 7.5 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.1 0 -
HCM 6th TWSC 2022 Total AM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 2.3
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 10 5 25 0 0 0 0 25 50 5 60 0
Future Vol, veh/h 10 5 25 0 0 0 0 25 50 5 60 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, %14 13 13 2 2 2 19 19 19 50 16 16
Mvmt Flow 13 6 32 0 0 0 0 32 64 6 77 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 153 185 77 - 0 0 96 0 0
Stage 1 89 89 -- - - - - -
Stage 2 64 96 -- - - - - -
Critical Hdwy 6.54 6.63 6.33 - -- 4.6 - -
Critical Hdwy Stg 1 5.54 5.63 -- - - - - -
Critical Hdwy Stg 2 5.54 5.63 -- - - - - -
Follow-up Hdwy 3.626 4.117 3.417 - - - 2.65 - -
Pot Cap-1 Maneuver 811 690 954 0 - - 1245 - 0
Stage 1 905 800 -0 - - - - 0
Stage 2 929 795 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 807 0 954 - - - 1245 - -
Mov Cap-2 Maneuver 807 0 -- - - - - -
Stage 1 905 0 -- - - - - -
Stage 2 924 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.2 0 0.6
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 907 1245 -
HCM Lane V/C Ratio -- 0.057 0.005 -
HCM Control Delay (s) -- 9.2 7.9 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.2 0 -
HCM 6th TWSC 2022 Total PM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 2.1
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 10 0 35 0 0 0 0 40 75 15 75 0
Future Vol, veh/h 10 0 35 0 0 0 0 40 75 15 75 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 93 93 93 93 93 93 93 93 93 93 93 93
Heavy Vehicles, %22 3 3 2 2 2 6 6 6 12 8 8
Mvmt Flow 11 0 38 0 0 0 0 43 81 16 81 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 197 237 81 - 0 0 124 0 0
Stage 1 113 113 -- - - - - -
Stage 2 84 124 -- - - - - -
Critical Hdwy 6.62 6.53 6.23 - - - 4.22 - -
Critical Hdwy Stg 1 5.62 5.53 -- - - - - -
Critical Hdwy Stg 2 5.62 5.53 -- - - - - -
Follow-up Hdwy 3.698 4.027 3.327 - - - 2.308 - -
Pot Cap-1 Maneuver 749 662 976 0 - - 1403 - 0
Stage 1 864 800 -0 - - - - 0
Stage 2 891 791 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 740 0 976 - - - 1403 - -
Mov Cap-2 Maneuver 740 0 -- - - - - -
Stage 1 864 0 -- - - - - -
Stage 2 880 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.2 0 1.3
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 911 1403 -
HCM Lane V/C Ratio -- 0.053 0.011 -
HCM Control Delay (s) -- 9.2 7.6 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.2 0 -
HCM 6th TWSC 2037 Background AM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 2.2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 10 5 35 0 0 0 0 35 65 5 75 0
Future Vol, veh/h 10 5 35 0 0 0 0 35 65 5 75 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, %13 13 13 2 2 2 19 19 19 16 16 16
Mvmt Flow 13 6 45 0 0 0 0 45 83 6 96 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 195 236 96 - 0 0 128 0 0
Stage 1 108 108 -- - - - - -
Stage 2 87 128 -- - - - - -
Critical Hdwy 6.53 6.63 6.33 - - - 4.26 - -
Critical Hdwy Stg 1 5.53 5.63 -- - - - - -
Critical Hdwy Stg 2 5.53 5.63 -- - - - - -
Follow-up Hdwy 3.617 4.117 3.417 - - - 2.344 - -
Pot Cap-1 Maneuver 769 646 931 0 - - 1376 - 0
Stage 1 890 785 -0 - - - - 0
Stage 2 909 769 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 765 0 931 - - - 1376 - -
Mov Cap-2 Maneuver 765 0 -- - - - - -
Stage 1 890 0 -- - - - - -
Stage 2 904 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.4 0 0.5
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 888 1376 -
HCM Lane V/C Ratio -- 0.072 0.005 -
HCM Control Delay (s) -- 9.4 7.6 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.2 0 -
HCM 6th TWSC 2037 Background PM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 1.6
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 5 0 45 0 0 0 0 50 100 5 105 0
Future Vol, veh/h 5 0 45 0 0 0 0 50 100 5 105 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 93 93 93 93 93 93 93 93 93 93 93 93
Heavy Vehicles, % 3 3 3 2 2 2 6 6 6 8 8 8
Mvmt Flow 5 0 48 0 0 0 0 54 108 5 113 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 231 285 113 - 0 0 162 0 0
Stage 1 123 123 -- - - - - -
Stage 2 108 162 -- - - - - -
Critical Hdwy 6.43 6.53 6.23 - - - 4.18 - -
Critical Hdwy Stg 1 5.43 5.53 -- - - - - -
Critical Hdwy Stg 2 5.43 5.53 -- - - - - -
Follow-up Hdwy 3.527 4.027 3.327 - - - 2.272 - -
Pot Cap-1 Maneuver 755 623 937 0 - - 1381 - 0
Stage 1 900 792 -0 - - - - 0
Stage 2 914 762 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 752 0 937 - - - 1381 - -
Mov Cap-2 Maneuver 752 0 -- - - - - -
Stage 1 900 0 -- - - - - -
Stage 2 910 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.2 0 0.3
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 915 1381 -
HCM Lane V/C Ratio -- 0.059 0.004 -
HCM Control Delay (s) -- 9.2 7.6 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.2 0 -
HCM 6th TWSC 2037 Total AM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 2.5
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 15 5 35 0 0 0 0 35 65 10 75 0
Future Vol, veh/h 15 5 35 0 0 0 0 35 65 10 75 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 78 78 78 78 78 78 78 78 78 78 78 78
Heavy Vehicles, %14 13 13 2 2 2 19 19 19 50 16 16
Mvmt Flow 19 6 45 0 0 0 0 45 83 13 96 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 209 250 96 - 0 0 128 0 0
Stage 1 122 122 -- - - - - -
Stage 2 87 128 -- - - - - -
Critical Hdwy 6.54 6.63 6.33 - -- 4.6 - -
Critical Hdwy Stg 1 5.54 5.63 -- - - - - -
Critical Hdwy Stg 2 5.54 5.63 -- - - - - -
Follow-up Hdwy 3.626 4.117 3.417 - - - 2.65 - -
Pot Cap-1 Maneuver 753 634 931 0 - - 1209 - 0
Stage 1 874 774 -0 - - - - 0
Stage 2 907 769 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 745 0 931 - - - 1209 - -
Mov Cap-2 Maneuver 745 0 -- - - - - -
Stage 1 874 0 -- - - - - -
Stage 2 897 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.5 0 0.9
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 866 1209 -
HCM Lane V/C Ratio -- 0.081 0.011 -
HCM Control Delay (s) -- 9.5 8 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.3 0 -
HCM 6th TWSC 2037 Total PM.syn
3: CR-315 & I-70 EB Ramps 03/30/2021
Synchro 10 Report
Page 1
Intersection
Int Delay, s/veh 2
Movement EBL EBT EBR WBL WBT WBR NBL NBT NBR SBL SBT SBR
Lane Configurations
Traffic Vol, veh/h 10 0 45 0 0 0 0 50 100 15 105 0
Future Vol, veh/h 10 0 45 0 0 0 0 50 100 15 105 0
Conflicting Peds, #/hr 0 0 0 0 0 0 0 0 0 0 0 0
Sign Control Stop Stop Stop Free Free Free Free Free Free Free Free Free
RT Channelized - - None - - None - - None - - None
Storage Length - - - - - - - - - - - -
Veh in Median Storage, # - 0 - - 16979 - - 0 - - 0 -
Grade, %- 0 - - 0 - - 0 - - 0 -
Peak Hour Factor 93 93 93 93 93 93 93 93 93 93 93 93
Heavy Vehicles, %22 3 3 2 2 2 6 6 6 12 8 8
Mvmt Flow 11 0 48 0 0 0 0 54 108 16 113 0
Major/Minor Minor2 Major1 Major2
Conflicting Flow All 253 307 113 - 0 0 162 0 0
Stage 1 145 145 -- - - - - -
Stage 2 108 162 -- - - - - -
Critical Hdwy 6.62 6.53 6.23 - - - 4.22 - -
Critical Hdwy Stg 1 5.62 5.53 -- - - - - -
Critical Hdwy Stg 2 5.62 5.53 -- - - - - -
Follow-up Hdwy 3.698 4.027 3.327 - - - 2.308 - -
Pot Cap-1 Maneuver 694 605 937 0 - - 1358 - 0
Stage 1 836 775 -0 - - - - 0
Stage 2 869 762 -0 - - - - 0
Platoon blocked, %- - -
Mov Cap-1 Maneuver 685 0 937 - - - 1358 - -
Mov Cap-2 Maneuver 685 0 -- - - - - -
Stage 1 836 0 -- - - - - -
Stage 2 858 0 -- - - - - -
Approach EB NB SB
HCM Control Delay, s 9.4 0 1
HCM LOS A
Minor Lane/Major Mvmt NBT NBREBLn1 SBL SBT
Capacity (veh/h)- - 878 1358 -
HCM Lane V/C Ratio -- 0.067 0.012 -
HCM Control Delay (s) -- 9.4 7.7 0
HCM Lane LOS - - A A A
HCM 95th %tile Q(veh) -- 0.2 0 -
North Hangs Mine
February 2022 40
Water Supply/Distribution Plan
The proposed North Hangs Mine will not be served by a Water Service Entity. All potable water
onsite will be provided in the form of bottled water or similar service provided by Western Slope
Materials to its employees. Therefore, a waiver according to Section 4-118 and 4-202.M of the
Garfield County LDC are requested.
It is anticipated that five employees will work at the North Hangs Mine. The US Mine Safety and
Health Administration (MSHA) does not specify an amount of water for employees at a mine.
Given the hours of operation of 7 am to 7 pm, Monday thru Saturday, 3 gallons of water per
employee per day, Western Slope Materials will need to provide 18 gallons of water per week
per employee or 90 gallons total per week. Western Slope Materials regularly provides such
water supply to its current employees at Grand River Sand and Gravel to the southeast via a
potable water contract. This practice would continue at the North Hangs Mine.
II Lewicki & Associates
North Hangs Mine
February 2022 41
Wastewater Man./Treatment Plan
The North Hangs Mine will not be served by an existing public collection system and treatment
facilities; portable toilets will be maintained onsite. Therefore, a waiver according to Sections 4-
118 and 4-202.N of the Garfield County LDC are requested.
Wastewater services are not available from the City of Rifle or the Town of Silt. Mining of the
site means an on-site wastewater treatment system (OWTS) is impractical. Portable toilets,
serviced by a contractor, will provide sufficient wastewater systems for employees. Additionally,
these toilets will be removed following mining and reclamation at the end of operation life,
meaning no demolition or close-out of them will be needed.
II Lewicki & Associates
North Hangs Mine
February 2022 42
Floodplain Analysis
See the attached floodplain analysis.
II Lewicki & Associates
North Hangs
June 2021 1
MEMO: North Hangs Mine – Garfield County Conditional Use Permit Application
Floodplain Impact Evaluation
DATE: June 15, 2021
TO: Garfield County Flood Control Officer
The North Hangs Mine, as proposed by Western Slope Materials, near Silt, CO, will disturb 72.8
acres of ground through sand and gravel mining. Mining of sand and gravel material at the site will
entail the excavation of substantial depth of alluvium within the floodplain of the Colorado River in
this area. In accordance with Garfield County Land Use Code (Section 3-301), Western Slope
Materials (WSM) has prepared this floodplain analysis for the North Hangs Mine. It will analyze the
baseline (existing) conditions of the floodplain in this area and demonstrate how the proposed
mining operation will not lead to any increase in the water surface elevation of the 100-YR flood
event in the area of proposed operation.
1. Modelling Basis and Methodology
A flood routing model was built using the US Army Corps of Engineers HEC-RAS software. A
steady state flow model using the Colorado Water Conservancy Board’s (CWCB) determined flow
of 34,900 CFS for the 100-YR event was built. An upstream and downstream Normal Depth of 0.2-
0.3% was used as boundary conditions. These slopes are measured from the LIDAR survey data
available from Garfield County.
Garfield County LIDAR survey data was used as the basis for cross sections in the HEC-RAS
model in both the baseline and developed conditions. The I-70 bridge was modelled as a single
entity in each model based on the LIDAR captured elevations at its abutments.
Using Civil 3D models of the proposed maximum mining scenario (end of Phase 2), the LIDAR
topography was modified for use in a developed scenario model. The results of the two models are
compared to see if the change in topography adjacent to the Colorado River leads to offsite flood
impacts. The only difference between Baseline and Development Conditions is the presence of the
Phase 2 mining topography.
Baseline Conditions
The baseline conditions of the area represent the current, pre-mining state of the Colorado River
corridor in the area of the proposed operation. This includes portions of the Town of Silt, the I-70
bridge over the Colorado River, the Silt Pit south of the river, and the existing agriculture properties
along the river downstream. The baseline topography can be seen as a color gradient with the
cross-section locations in Figure 1. The project area is marked in red.
II Lewicki & Associates
EN GINEERIN G I GE O LOGY I E NVIR O NMENTA L
1.1.
D Lewicki & Associates
North Hangs
June 2021 2
Figure 1. Baseline Conditions HEC-RAS Map
Developed Conditions
The developed conditions of the area represent the maximum mining state of the operation along
the Colorado River corridor. Cross sections used in the baseline condition model are re-used in the
developed conditions model, with the only change being the presence of the mining excavation and
onsite berms. No permanent facilities or sturctures are proposed as part of the mining and
processing operations, and therefore no building pads are included. Figure 2 shows the Developed
Conditions topography and cross sections.
To be conservative in the HEC-RAS model, the mining excavation is modelled as an obstruction at
its top. When pit dewatering is not taking place, the active mining cell will fill with groundwater to an
elevation roughly four feet below the existing grade. If this condition was modelled completely in
HEC-RAS, the four feet of depth to groundwater would provide some storage for floodwaters and
potentially lowering the downstream flooding extents. Therefore, the mining excavation is modelled
as an obstruction to ensure this storage component is not part of the model.
--Ri ver Cross Sections
1.2.
D Lewicki & Associates
North Hangs
June 2021 3
Figure 2. Developed Conditions HEC-RAS Map
2. HEC-RAS Results
Results of the HEC-RAS models are summarized in the table below. As shown, the water surface
elevation (WSE, ft.) does not increase from the baseline to developed condition. This is expected as
the mining activity does not create a fill in the floodplain that would cause floodwaters to rise.
--River Cross Sections
D Lewicki & Associates
North Hangs
June 2021 4
Table 1. HEC-RAS Data Results
River Station Plan Q Total
(CFS)
Min Ch El
(ft)
Crit W.S.
(ft)
E.G. Elev
(ft)
E.G.
Slope
(ft/ft)
Vel Chnl
(ft/s)
Flow
Area
(sq. ft.)
Top
Width
(ft)
Froude #
Chl
W.S.E. (ft) W.S.E. Ch
(ft)
190208 Baseline 34,900 5402.4 5407.8 5409.9 0.0 12.1 3368.1 2143.3 0.9 5407.8 -0.1 190208 P2 Mining 34,900 5402.4 5407.7 5409.9 0.0 12.5 3237.4 2116.3 1.0 5407.7
189185 Baseline 34,900 5399.5 5406.0 5409.1 1.0 14.1 2484.2 474.7 1.0 5406.0 0.0 189185 P2 Mining 34,900 5399.5 5406.0 5409.1 0.0 14.1 2484.2 474.7 1.0 5406.0
189067 I-70 Bridge Bridge
189060 Baseline 34,900 5399.3 5405.7 5408.7 1.0 13.9 2505.7 419.8 1.0 5405.7 -0.4 189060 P2 Mining 34,900 5399.4 5405.7 5408.7 0.0 14.9 2342.8 421.8 1.1 5405.3
188860 Baseline 34,900 5398.6 5405.2 5408.0 0.0 13.6 2619.9 1990.2 1.0 5405.2 0 188860 P2 Mining 34,900 5398.6 5405.1 5408.0 0.0 13.6 2620.5 1990.2 1.0 5405.1
188427 Baseline 34,900 5398.3 5401.9 5403.6 0.0 14.4 3799.0 7823.9 1.4 5401.9 -0.4 188427 P2 Mining 34,900 5398.3 5401.4 5403.2 0.0 14.4 3550.8 7818.8 1.6 5401.4
187293 Baseline 34,900 5393.6 5394.9 5396.5 0.1 14.5 3731.9 5660.3 2.2 5394.9 0 187293 P2 Mining 34,900 5393.6 5394.9 5396.5 0.1 14.7 3678.6 5608.8 2.3 5394.9
185842 Baseline 34,900 5390.3 5393.0 5394.4 0.0 12.2 4137.2 5353.5 1.4 5393.0 -0.1 185842 P2 Mining 34,900 5390.2 5392.9 5394.3 0.0 12.2 4167.2 5359.2 1.4 5392.9
184556 Baseline 34,900 5387.3 5390.4 5391.4 0.0 11.3 5721.6 5893.0 1.2 5390.4 0 184556 P2 Mining 34,900 5387.3 5390.4 5391.4 0.0 11.4 5714.9 5881.5 1.2 5390.4
183265 Baseline 34,900 5382.0 5386.9 5388.1 0.0 10.6 5773.0 5666.3 1.1 5386.9 -0.1 183265 P2 Mining 34,900 5382.0 5386.8 5388.1 0.0 10.8 5603.6 5706.3 1.2 5386.8
D Lewicki & Associates
North Hangs
June 2021 5
Cross Sections
Cross sections are the basis of steady state flood modelling in HEC-RAS. The baseline and
developed condition at each cross section are shown Appendix 1. The cross sections at the mine
location are shown in Figure 3 and Figure 4. Each cross section shows the channel geometry at the
cross section along with the water surface level (WS) for each scenario. The mining excavations
are modelled as obstructions (solid black).
Figure 3. Baseline vs. Developed Conditions at Cross Section 188427
North Hangs Phase 2
Mining Excavation
Colorado River
channel
2.1.
North Hangs Plan: 1) Base line 6/16/202 1 2) P2 Mining 6/16/202 1
~--------.07----------->< . r--01 ------,
~00 0
+
~00
2000 4000 6000
(ft)
3
5
8000
Legend
EG PF 1 -Baseline
EG PF 1 -P2 Mi ning
C rit PF 1 -Baseline
WS PF 1 -Base line
WS PF 1 -P2 Mining
Crit P F 1 -P2 Mining
10000
Gro und
Inell • Bank Sta
D Lewicki & Associates
North Hangs
June 2021 6
Figure 4. Baseline vs. Developed Conditions at Cross Section 187293
3. Floodplain Revisions
The Federal Emergency Management Association and the Colorado Department of Natural
Resources (CNDR) are currently working with Garfield County to revise the floodplain in this area.
Prior to developing the HEC-RAS model for the North Hangs Mine, Lewicki & Associates consulted
with CDNR staff and reviewed the draft floodplain. The cross sections used in the North Hangs
Mine HEC-RAS model are based on the draft floodplain model. Furthermore, the draft floodplain
model was compared to both baseline and developed conditions as a general control of the model.
No inconsistencies were found.
Floodway
No floodway is mapped in the area of North Hangs Mine. CDNR 1 staff informed Lewicki &
Associates that no modelling of the floodway through this area is planned. Given that the developed
1Discussions with Marta Blanco Castano, CDNR 05/12/21
North Hangs Phase 2
Mining Excavation
Colorado River
channel
g
North Hangs Plan : 1) Base line 6/16/2021 2) P2 Mining 6/16/202 1
S urv eyed XS 4546000XS
------------------.1 ------------------_035 +-07 __J
5460 1
5440
5420
5400
5380
5360+--~------~-~-~------~-~-~------~-~------~--~
Legend
EG PF 1 -Baseline
EG PF 1 -P2 Mining
Crit PF 1 -Baseli ne
WS PF 1 -Ba selin e
WS PF 1 -P2 Min ing
Crit P F 1 -P2 Mining
Grou nd
Inell • Bank Sta
0 2000 4000
(ft)
6000 8000
3.1.
D Lewicki & Associates
North Hangs
June 2021 7
condition shows no increase in the WSE from the baseline conditions, the North Hangs Mine will
not alter flood patterns in this area, and thus will not affect whatever floodway may exist.
4. Conclusion
The analysis in this report has been conducted to satisfy the requirements of Garfield County Land
Use and Development Code Sections 4-109 7-1002.A.
Modelling of the North Hangs Mine’s potential impact on the flood waters of the Colorado River in
this area shows no increase in WSE. Therefore, the North Hangs Mine will have no impact on
flooding in the valley.
Ben Langenfeld, P.E.
benl@lewicki.biz
(720) 842-5321
D Lewicki & Associates
North Hangs
June 2021
Appendix 1 – HEC-RAS Cross Sections
D Lewicki & Associates
0 500 1000 1500 2000 2500 3000 3500
5395
5400
5405
5410
5415
5420
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
Merged US Survey 47000XS
(ft) (ft)Legend
EG PF 1 - P2 Mining
EG PF 1 - Baseline
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.04 .07 .035 .07 .1
•
0 500 1000 1500 2000
5398
5400
5402
5404
5406
5408
5410
5412
5414
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - P2 Mining
WS PF 1 - Baseline
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.07 .035 .07 _J .L
I
_I
I I r-
• • -•
...
.' .. J ·--.. r·· -----------
• ,,)
J I
I
◄, ~ ~
1, \1 ✓--1_ ,,~·1 .....
l ~-----'
' '
' 1,
,, '
' I
• '~
I-----
0 500 1000 1500 2000
5395
5400
5405
5410
5415
5420
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - P2 Mining
WS PF 1 - Baseline
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.07 .035 .07
.
•
0 500 1000 1500 2000
5398
5400
5402
5404
5406
5408
5410
5412
5414
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - P2 Mining
EG PF 1 - Baseline
Crit PF 1 - Baseline
WS PF 1 - Baseline
Crit PF 1 - P2 Mining
WS PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.1 .07 .035 .07 .1I J I I J
I I I I ·1 .. • J
-____ _.,. ~
~ =
..r --~-----
• / t ,. ,.
' ,, , .. _ 1• -
,. ,.
0
,.
I
,.
I
0 500 1000 1500 2000
5396
5398
5400
5402
5404
5406
5408
5410
5412
5414
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.07 .035 .1
.
•
0 2000 4000 6000 8000 10000
5380
5400
5420
5440
5460
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.07 .
0
3
5
.07
.
•
0 2000 4000 6000 8000
5360
5380
5400
5420
5440
5460
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
Surveyed XS 4546000XS
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.1 .035 .07
.
•
0 1000 2000 3000 4000 5000 6000 7000 8000
5380
5390
5400
5410
5420
5430
5440
5450
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.07 .035 .07
.
=
•
0 1000 2000 3000 4000 5000 6000 7000 8000
5360
5380
5400
5420
5440
5460
5480
5500
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.07 .035 .07J L -I I ·~
~
.
=
•
•
_,
,-~ r
-----
1 ~~~~~~~ -ifT i• 'I ~
0 1000 2000 3000 4000 5000 6000 7000
5360
5380
5400
5420
5440
5460
5480
North Hangs Plan: 1) Baseline 6/16/2021 2) P2 Mining 6/16/2021
(ft) (ft)Legend
EG PF 1 - Baseline
EG PF 1 - P2 Mining
Crit PF 1 - Baseline
WS PF 1 - Baseline
WS PF 1 - P2 Mining
Crit PF 1 - P2 Mining
Ground
Ineff
Bank Sta
.1 .035 .07
.
•
North Hangs Mine
February 2022 43
Article 7 Standards
Divisions 1, 2, 3, and portions of 10 of Article 7 of the Garfield County LDC are applicable to the
North Hangs Mine. Divisions 1, 2, and 3 are addressed in this section, or this section directs to
the portions of the SUP and/or CDRMS permit application where the standards is addressed.
The applicable portions of Division 10, 7-1001 Industrial Uses and 7-1002 Gravel Extraction are
addressed in their own sections.
1. Division 1. General Approval Standards
7-101 Zone District Standards
The North Hangs Mine is currently zoned Rural. This zone district provides for the use of natural
resources. Gravel operations are allowed via the Major Impact Review land use permit process.
7-102 Comprehensive Plan and Intergovernmental Agreements
The Garfield County Comprehensive Plan Future Land Use Map (FLUM) designates the North
Hangs Mine as part of the Urban Growth Area for the Town of Silt. This means that the Town of
Silt input and insight during the review process will be a key component of the Garfield County
review of this special use permit.
The Town of Silt identifies this property as “Public/Quasi Public Parks & Open Space” in its
Comprehensive Plan. It should be noted that the area to the south of I-70, which hosts an active
gravel pit, is also identified as “Public/Quasi Public Parks & Open Space”. Land to the west,
north, and southwest is all identified as “Natural Resource Extraction/Future Public Quasi-Public
Parks & Open Space”, which is a designation intended to cover areas with active gravel pits as
well as logical locations of future mines on existing deposits.
Given the presence of the Colorado River between the property and the Town of Silt, and the
fact that growth around Silt tends to be concentrated north of the River, the development of the
North Hangs Mine into an active gravel pit and then lakes with wetlands will fit into Town goals.
The mined out North Hangs Mine will provide quality recreation space and wildlife habitat upon
reclamation. The wildlife benefits will come before mining is even finished, as delineated in the
mining plans for the operation. The applicant has reached out and met with the Town of Silt to
create additional transparency during the permitting process.
7-103 Compatibility
The North Hangs Mine is situated amongst industrial, agricultural, and major transport land
uses. The existing Grand River Sand & Gravel operation (also known as the Silt Pit) is located
to the southeast, across from I-70. Interstate 70 is the primary adjacent land use to the south
and east. The Colorado River and associated riparian areas lie along the north and east sides of
the North Hangs property, providing substantial buffer between the operation and local
residences and businesses in Silt. The Shidelrosa farm owns the agricultural land to the west.
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February 2022 44
Agricultural activities are thoroughly compatible with sand and gravel mines. Major
transportation corridors are essentially industrial uses themselves, which are compatible with
adjacent sand and gravel mines. The nearest residential and commercial properties are at least
half a mile away in the Town of Silt.
The North Hangs Mine is compatible with surrounding land uses and activity.
7-104 Source of Water
The North Hangs Mine will consume water in two primary ways: potable water for employees
and water used in operations. Potable water is addressed under the Water Supply/Distribution
Plan earlier in this application. Water for use in operations involves water for dust control,
material washing, and water evaporation from exposed groundwater following reclamation.
Water for dust control and material washing will be covered either by an augmentation plan or
substitute water supply plan through the Colorado Division of Water Resources. Water supply
for either an SWSP or augmentation plan may be one of the following:
• Conversion or purchase of water rights for use as an augmentation and industrial water
supply.
• Purchase of water for augmentation from a reservoir.
• A combination of the above two options
Water supply for operations must be secured and in place in order to secure a gravel well permit
from the Colorado Division of Water Resources. A gravel well permit from CDWR is required to
legally operate a mine such as the North Hangs Mine.
The North Hangs Mine Major Impact Review land use change permit is being pursued in
advance of finalizing the water source for operations. The mine will not be opening for several
years, and thus there is time for Western Slope Materials to procure necessary water supply for
the operation.
Prior to mining operations at the North Hangs Mine, Western Slope Materials will provide
Garfield County with proof of a gravel well permit, including proof of water supply for
operations.
7-105 Central Water Distribution and Wastewater Systems.
See the Water Supply/Distribution Plan and Wastewater Man./Treatment Plan sections earlier in
this application.
7-106 Public Utilities
Utilities required at the North Hangs Mine are minimal. A power transmission line is available to
supply power to portable plants and the scale. No natural gas systems will be required onsite.
Map C-1 shows the location of all known utility easements, and no new easements are
proposed.
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7-107 Access and Roadways
The North Hangs Mine will have legal and physical access to County Road 316, as shown on
Maps C-2 and C-3. Details regarding the access improvements needed can be found in the
Traffic Study section of this application. No roadways are needed for the operation, and the
mine will not be open to the public.
7-108 Use of Land Subject to Natural Hazards
The North Hangs Mine property is not subject to any potential natural hazards like falling rock,
landslides, mud flows, or radiation. Flooding and the presence of a high water table will not
negatively affect the mining operation. The Floodplain Analysis section clearly demonstrates
that mining activity will not exacerbate flood risks in the area. The presence of a high water table
will not interfere with mining or damage and proposed structures. Dewatering activities will move
groundwater out to the Colorado River during mining. Once mining and reclamation area
complete, the high water table will lead to high quality groundwater lakes and associated
wetland habitat.
See the Geologic Hazard section for more information.
7-109 Fire Protection
A water tank for dust control and fire suppression will be maintained onsite at the fuel farm. The
tank will be at least 2500 gallons.
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North Hangs Mine
February 2022 46
2. Division 2. General Resource Protection Standards
7-201 Agricultural Lands
The North Hangs Mine will not limit the viability of existing agricultural operations on adjacent
land or adversely affect them. Fences will be maintained around the property to prevent the
uncontrolled migration of livestock.
The Bernudy Ditch that passes through the site will be maintained either in its current form
(Phase 1) or rerouted into a pipe (Phase 2). Access to the ditch will be maintained throughout
mining and reclamation. Prior to the development of Phase 2, a new ditch easement for the pipe
reroute will be recorded with Garfield County along with approval of the ditch reroute from the
Bernudy Ditch owners.
7-202 Wildlife Habitat Areas
Western Slope Materials consulted with a professional biologist in developing the North Hangs
Mine plans and designs. The analysis of this professional can be found in the Impact Analysis –
Environmental Impacts section of this application.
No critical wildlife habitats will be affected by this operation.
7-203 Protection of Waterbodies
A minimum setback of 100’ is maintained from the Colorado River in the maximum extents of
mining shown on Map C-3. During the majority of the mine’s life, this setback will be 250’+. Prior
to mining within the 250’ setback, Western Slope Materials will provide Garfield County with
inflow/outflow structure designs that are approved by the CDRMS. These structures will be
constructed as part of final mining and reclamation, if Western Slope Materials mines within 250’
of the Colorado River.
7-204 Drainage and Erosion
A CDPHE discharge permit will be secured for all discharge activities at the North Hangs Mine.
Drainage and stormwater runoff is addressed in detail in Exhibit G of the CDRMS application in
Appendix 4 as well as the Stormwater Runoff sub-section of Section 7-1002 Gravel Extraction
further on in this application.
7-205 Environmental Quality
Air permits will be secured from CDPHE prior to operations onsite. All hazardous materials will
be stored in accordance with all applicable State and Federal regulations.
7-206 Wildfire Hazards
The North Hangs Mine will not increase the hazards associated with wildfire in this area.
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February 2022 47
7-207 Natural and Geologic Hazards
The North Hangs Mine is not in an avalanche, landslide, alluvial fan, or rockfall hazard area. No
development will occur on steep slopes, on expansive soils, on corrosive rock, in mudflow
areas, or over faults.
7-208 Reclamation
The detailed reclamation plan for the North Hangs Mine can be found within Exhibit E of the
CDRMS permit application in Appendix 4.
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3. Division 3. Site Planning and Development Standards
7-301 Compatible Design
The North Hangs Mine is designed to be compatible with surrounding land uses. Buffers and
setbacks ensure that mining activity does not negatively impact agricultural activity to the west,
the Colorado River to the north and east, and I-70 to the east and south. As shown in the Noise
Analysis in Appendix 1, all operations will be in complete compliance with State noise statutes.
7-302 Off-Street Parking and Loading Standards
Over 250,000 square feet of open ground will be available within the Processing Area to
accommodate parking and loading for the North Hangs Mine. All parking areas will be gravelled
to minimize dust generation. As the operation access is located at the end of a county road,
vehicle ingress/egress, parking, and loading, will not interfere with any offsite traffic flow
patterns.
7-303 Landscaping Standards
The North Hangs Mine is an industrial use, and is therefore exempt from this section.
7-304 Lighting Standards
Lighting will only be for emergency repairs and maintenance at North Hangs. It will always be
downcast and limited in use.
7-305 Snow Storage Standards
With over 250,000 square feet of open ground within the processing area, the North Hangs
Mine will have more than enough space to store snow and allow for employee (estimated at 5
people) parking. Snowmelt will be handled by stormwater control measures onsite. See the
SWMP.
7-306 Trail and Walkway Standards
No trails or walkways are proposed at North Hangs Mine.
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February 2022 49
Section 7-1001 Industrial Uses
The North Hangs Mine complies with all components of Section 7-1001 of the Garfield County
Land Development Code. This section applies to the recycling & concrete production activities
proposed.
1. Residential Subdivisions
The North Hangs Mine is not located in or adjacent to any platted subdivision.
2. Setbacks
All activity on the North Hangs Mine is at least 100 feet from adjacent residential property lines.
3. Concealing and Screening
Almost all storage, fabrication, service, and repair operations on the North Hangs Mine will be
screened by trees, berms, and distance from neighboring properties. Stockpiles will be
screened as much as possible due to physical limits of the site. Topsoil storage will take place in
berms along the site perimeter, and while those will be visible, they will be vegetated and
landscaped to blend into the environment.
4. Storing
All materials will be stored in a manner that prevents their off-property transfer by forseeable
natural cause or force. This includes watering of material stockpiles, vegetation of long term
topsoil stockpiles, and de-peaking of piles as needed. Mine Safety and Health Administration
(MSHA) regulations will be followed for all storage onsite. No storage will be within 100 feet of a
property line. Petroleum products will be stored in accordance with EPA rules and the SPCC
plan for the site.
5. Industrial Wastes
No industrial wastes will be produced onsite. Any industrial waste that may be produced by the
operation will be disposed of in a manner consistent with Federal and State statutes. Flammable
or explosive solids or gases and other hazardous materials including wastes shall be stored
according to the manufacturer’s standards and shall comply with the national, State, and local
fire codes and written recommendations from the appropriate local fire protection district.
6. Noise
North Hangs Mine operations will operate within state noise limits.
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February 2022 50
7. Ground Vibration
Operations at the North Hangs Mine will not produce ground vibration that is perceptible without
instruments at the property line. Recycling and concrete production will not involve blasting and
any vibrations associated with processing plants are perceived only as sound.
8. Hours of Operation
Hours of operation at the North Hangs Mine will be limited to Monday thru Saturday, 7am to 7
pm.
9. Interference, Nuisance, or Hazard
The North Hangs Mine will be operated in a manner so that it does not emit heat, glare,
radiation, or fumes that substantially interfere with the existing use of adjoining property or that
constitutes a public nuisance or hazard.
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February 2022 51
Section 7-1002 Gravel Extraction
1. Water Quantity and Quality Impacts/ Floodplain Impacts
The North Hangs Mine shall comply with the applicable standards of section 3-301, Floodplain
Overlay Regulations, and will be subject to section 4-109, Development in 100-Year Floodplain.
The following sections will discuss specific items in more detail. Concrete production is
considered part of gravel extraction for the purposes of this SUP.
Flammable or Explosive Solids or Gases
No flammable or explosive solids or gases will be stored on site.
Storage of Materials
Stockpiles of materials will be located within the processing and stockpiling area and will be
contained within stormwater berms to prevent the movement of materials offsite. No materials
will be stored or placed outside of stormwater berms. No permanent overburden or product piles
will be generated during the course of the North Hangs Mine operation. Visual berms will be
created from stripped topsoil and will remain in place during mining and the operation of the
stockpile and processing area. Topsoil will be either used immediately for reclamation or placed
in temporary stockpiles in the stockpile area, until needed for reclamation.
Floodplain/Floodway
The North Hangs Mine affected area is located adjacent to the Colorado River. The disturbance
area of the site will be a minimum of 250 feet from the river in Phase 1 and a minimum of 100
feet from the river in Phase 2. The entire site is within the Federal Emergency Management
Administration (FEMA) Floodplain Zone A (100-YR event). No floodway is mapped in this area,
according to FEMA. The 100-year floodplain is shown on Exhibit C and F maps. A Floodplain
Analysis can be found earlier in this application.
Dewatering pathways and methodologies are detailed on Map C-2 and C-3 of the CDRMS
application.
1.1.
1.2.
1.3.
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February 2022 52
2. Air Quality
The CDPHE regulates both air pollution and fugitive dust that are sourced from businesses in
Colorado. A general air permit will be obtained for fugitive dust, and any required Air Pollutant
Emission Notices (APEN) will be submitted prior to the commencement of mining.
Air Quality Protection
. The following best management practices will be in place for the operation:
• All mining will occur below the existing topography, which will act to limit the migration of
dust and air pollution from the site.
• Disturbance footprint will be limited to the smallest for feasible operations
• Crushing and screening equipment will be equipped with water sprays in order to keep
material wet
• Haul roads, processing and stockpiles floor, and the mining area floor will be watered as
needed
• Haul roads and processing and stockpiles floor will be graveled once they have been
constructed
• Product stockpiles will be maintained moist either from processing or from truck watering
• Product stockpiles will be de-peaked.
• Topsoil stockpiles to be in place longer than 90 days will be seeded with the permanent
seed mix
• Site access will be paved to the main entrance
• Topsoiled reclaimed slopes will be seeded in the first favorable season following the
placement of topsoil
• All internal roads will be gravel
If additional dust suppression is needed at any time, additional watering will take place. This will
be determined by the Facility Manager. In the event of a dust ‘incident’, the Facility Manager will
determine if the incident can be corrected via additional controls or if operation shut down is
needed. The Facility Manager, and his/her designees will be responsible for maintaining a day-
to-day, hour-by-hour sense of the conditions on site and their propensity to generate dust.
Similarly, the Facility Manager would be aware that high afternoon temperatures during the
summer dry out watered areas of the site faster and increase the likelihood of dust generation at
that time of day. Therefore, the Facility Manager would task the water truck to spray active
areas of the site additional times in the hot summer afternoon. It is in this flexible manner that
the dust coming from the North Hangs Mine can and will be minimized. The fact that the
2.1.
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February 2022 53
majority of the excavation will be conducted below the water table will also greatly reduce the
generation of air pollution.
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North Hangs Mine
February 2022 54
3. Noise/Vibration
Prior to the initiation of mining activities, Hankard Environmental Inc (HEI) conducted a noise
impact analysis for the proposed North Hangs Mine. Hankard Environmental Inc. gathered
detailed information regarding the noise sources, including makes and models of mining
equipment, crushers, screens, batch plants, etc., as well as existing and future topography, and
mining and reclamation details. Based on this data, source noise levels were drawn from the
HEI measurement database of similar equipment. Where data was limited, HEI made
assumptions based on their experience and/or gather publicly available GIS data. Noise source
measurements were also conducted by HEI and are included in the attached report. Hankard
Environmental Inc. created a map of the applicable noise limits surrounding the Project per CRS
§25-12 for review and approval by the North Hangs Mine. Hankard Environmental Inc. created
noise models (i.e.: pre-mining, full-mining, reclamation) as necessary to determine the worst-
case model. Mitigation was modeled as needed for the worst-case model. The noise models
include point predictions at noise sensitive receptors and noise level contours. Noise models
were created using SoundPLAN v8.2 software that applied the International Organization for
Standardization 9613-2. See the attached HEI report for further details and results of the noise
impact analysis.
A variety of best management practices will be employed to mitigate noise and vibration
impacts. They include:
• No use of explosives
• Non-beeping back up alarms
• Containing all mining activity behind the topsoil berm and the natural and augmented
screen of trees as much as possible
• Containing all processing activity behind berms as much as possible
• Locating all processing plants as far away from neighbors as possible
• All mining will be conducted below the existing grade
• Mining and plant activities are limited to daylight hours (half an hour before sunrise to
half an hour after sunset)
• Haul trucks will not use J-brakes
In the event that equipment or activity generates nuisance noise in a manner that was
unanticipated, such activity or equipment will be taken offline until it can be operated in a non-
nuisance manner. The Facility Manager can be contacted by anyone in the area or by any
Garfield County personal that detects a nuisance noise. Contractor equipment will be required
to operate under the same constraints as that of the operator.
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February 2022 55
4. Visual Mitigation
Due to the fact that the North Hangs Mine is larger than 30 acres, it will be sequenced in a
logical manner so as the minimize the visual impact of the operation. This will entail beginning
the mining in the south portion of the permit area and progressing northwards. In order to
minimize the visual impacts, reclamation will occur as soon as possible in all mined out areas,
and will begin no later than 6 months after the commencement of a new phase of mining.
Additionally, landscaping along the southside of the operation will be developed in advance of
mining operations.
Visual renders were created of the North Hangs site to demonstrate what the mine will
potentially look like through all phases of mining and reclamation. Photos were captured at six
key observation points to demonstrate what is visible of the mine from the nearest neighbors
and adjacent highway with the visual mitigation measures in place. Four of the observation
points are located along the adjacent I-70 highway to the south as these are the closest views
the public will see of the North Hangs mine. These locations are dispersed along the spread of
the site in the areas where the mine is most visible to show what the public will see as they drive
by. The remaining two observation points are located to the north of the site along Highway 6
where the closest neighbors will be able to see the mine.
The site is most visible to the public from I-70. Screening from berms and trees will hide the
majority of the processing area near the site entrance and the concrete plant in the west portion
of the processing area. An example of the size and type of concrete plant proposed can be seen
in Appendix 7. The trees that will be used for screening during mining will be transplanted from
the existing vegetation on site prior to mining. Transplanting large vegetation maximizes its
effectiveness as a screening tool. Some smaller vegetation will be planted from seed as well,
and provide infill screening over time. In the areas without berms and trees in place, the pit will
be visible from the road. However, the topography will provide natural cover from the activities
occurring on the mining floor.
The key observation point (KOP) locations and the directions they were taken in are shown in
Figure 12. For each location, renders were created to show Phase 1 and 2 mining, the
reclamation scenario where the processing area remains, and final reclamation. Each key
observation point is described in more detail below.
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Figure 12. Key Observation Point Locations Surrounding North Hangs
KOP 6
KOP 3
KOP 5
KOP 4
KOP 1
KOP 2
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Key Observation Point 1
The first key observation point is located on westbound I-70 near the site entrance facing west.
This location is facing the western portion of the processing area with the mining area in the
background. During mining, the vegetated berm and transplanted trees in place near the site
entrance block the view of the processing area and the majority of the pit. After reclamation, the
lake will be visible in the distance with screening from the trees in place during mining and
newly planted trees. The original image is shown in Figure 13 while the renders are shown in
Figure 14. KOP 1 Mining Render through Figure 17..
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Figure 13. KOP 1 Baseline Photo
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Figure 14. KOP 1 Mining Render
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Figure 15 – KOP 1 Phase 2 Mining Render
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Figure 16. KOP 1 Reclamation and Processing Area Render
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Figure 17. KOP 1 Final Reclamation Render
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Key Observation Point 2
The second key observation point is at the same location as KOP 1 on westbound I-70 facing
east. This point is in view of the processing area and site entrance, with the mining area in the
background. During mining, the vegetated berms at the site entrance block the majority of the
processing area and pit. Trees will also be transplanted along the berm to aid in screening of
the processing area. However, the eastern portion of the processing area where the office and
scale are located are partially visible. The background vegetation will be thinned out and more
of the ridge in the distance will become visible as the trees within the mining area are removed.
During the reclamation scenario where the processing area remains, the site is not anticipated
to have drastic visual changes compared to during mining. After final reclamation, the eastern
portion of the reclamation pond and some wetlands will be visible through the newly planted
trees. The original photo from this view is shown in Figure 18. KOP 2 Baseline Photo while the
renders are shown in Figure 19. and Figure 20..
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Figure 18. KOP 2 Baseline Photo
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Figure 19. KOP 2 Render of Phase 1 Mining, Phase 2 Mining, and Reclamation with Processing Area
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Figure 20. KOP 2 Final Reclamation Render
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Key Observation Point 3
The third key observation point is located at the western end of the site on westbound I-70
facing west. This point is facing the southwest portion of the site where the southern portion of
the pit will extend to. During phase 1 of mining, the plant area and road leading to it will be
partially visible through the berm and transplanted trees. During phase 2 of mining, a small
area of the pit will be visible. In the reclamation scenario where processing remains at the site,
the plant area and road will be visible with newly developed wetlands in the background. After
final reclamation, the area will show rangeland and wetlands. The original photo of this
observation point can be seen in Figure 21 while the renders can be seen in Figure 22. through
Figure 25..
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Figure 21. KOP 3 Baseline Photo
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Figure 22. KOP 3 Phase 1 Mining Render
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Figure 23. KOP 3 Phase 2 Mining Render
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Figure 24. KOP 3 Reclamation with Processing Area Render
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Figure 25. KOP 3 Final Reclamation Render
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Key Observation Point 4
The fourth key observation point is located on the eastern side of the site on eastbound I-70
facing northeast. It is facing the northeastern portion of the mine and the furthest east portion of
the processing area. During mining, the berm in front of the processing area will be visible and
the vegetation from on site will be thinned out revealing more of the ridge behind the mine.
Natural topographic conditions will hide this area of the pit. After reclamation, a small portion of
the newly developed wetlands will be seen. The original photo of this observation point can be
seen in Figure 21 while the renders can be seen in Figure 22. through Figure 25..
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Figure 26. KOP 4 Baseline Photo
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Figure 27. KOP 4 Render of Phase 1 Mining and Phase 2 Mining
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Figure 28. KOP 4 Reclamation with Processing Area Render
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Figure 29. KOP 4 Final Reclamation Render
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Key Observation Point 5
The fifth key observation point is located on the ridge to the north of the site along Highway 6.
The North Hangs site can be seen in the distance to the southwest. This location represents the
view from residents on the western end of the Town of Silt. As shown in the photo, the
topography along the south side of Highway 6 obscures a significant amount of the view. The
eastern half of the site is visible from the nearest neighbor showing most of the processing area
and the eastern portion of the pit. Because the site is barely visible in the distance, few changes
between the different phases of mining are visible. After final reclamation, the entire visible area
is rangeland and wetlands. The original photo of this observation point can be seen in Figure
30. while the renders are shown in Figure 31. through Figure 34..
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Figure 30. KOP 5 Baseline Photo
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Figure 31. KOP 5 Phase 1 Mining Render
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Figure 32. – KOP 5 Phase 2 Mining Render
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Figure 33. KOP 5 Reclamation with Processing Area Render
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Figure 34. – KOP 5 Final Reclamation Render
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Key Observation Point 6
The sixth observation point is located on the ridge off Highway 6 to the northwest of the site.
The photo was taken from the driveway of the other nearest neighbor that can view the mine.
The North Hangs site can be seen in the distance to the southeast. The western side of the site
can be seen in this direction showing the concrete plant, pit, and processing area during mining.
The pit expands from phase 1 to phase 2 which will show an increase in disturbance from this
view. After reclamation, both with and without the processing area, the reclamation lake is
primarily what will be seen from this view. The original photo from this observation point can be
seen in Figure 35. while the renders can be seen in Figure 36. through Figure 38..
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Figure 35. KOP 6 Baseline Photo
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Figure 36. KOP 6 Phase 1 Mining Render
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Figure 37. KOP 6 Phase 2 Mining Render
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Figure 38. KOP 6 Render of Reclamation with Processing Area and Final Reclamation
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Screening Trees
Trees will be planted in two locations on the site in order to provide a visual screen for the Town
of Silt and the I-70 corridor. Trees will be planted to in-fill the existing trees on the north side of
the site along the Colorado River in order to mitigate the visual impacts to the Town of Silt.
These infill trees will be planted near the Colorado River in locations that will not be affected by
Phase 1 or Phase 2 of mining. Trees will also be planted along the south edge of the processing
area and stockpile area to mitigate the visual impacts to the I-70 corridor. These trees will be a
mix of new seeding and transplanted trees removed from areas to be mined. See Map F-2 for
the locations of tree plantings. In addition to the installation of screening trees, the phasing of
the mining operation will contribute to the mitigation of the visual impacts of the operation.
Phase 1 mining will not result in a significant removal of trees that are within a 250-foot buffer
along the Colorado River, and Phase 2 will be conducted at a later time, by which time the in-fill
plantings within the 100 foot buffer will be well established. Tree removal will be limited to those
trees that are currently in the footprint of the mining cells. The approval of this SUP will allow
WSM to begin the planting of these screening trees at the earliest possible date, thus improving
their effectiveness as visual mitigation tools.
5. County Road System
Prior to the commencement of mining activities, a traffic study was conducted by Kimley-Horn
and Associates Inc. (Kimley-Horn) for the proposed North Hangs Mine, a copy of which is
attached to this application. Based on the analysis presented in the report, Kimley-Horn believes
North Hangs Mine will be successfully incorporated into the existing and future roadway network
without the need for any traffic improvements. All project intersections are expected to operate
acceptably throughout the 2037 study horizon with their existing lane configuration and control.
Operational practices to control traffic will include:
• Installation of any improvements at the intersection of County Road 316 and Mamm
Creek Road (County Road 315) as required by Garfield County
• Maintenance of signage and speed limits for truck traffic entering and leaving the
frontage road
• Usage of a one-way traffic routing in the facilities area to minimize customer truck travel
distance and time
• Maintenance of a designated parking area away from stockpiles and internal traffic
• Usage of a designated maintenance area for all minor equipment maintenance such as
greasing and refueling in the facilities area
• Tracking pads will be used at all entrances to the site to ensure sediment and mud
control
4.1.
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6. Compatibility with Surrounding Land Uses
The North Hangs Mine is compatible with the surrounding land uses which include; an existing
gravel pit, the I-70 transportation corridor, and rangeland. The final uses of the North Hangs
Mine after reclamation will be rangeland, a groundwater lake, wetlands, and a processing area.
These uses are also compatible with the current surrounding land uses.
7. Revegetation and Reclamation
Revegetation and Reclamation of the North Hangs Mine will be conducted as described in
Exhibit E of the CDRMS permit application in Appendix 4.
Prior to mining, a weed survey will be conducted and an inventory of county and state-listed
weeds along with a detailed weed management plan will be provided to Garfield County.
8. Wildlife/Vegetation
Prior to the commencement of mining activities, a wildlife/vegetation study was conducted for
the proposed North Hangs Mine by Steve D. Dahmer, Principal Ecologist at Environmental
Solutions, Inc., a copy of which is attached to this mitigation plan. The proposed project will
result in removal of a significant amount of rock and gravel resources below the existing grade,
which will result in the creation of one large groundwater lake on the Property. As part of the
mitigation measures, pond depth, shoreline slopes and layout as well as submerged slopes will
all be designed to establish a variety of habitat types to meet requirements of a diverse array of
wildlife species. This will include creation of fish habitat, including deepwater habitats, as well as
perennial wetland vegetation communities, both emergent and wet-meadow types. Mitigation
will include planting of a broad selection of wetland and upland species to maximize the
productivity and diversity of habitats on the Property. Creation of the lake will result in increased
diversity by adding a variety of fish habitat, including deep water, and a great deal of “edge”,
which is how biologists define the convergence of two or more habitat types. In general, the final
use of the site will increase the value of the Property as a wildlife area.
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Appendix 1 – Noise Analysis
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Appendix 2 – Environmental Impact Analysis
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Appendix 3 – Geologic Hazard Analysis
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Appendix 4 – CDRMS Application
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Appendix 5 – SPCC Plan
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Appendix 6 – Stormwater Management Plan
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Appendix 7 – Other Items
Wetland Delineation
Town of Silt Letter
Fire District Letter
Typical Concrete Batch Plant
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