HomeMy WebLinkAboutApplicationGaffield County
GRADING PERMIT
APPLICATIONCommunity Development Department
108 8th Street, Suite 401
Glenwood Springs, CO 81601
(970194s-82L2
www.sarfield-countv.com
OF GRADING
MAJOR tr MINOR
INVOLVED PARTIES
Property owner: Chad Campbell 03 294-2177Phone:
Mailing Address:1800 Larimer Street, Suite 1300
EmailAddress:chad. cam pbell @xcelenergy. com
contractor: Chad CamPbell pt one, É03 294-2177I
Mailing Address 1800 Larimer Street, Suite 1300
EmailAddress:chad.campbell@xcelenergy. com
Architect:Phone: ( )
Mailing Address
EmailAddress:
Engineer:EN Engineering Phone .í20 I 8e3-5731
Mailing Address:9777 Pyramid Ct, Suite 300, Lakewood, CO 80112
EmailAddress:batherton@enengineering.com Note: \NWE suppl¡ed temporary controls on grading plans (ikeyes@wrightwater.com)
PROJECT NAME AND LOCATION
Project Name . Rifle Compresso r Station Recommissioning Project
Describe Work:This project will update and return-to-service a Xcel natural gas compression facility by demolishing
and/or removing existing equipment and installing similar replacements. The demolition scope of work will include removal
of the existing building, above and below grade piping,and other minor site appurtenances. This will be followed
by site preparatio n and civilwork, then installation of new piping, building, & compressor
Job Address:770 CR 264, Rifle, CO 81650
Assessol's Parcel Number:
Sub.
217718200287
Lot _Block
Earthwork (square feet):-39,204 Earthwork (Cu bic Yards) :
ALL UTILITIES MUST BE LOCATED PRIOR TO ANY GRADING
NOTICE
Authoritv. This application for a Building Permit must be signed by the Owner of the property, described above, or
anauthorizedagent. lfthesignaturebelowisnotthatoftheOwner,aseparateletterofauthority,signedbythe
Owner, must be provided with this Application.
Lesal Access. A Buildíng Permit cannot be issued without proof of legal and adequate access to the property for
purposes of inspections by the Building Division.
Other Permits. Multiple separate permits may be required: (1) State Electrical Permit, (2) County OWTS Permit,
(3) another permit required for use on the property identified above, e.g. State or County Highway/ Road Access or
a State Wastewater Discharge Permit.
Void Permit. A Building Permit becomes null and void if the work authorized is not commenced within 180 days of
the date of issuance and if work is suspended or abandoned for a period of 180 days after commencement.
CERTIFICATION
I hereby certify that I have read this Application and that the information contained above is true and correct. I
understand that the Building Division accepts the Application, along with the plans and specifications and other
data submitted by me or on my behalf (submittals), based upon my certification as to accuracy. Assuming
completeness of the submittals and approval of this Application, a Building Permit will be issued granting
permission to me, as Owner, to construct the structure(s) and facilities detailed on the submittals reviewed by the
Building Division. ln consideration of the issuanceof the Building Permit, lagreethatland myagentswill comply
with provisions of any federal, state or local law regulating the work and the Garfield County Building Code, OWTS
regulations and applicable land use regulations (County Regulation(s)). I acknowledge that the Building Permit
may be suspended or revoked, upon notice from the County, ifthe location, construction or use ofthe structure(s)
and facility(ies), described above, are not in compliance with County Regulation(s) or any other applicable law.
I hereby grant permission to the Building Division to enter the property, described above, to inspect the work. I
further acknowledge that the issuance of the Building Permit does not prevent the Building Official from: (1)
requiring the correction of errors in the submittals, if any, discovered after issuance; or (2) stopping construction
or use of the structure(s) or facilíty(ies) if such is in violation of County Regulation(s) or any other applicable law.
Review of this Application, including submittals, and inspections of the work by the Building Division do not
constitute an acceptance of responsibility or liability by the County of errors, omissions or discrepancies. As the
Owner, I acknowledge that responsibility for compliance with federal, state and local laws and County Regulations
rest with me and my authorized agents, including without limitation my architect desígner, engineer and/ or
builder.
I hereby acknowledge that t have read and understand the Not¡ce and Cert¡fication above as well as
have provided the requ¡red information which is correct and accurate to the best of my knowledge.
Chad Cam pbel I 3:''åi'rry,;'åäå',3',îi11.?îåffi1' 61 1 612022
Property Owner Print and Sign Date
OFFICIAT USE ONLY
täUt ô! o\^rne,rs ns\'
'9,iÅä.*ôôìAMisc Fees:
\\'"'3'{ö0.*
&/6-2Z
lssue Date:
f2r
Zoning:Grading Perinit:
CrQStìr l+l\
Balance due:
4 6.*
r/l-z>BUILD¡NG / PLANNING DIVISION
Signed Approval
I
Date
Lt,J,í&1
MOUNT¡TIN CROSS
ENGTNEERING, INC.
Givil and Envlronmental Consulting and Deslgn
August 12,2022
Mr. Glenn Hartman
Garfield County Planning
108 8th Street, Suite 401
Glenwood Springs, CO 81601
RE: Rifle Compressor Station - Grading Permit, Xcel Energy: GRAD-7711
Dear Glenn:
This ofÍice has reviewed the documents provided for the Grading Permit application of Xcel
Energy. The submittal was found to be thorough and well organized. The revier,v generated no
comments.
Feel fi'ee to call if you have any questions or comments.
Sincerely,
Mountain Inc.
PE
826'hGrand Avenue, Glenwood Springs, CO 81601
P: 970.945.5544 F : 97 0,945.5558 www.mountaincross-eng.com
1800 Larimer Street, Suite 1300
Denver, Colorado 80202
Telephone: (303) 294-2177
chad.campbell@xcelenergy.com
June 28, 2022
Glenn Hartmann, Principal Planner
Garfield County Community Development Department
108 8th Street
Glenwood Springs, CO 81601
RE: Rifle Compressor Station Recommissioning Project, Grading Permit Application
Public Service Company of Colorado (PSCo), dba Xcel Energy, is proposing to construct, operate, and
maintain the Rifle Compressor Station Recommissioning Project (Project) in unincorporated Garfield
County, Colorado. This Project will update and return-to-service PSCo’s existing natural gas compression
facility in the same footprint.
Enclosed is the Grading Permit application for the Project. We look forward to your review of the
application submittal. If you have any questions, please contact me at (303) 294-2177 or email at
chad.campbell@xcelenergy.com or contact our environmental consultant, Jennifer Keyes with Wright
Water Engineers, Inc., at (303) 480-1700 or jkeyes@wrightwater.com.
Sincerely,
Chad Campbell, Manager – Air & Water
Environmental
Xcel Energy
Attachments:
Attachment A. Grading Permit Application
Attachment B. Colorado Discharge Permit System Application
Attachment C. Drainage Report
Attachment D. Grading Plan
Attachment E. Erosion and Sediment Control Plans
Attachment A: Grading Permit Application
This page intentionally left blank.
Community Development Department
108 8th Street, Suite 401
Glenwood Springs, CO 81601
(970) 945-8212
www.garfield-county.com
GRADING PERMIT
APPLICATION
TYPE OF GRADING
MAJOR MINOR
INVOLVED PARTIES
Property Owner: _________________________________________ Phone: (______)_________________
Mailing Address: _______________________________________________________________________
Email Address: _________________________________________________________________________
Contractor: _____________________________________________ Phone: (______)_________________
Mailing Address: _______________________________________________________________________
Email Address: _________________________________________________________________________
Architect: ______________________________________________ Phone: (______)_________________
Mailing Address: _______________________________________________________________________
Email Address: _________________________________________________________________________
Engineer: ______________________________________________ Phone: (______)_________________
Mailing Address: _______________________________________________________________________
Email Address: _________________________________________________________________________
PROJECT NAME AND LOCATION
Project Name:_________________________________________________________________________
Describe Work: ________________________________________________________________________
______________________________________________________________________________________
_____________________________________________________________________________________
______________________________________________________________________________________
Job Address: __________________________________________________________________________
______________________________________________________________________________________
Assessor’s Parcel Number: ______________________________________________________________
Sub. ______________________________________ Lot ________________ __Block ________________
Earthwork (square feet): _______________________ Earthwork (Cubic Yards): ____________________
■
Chad Campbell
1800 Larimer Street, Suite 1300
chad.campbell@xcelenergy.com
Chad Campbell 303
1800 Larimer Street, Suite 1300
chad.campbell@xcelenergy.com
EN Engineering 720
9777 Pyramid Ct, Suite 300, Lakewood, CO 80112
batherton@enengineering.com Note: WWE supplied temporary controls on grading plans (jkeyes@wrightwater.com)
Rifle Compressor Station Recommissioning Project
This project will update and return-to-service a Xcel natural gas compression facility by demolishing
and/or removing existing equipment and installing similar replacements. The demolition scope of work will include removal
of the existing building, above and below grade piping,and other minor site appurtenances. This will be followed
by site preparation and civil work, then installation of new piping, building, & compressor.
770 CR 264, Rifle, CO 81650
217718200287
~39,204
303 294-2177
294-2177
893-5731
ALL UTILITIES MUST BE LOCATED PRIOR TO ANY GRADING
NOTICE
Authority. This application for a Building Permit must be signed by the Owner of the property, described above, or
an authorized agent. If the signature below is not that of the Owner, a separate letter of authority, signed by the
Owner, must be provided with this Application.
Legal Access. A Building Permit cannot be issued without proof of legal and adequate access to the property for
purposes of inspections by the Building Division.
Other Permits. Multiple separate permits may be required: (1) State Electrical Permit, (2) County OWTS Permit,
(3) another permit required for use on the property identified above, e.g. State or County Highway/ Road Access or
a State Wastewater Discharge Permit.
Void Permit. A Building Permit becomes null and void if the work authorized is not commenced within 180 days of
the date of issuance and if work is suspended or abandoned for a period of 180 days after commencement.
CERTIFICATION
I hereby certify that I have read this Application and that the information contained above is true and correct. I
understand that the Building Division accepts the Application, along with the plans and specifications and other
data submitted by me or on my behalf (submittals), based upon my certification as to accuracy. Assuming
completeness of the submittals and approval of this Application, a B uilding Permit will be issued granting
permission to me, as Owner, to construct the structure(s) and facilities detailed on the submittals reviewed by the
Building Division. In consideration of the issuance of the Building Permit, I agree that I and my agents will comply
with provisions of any federal, state or local law regulating the work and the Garfield County Building Code, OWTS
regulations and applicable land use regulations (County Regulation(s)). I acknowledge that the Building Permit
may be suspended or revoked, upon notice from the County, if the location, construction or use of the structure(s)
and facility(ies), described above, are not in compliance with County Regulation(s) or any other applicable law.
I hereby grant permission to the Building Division to enter the property, described above, to inspect the work. I
further acknowledge that the issuance of the Building Permit does not prevent the Building Official from: (1)
requiring the correction of errors in the submittals, if any, discovered after issuance; or (2) stopping construction
or use of the structure(s) or facility(ies) if such is in violation of County Regulation(s) or any other applicable law.
Review of this Application, including submittals, and inspections of the work by the Building Division do not
constitute an acceptance of responsibility or liability by the County of errors, omissions or discrepancies. As the
Owner, I acknowledge that responsibility for compliance with federal, state and local laws and County Regulations
rest with me and my authorized agents, including without limitation my architect designer, engineer and/ or
builder.
I hereby acknowledge that I have read and understand the Notice and Certification above as well as
have provided the required information which is correct and accurate to the best of my knowledge.
______________________________________________________ __________________________
Property Owner Print and Sign Date
OFFICIAL USE ONLY
Special Conditions:
Permit Fee: Misc Fees: Total Fees: Fees Paid:
Balance due: Grading Permit: Issue Date: Zoning:
BUILDING / PLANNING DIVISION : __________________________________________________ ____________________
Signed Approval Date
6/16/2022Chad Campbell Digitally signed by Chad Campbell
Date: 2022.06.16 20:41:37 -06'00'
Attachment B. Colorado Discharge Permit
System Application
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A. PERMIT INFORMATION
Reason for Application
þ NEW CERT ¨RENEW CERT
¨MODIFICATION ¨TRANSFER
¨CHANGE OF CONTACT ¨TERMINATION
Existing Cert #
B. PERMITTED PROJECT/FACILITY INFORMATION
Facility Name:Rifle Compressor Station Recommissioning
Project
Original ID:
Property Address 1:770 CR 264 Property Address 2:County:Garfield
City:Unincorporated State:CO Zip Code:81650
Latitude :39.5293 Longitude :-107.82693
SIC Code Description
1623 Water, sewer, and utility lines
C. CONTACT INFORMATION
Receiving Water Name Receiving Water Type
Summit County MS4 incl. roadside swales Immediate
Pioneer Ditch Immediate
Colorado River Ultimate
ASSIGNED PERMIT NUMBER
Date Received 06/20/2022 06:15:29
MM DD YYYY HH:MM:SS
Revised: 3-2016
STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION
COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED.
Any additional information that you would like the Division to consider in developing the permit should be provided with
the application. Examples include effluent data and/or modeling and planned pollutant removal strategies.
Beginning July 1, 2016, invoices will be based on acres disturbed.
DO NOT PAY THE FEES NOW – Invoices will be sent after the receipt of the application.
Disturbed Acreage for this application (see page 4)
¨Less than 1 acre ($83 initial fee, $165 annual fee)
¨1-30 acres ($175 initial fee, $350 annual fee)
¨Greater than 30 acres ($270 initial fee, $540 annual fee)
1 OF 4
1) *OPERATOR – RESPONSIBLE OFFICIAL - the party that has operation control over day to day activities – may be the same as the
Owner
Responsible Person (Title): Manager of
Environmental
Services
First Name:Chad Last Name:Campbell
Telephone No:303-294-2177 Email Address:chad.campbell@xcelenergy
.com
Organization: Public Service Company
of Colorado
Mailing Address:1800 Larimer Street
City:Denver State:CO Zip Code:80202
2) *PROPERTY OWNER (CO-PERMITTEE) RESPONSIBLE OFFICIAL
Responsible Person (Title): Manager of
Environmental
Services
First Name:Chad Last Name:Campbell
Telephone No:303-294-2177 Email Address:chad.campbell@xcelenergy.c
om
Organization: Public Service Company of
Colorado
Mailing Address:1800 Larimer Street
City:Denver State:CO Zip Code:80202
3) *SITE CONTACT (local contact for questions relating to the facility & discharge authorized by this permit)
Responsible Person (Title): Environmental
Analyst
First Name:Cade Last Name:Wilson
Telephone No:970-819-8193 Email Address:cade.a.wilson@xcelenergy.
com
Organization: Public Service Company of
Colorado
Mailing Address:1800 Larimer Street
City:Denver State:CO Zip Code:80202
4) *BILLING CONTACT
Responsible Person (Title): Manager of
Environmental
Services
First Name:Chad Last Name:Campbell
Telephone No:303-294-2177 Email Address:chad.campbell@xcelenergy
.com
Organization: Public Service Company of
Colorado
Mailing Address:1800 Larimer Street
City:Denver State:CO Zip Code:80202
5) OTHER CONTACT TYPES
Title First
Name
Last
Name
Phone Email Address City State Zip Contact Type Other
6) Former Permittee (transfer)
Responsible Person (Title): First Name:Last Name:
Email Address:Company:
D. LEGAL DESCRIPTION
Legal description: if subdivided, provide the legal description below, or indicate that it is not applicatable. Do not supply Township/Range/Section
or metes and bounds description of the site.
Subdivision(s): Lot(s):Block(s):
OR
þ Not applicable (site has not been subdivided)
¨Facility additional description info
2 OF 4
F. NATURE OF CONSTRUCTION ACTIVITY
Check the appropriate box(s) or provide a brief description that indicates the general nature of the construction activities. (The full description of
activities must be included in the Stormwater Management Plan.)
¨Commercial Development ¨Residential Development ¨Highway and Transportation Development
þ Pipeline and Utilities (including natural gas, electricity, water, and communications)
¨Oil and Gas Exploration and Well Pad Development
¨Non-structural and other development (i.e. parks, trails, stream realignment, bank stabilization, demolition, etc.)
¨Other
G. ANTICIPATED CONSTRUCTION SCHEDULE
Construction Start Date:07/11/2022 Final Stabilization Date:10/30/2023
• Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating, demolition,
and grading activities.
• Final Stabilization Date - in terms of permit coverage, this is when he site is finally stabilized. This means that all ground surface disturbing
activities at the site have been completed and all disturbed areas have either been built on, paved, or a uniform vegetative cover has been
established with an individual plant density of at least 70 percent of pre-disturbance levels.
• Permit coverage must be maintained until the site is finally stabilized. Even if you are only doing one part of the project, the estimated final
stabilization date must be for the overall project. If permit coverage is still required once your part is completed, the permit certification may be
transferred to a new responsible operator.
SIGNATURE REQUIREMENTS:
TERMINATION CERTIFICATION
¨By checking this box I understand that by submitting this notice of termination, I am no longer authorized to discharge stormwater
associated with construction activity by the general permit. I understand that discharging pollutants in stormwater associated with
construction activities to the waters of the State of Colorado, where such discharges are not authorized by a CDPS permit, is unlawful
under the Colorado Water Quality Control Act and the Clean Water Act.
þ STORMWATER MANAGEMENT PLAN CERTIFICATION (on new and renewals)
By checking this box “I certify under penalty of law that a complete Stormwater Management Plan, has been/or will be completed, prior to
the commencement of any construction activity. Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the Stormwater Management Plan is/or will be, to the best of my knowledge and belief,
true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including
the possibility of fine and imprisonment for knowing violations.”
THIS PORTION OF THE SIGNATURE LANGUAGE IS REQUIRED ON ALL SUBMITTALS
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my
knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the
possibility of fine and imprisonment for knowing violations."
“I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated
with Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or
the certification is transferred, inactivated, or expired.”
E. AREA OF CONSTRUCTION SITE
Total area of construction site 1.8 acres
Total area of project disturbance 1.5 acres
3 OF 4
Signature of Operator Date Signed
Name (printed)Title
Signature of Owner Date Signed
Name (printed)Title
Signature: The applicant must be either the owner and operator of the construction site. Refer to Part B of the instructions for additional information.
The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows:
(Regulation 61.4 (1ei)
a) In the case of corporations, by the responsible corporate officer is responsible for the overall operation of the facility from which the discharge
described in the form originates
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, (a principal executive
officer has responsibility for the overall operation of the facility from which the discharge originates).
FORMER PERMITTEE used for transfers
Signature (Legally Responsible Party)Date
Name (printed)Title
4 OF 4
Attachment C. Drainage Report
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FINAL DRAINAGE REPORT FOR THE
PUBLIC SERVICE COMPANY OF COLORADO
RIFLE COMPRESSOR STATION RECOMMISSIONING PROJECT
Project Name
Public Service Company of Colorado Rifle Compressor Station Project
Project Location
Rifle Compressor Station
Unincorporated Garfield County
Rifle, CO 81650
Prepared By
Wright Water Engineers
2490 W. 26th Avenue, Suite 100A
Denver, CO 80211
303-480-1700
Date
June 24, 2022
ii
Engineer’s Statement
I hereby attest that this Drainage Report for the Rifle Compressor Station Recommissioning
Project has been prepared by me or under my direct supervision, and to the best of my
knowledge and ability has been prepared in accordance with the latest version of the Garfield
County Criteria. The signature and stamp affixed hereon certifies that this document was
prepared in accordance with the required regulations and criteria; however, the stamp and
signature does not certify or guarantee future performance of the execution of the plan by the
contractor. The contractor is responsible for executing the construction work according to the
information set forth in the plan and in accordance with all applicable requirements.
_____________________________________________________
Ian Paton, P.E.
Registered Professional Engineer
State of Colorado No. 41756
i
TABLE OF CONTENTS
Page
1 INTRODUCTION ............................................................................................................... 1
1.1 Background ......................................................................................................................... 1
1.2 Project Location .................................................................................................................. 2
1.3 General Project Approach for Grading and Drainage ......................................................... 2
1.4 Property Description............................................................................................................ 2
1.4.1 General Site History .......................................................................................... 2
1.4.2 Ground Cover and Vegetation .......................................................................... 2
1.4.3 Soils and Topography ....................................................................................... 3
1.4.4 Drainage and Irrigation Features ...................................................................... 3
1.5 Previous Investigations ....................................................................................................... 3
2 DRAINAGE SYSTEM DESCRIPTION .............................................................................. 4
2.1 Existing Drainage Conditions .............................................................................................. 4
2.1.1 Off-Site Watershed Hydrology and Drainage ................................................... 4
2.1.2 Existing Topography ......................................................................................... 4
2.1.3 Existing Drainage Features .............................................................................. 4
2.2 Master Drainage Plan ......................................................................................................... 5
2.3 Proposed Drainage System ................................................................................................ 5
2.3.1 Offsite Tributary Drainage ................................................................................. 6
2.3.2 Project Site Drainage ........................................................................................ 6
2.4 Drainage Facility Maintenance ............................................................................................ 7
3 DRAINAGE ANALYSIS AND DESIGN CRITERIA .......................................................... 7
3.1 Regulations ......................................................................................................................... 7
3.2 Hydrologic Analysis ............................................................................................................. 8
3.3 Hydraulic Analysis ............................................................................................................... 8
3.4 Development Criteria .......................................................................................................... 8
4 POST CONSTRUCTION STORMWATER MANAGEMENT ............................................ 9
4.1 Stormwater Quality Control Measures ................................................................................ 9
5 CONCLUSIONS ................................................................................................................ 9
6 REFERENCES ................................................................................................................ 10
ii
FIGURES (END OF REPORT)
Figure 1 General Location Map
APPENDICES (END OF REPORT)
A Soil Survey Reports
B On-Site Hydrology Calculations – Rational Method
C Off-Site Hydrology Calculations – USGS StreamStats
D Drainage Report Drawings
E Photo Log
091-034.7900 Wright Water Engineers, Inc. Page 1
June 2022
FINAL DRAINAGE REPORT FOR
THE PUBLIC SERVICE COMPANY OF COLORADO
RIFLE COMPRESSOR STATION RECOMMISSIONING PROJECT
1 INTRODUCTION
1.1 Background
This report was prepared by Wright Water Engineers, Inc. (WWE) on behalf of the Public
Service Company of Colorado (PSCo), a Colorado Corporation, to summarize an engineering
analysis of the drainage considerations for a proposed project by PSCo to upgrade the existing
Rifle Compressor Station located in unincorporated Garfield County near the City of Rifle (see
Figure 1, Location Map, at end of report). The planned work will include a demolition phase,
involving the removal of an existing building and above- and below-grade piping, as well as
other site features. The demolition work will be followed by site preparation and grading, then
installation of new piping, a new building, and a compressor (these proposed tasks are
collectively referred to in this report as the “Project”). Future phases of the Project potentially
include a building extension and second compressor installation in 2023 or later. Disturbed areas
will be graded to maintain the existing drainage characteristics to the extent possible.
It is noted that while WWE prepared this report, the engineering design for the proposed Project,
including the preparation of plans and specifications, is being performed on behalf of PSCo by
EN-Engineering.
The purpose of this report is to describe the following:
•The hydrology and drainage conditions prior to the proposed upgrades at the site.
•The proposed grading, hydrology and drainage of the site. This includes identifying and
addressing potential drainage conditions and concerns that may occur either on-site or
off-site as a result of the upgrades.
•The proposed final design and drainage details for the Project area.
Final Drainage Report for the PSCo Rifle Compressor Station Recommissioning Project
091-034.7900 Wright Water Engineers, Inc. Page 2
June 2022
The analysis presented in this report was prepared in accordance with the provisions of Garfield
County’s Land Use and Development Code. Details of the Code as it pertains to this drainage
report are provided in Section 3.2.
1.2 Project Location
The Project site is located west of Rifle, Colorado on County Road 264 and directly north of U.S.
Highway 6 and the Colorado River in Section 13, Township 6 South, Range 94 and in Section
18, Township 6 South, Range 93 West of the 6th Principle Meridian (see Figure 1).
1.3 General Project Approach for Grading and Drainage
The approach used to develop the grading and drainage plans for this Project is based on the
following objectives:
•Minimize earth work and disturbance associated with the Project;
•Maintain existing drainage patterns and local drainage features; and
•Infiltrate runoff where feasible and minimize concentrated flows.
1.4 Property Description
1.4.1 General Site History
The Rifle Compressor Station is an existing facility used for the transport of natural gas. The
property was described as vacant land before it was purchased in 1991 by the Western Gas
Supply Company. The Project site is 1.2 acres and includes an existing building, gravel berm,
above- and below-grade steel gas lines, equipment pads, and culverts for site drainage. An
overhead power line is approximately 30 feet south of and parallel to the southern property line
of the Project site.
1.4.2 Ground Cover and Vegetation
The existing Project area is covered primarily by gravel with no vegetation. Non-developed land
contiguous with the Project site is covered by vegetation consisting of grasses and brush. The
Final Drainage Report for the PSCo Rifle Compressor Station Recommissioning Project
091-034.7900 Wright Water Engineers, Inc. Page 3
June 2022
drainage basins adjacent to the Project area have a sparse cover consisting of grasses, sagebrush
and rock outcrops.
1.4.3 Soils and Topography
According to the Natural Resources Conservation Service (NRCS), soils in the project area are
comprised primarily of Arvada loam (Hydrologic Soil Group [HSG] C). These soils have a slow
infiltration rate when thoroughly wetted. Soils information for the project area is provided in
Appendix A.
The project area is relatively level with slopes ranging from 2 to 6 percent. The drainage basin
upgradient of the site is steeper with a mean basin slope of 22 percent.
1.4.4 Drainage and Irrigation Features
Existing constructed drainage facilities around and inside the Project area include a roadside
swale and culverts. These facilities are described further in Section 2.1.2, “Existing Drainage
Features.” Other important drainage features near the site include the following:
•Pioneer Ditch (fed by Rifle Creek) – A channel that runs from east to west and receives
the runoff from the Project site prior to its confluence with the Colorado River.
•Colorado River – Located south of the Project area and Pioneer Ditch. The Colorado
River is the ultimate receiving water for runoff from the Project site.
1.5 Previous Investigations
There are no known existing drainage reports or published floodplain maps for this facility or
adjacent areas. A Flood Insurance Study was prepared for the unincorporated areas of Garfield
County, Colorado in 2006 to be used to update existing floodplain mapping (FEMA 2006). As
indicated in the report, many small tributary washes near Pioneer Ditch were studied by
approximate methods as a result of having low development potential or minimal flood hazards.
Final Drainage Report for the PSCo Rifle Compressor Station Recommissioning Project
091-034.7900 Wright Water Engineers, Inc. Page 4
June 2022
2 DRAINAGE SYSTEM DESCRIPTION
2.1 Existing Drainage Conditions
A photo log of the existing drainage conditions is included in Appendix E.
2.1.1 Off-Site Watershed Hydrology and Drainage
The Project is located in a catchment that is tributary to Rifle Creek. The contributing watershed
upgradient from the Project site is 31 acres and is undeveloped with the exception of a 4.8-acre
gravel pad and a single 600-square feet building, which is located 130 feet directly north of and
upgradient from the Project site, on the north side of County Road 264 (see Figure 1). The land
cover in the contributing watershed is mainly sparsely vegetated with grasses and shrubs. It is
assumed that the future land use and drainage conditions in the tributary off-site basin will
remain the same as the conditions used for the hydrologic evaluation of the existing land use.
A United States Geological Survey (USGS) StreamStats analysis was generated to estimate peak
run-on originating from the upgradient basin. StreamStats applies regional regression equations
to estimate peak runoff statistics. The StreamStats results are provided in Appendix C.
The runoff from the drainage area upgradient from the Project site is diverted around the project
site by drainage swales that run along County Road 264 (Photos 1-3 in Appendix E).
2.1.2 Existing Topography
The existing topography and drainage features of the Project area are shown on Sheet 01 in
Appendix D (at the end of the report). (Note: All survey data and proposed grading for the
Project site was provided by EN-Engineering).
2.1.3 Existing Drainage Features
The existing drainage pattern runs from north to south. Runoff from the area above (north of) the
Project site is collected via roadside ditches, which drain through culverts into drainage channels
east and west of the site. The existing channel to the west of the Project site is more heavily
Final Drainage Report for the PSCo Rifle Compressor Station Recommissioning Project
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June 2022
incised by the off-site runoff and has exposed a natural gas line along the south side of County
Road 264 immediately west of the Project site (Photo 5 in Appendix E).
There is a small drainage channel inside of the existing property on the east side and a culvert
which drains water east into the small ditch and away from the existing compressor building.
Runoff that is collected onsite ultimately flows south to two culverts and drains offsite into
existing incised drainage channels (Photos 8 and 9 in Appendix E). A sediment trap, roughly 10
feet by 10 feet, is located south of the property line (Photo 11 in Appendix E). The drainage
channels west, east and south of the property drain to Pioneer Ditch.
The drainage area in the pre-development (i.e., “existing”) site condition for the Project site is
shown on Sheet 01 (Appendix D). Runoff from the Project area flows generally from north to
south with slopes ranging between 2 and 6 percent. The Rational Method was applied to
calculate estimated peak runoff rates from the existing site. Estimates of the existing conditions
peak flow rates for the Minor Event (2-year, 1-hour storm event; 0.410-inch depth) and Major
Event (25-year, 1-hour storm event; 0.842-inch depth) are listed in Appendix B. A comparison of
the calculated runoff from the Project area for Minor and Major Events, for existing conditions
versus proposed post-Project conditions, are shown in Table 1 (Section 2.3.2).
2.2 Master Drainage Plan
To WWE’s knowledge, no master drainage plans have been developed related to the Project site.
2.3 Proposed Drainage System
The proposed grading and removal of existing structures, as designed and provided by EN-
Engineering, are shown on Sheets 02 and 03 (Appendix D). The overall goals of this plan
include the following:
•Preserve existing drainage patterns to maintain historic drainages into Pioneer Ditch;
•Leave existing drainage channels in the project area generally undisturbed; and
•Minimize soil disturbance.
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June 2022
Descriptions are provided below that address how both off-site and on-site stormwater is
collected and conveyed, respectively, either around or through the Project site. For those areas
where grading or other activities are proposed, the planned work is also described.
2.3.1 Offsite Tributary Drainage
Description: The 31-acre tributary drainage area is located outside of the Project area (north of
and upgradient from the project area). The undeveloped land cover consists mainly of sparse
vegetation. Flow from this drainage area is diverted by roadside swales north of and around the
project site into defined drainage channel to the east and west of the project site.
Flow Routing: The offsite tributary drainage does not receive inflow from any tributaries.
Offsite tributary drainage is tributary to the project site drainage.
Rifle Compressor Station Recommissioning Project Grading Activities: None (outside of Project
area).
Hydrologic Impact of Activities: The offsite tributary drainage, which is diverted around the
Project site, is outside of the Project area and therefore is not altered by the Project activities.
2.3.2 Project Site Drainage
Description: The 1.2-acre Project site drainage area contains a compressor station, above-grade
pipes, and a riprap berm. The post-Project site includes the addition of a compressor building
(and expansion) (1456 square feet), smaller instrument and control buildings (147 square feet),
concrete pad (502 square feet), riprap-covered slope (837 square feet), with the remainder of the
yard still covered in gravel. Runoff occurs as overland sheet flow. There is one existing culvert
to remain in the southeast end of the property. Runoff flows from north to south. Runoff is
routed off site at the south property boundary.
Flow Routing: The post-Project site drainage flows south and is routed offsite via a swale and
culvert. Flow is directed to the historic drainage channels that discharge into Pioneer Ditch
directly south of the site.
Rifle Compressor Station Recommissioning Project Grading Activities: 0.9-acre area of the site
is to be regraded. There is positive grading away from the proposed building. A riprap cut slope
is placed in the northwest corner to accommodate grading.
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June 2022
Hydrologic Impact of Activities: The post-Project site imperviousness will increase in the post-
development condition by 2,100 square feet (0.05 acre), resulting in a change in imperviousness
from 41 percent to 43 percent. Based on the hydrologic analysis of the post-Project conditions
(Table 1 and Appendix B), the change in peak runoff rates (for the 2-year and 25-year events) are
calculated to be minimal. Estimates of peak runoff comparing existing and post-development
conditions are included in Error! Reference source not found..
Table 1. Peak Runoff Rates: Existing Condition Versus Post-Development Condition.
Project Area
Condition
2-yr (cfs)5-yr (cfs)10-yr (cfs)25-yr (cfs)100-yr (cfs)
Existing 0.39 0.62 0.87 1.38 2.18
Post-
Development
0.42 0.65 0.92 1.43 2.23
2.4 Drainage Facility Maintenance
Due to the proposed conditions of this Project, no substantial new structural onsite drainage
facilities are proposed to be constructed.
During construction, stormwater inspections will be performed in accordance with the Colorado
Discharge Permit System (CDPS) General Permit for Stormwater Discharges Associated with
Construction Activities (CDPS Construction Stormwater Permit). Once the site has achieved
final stabilization per the CDPS Construction Permit, routine maintenance will occur to the on-
site drainage facilities, such as the culverts, to ensure they can function as planned.
3 DRAINAGE ANALYSIS AND DESIGN CRITERIA
3.1 Regulations
The drainage analysis for the Project was prepared in accordance with the provisions of the
Garfield County’s Land Use and Development Code, Article 7, Section 204: Drainage and
Erosion Standards.
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091-034.7900 Wright Water Engineers, Inc. Page 8
June 2022
3.2 Hydrologic Analysis
Hydrologic calculations for the Project area were prepared using the Mile High Flood District’s
UD-Rational workbook, Version 2.00. Rainfall intensities for the Project site are from NOAA
Atlas 14, Volume 8, Version 2.
Rainfall data and peak flow calculations are presented in Appendix B, On-Site Hydrology
Calculations. As noted in Section 2.1.3, estimates of the peak flow rates were calculated for the
Minor Event (2-year, 1-hour storm event; 0.410-inch depth) and Major Event (25-year, 1-hour
storm event; 0.842-inch depth). The calculations for the post-development scenario include the
future expansion of the compressor station building.
Peak runoff was estimated using the 2-year and 25-year return frequency, 1-hour duration storms
rather than the 2-year and 25-year, 24-hour duration storms described in Garfield County Land
Use and Development Code. The analysis uses 1-hour duration storms to be more conservative
(i.e., more protective), because the time of concentration for runoff at the project site is roughly
10 minutes, so 1-hour duration storms are more appropriate for the analysis of peak runoff rates.
3.3 Hydraulic Analysis
With the current proposed design, the change to the site hydrology does not warrant new
stormwater control measures and corresponding hydraulic analyses.
3.4 Development Criteria
There are no drainage constraints on the project area resulting from major drainage studies,
floodplain studies, or other drainage reports. Development of this drainage plan was based on
criteria for erosion and sedimentation, drainage, and stormwater runoff in Article 7, Section 204
of the Garfield County Land Use and Development Code:
Erosion and Sedimentation: The total development disturbed area is 0.9-acres for this project. A
temporary staging area offsite is not included in the analysis described in this Drainage Report,
but will result in the disturbance of an additional 0.6-acres. Because the combined disturbance is
1.5-acres, which is more than 1-acre, the site is subject to the CDPS Construction Stormwater
Permit.
Final Drainage Report for the PSCo Rifle Compressor Station Recommissioning Project
091-034.7900 Wright Water Engineers, Inc. Page 9
June 2022
Drainage: The purpose of the site design is to facilitate positive drainage away from all
buildings, in conjunction with the overall pattern of storm drainage for the site.
Stormwater Runoff: The post-Project site consists of 3,333 square feet of impervious surface
area. The Garfield County criteria [Article 7, Section 204] only apply to development with
10,000 square feet or more of impervious surface area. However, these standards were still
adopted for this Project, where applicable, to mitigate impacts downstream.
4 POST CONSTRUCTION STORMWATER MANAGEMENT
4.1 Stormwater Quality Control Measures
Measures described in this report that will provide a benefit to stormwater quality include
implementing construction stormwater Best Management Practices (BMPs). Erosion control
BMPs would be used during construction to minimize impacts to areas outside of the
construction footprint. Construction stormwater BMPs will be installed and maintained in
accordance with the construction stormwater permits (CDPS) and the site Stormwater
Management Plan. The BMPs will be inspected, maintained and in place until the site is fully
stabilized.
5 CONCLUSIONS
This report has been prepared in accordance with the procedures and concepts as outlined in the
Garfield County Land Use and Development Code using calculation methods described in the
Mile High Flood District’s Urban Storm Drainage Criteria Manual. There is no known FEMA
floodplain mapping for the Project area.
Historic drainage patterns of the site have been maintained to the extent practical, based on the
information available at the time of this report. Along the north side of the Project site, existing
roadside swales carries run-on away from the Project site. Runoff collected on-site will flow
south to maintain the existing drainage patterns. The on-site runoff is routed via drainage ditches
south of the property and ultimately discharges into Pioneer Ditch.
Final Drainage Report for the PSCo Rifle Compressor Station Recommissioning Project
091-034.7900 Wright Water Engineers, Inc. Page 10
June 2022
The proposed grading design maintains existing peak runoff rates and drainage flow paths. The
increase in the estimated peak flow rate when comparing the existing and post-development
conditions are negligible for the 2-year and 25-year return frequency storms (Error! Reference
source not found.). Results of the analysis indicate a new stormwater control measure is not
required to mitigate the increase in runoff.
6 REFERENCES
FEMA 2006. Flood Insurance Study Garfield County, Colorado Unincorporated Areas, Vol 1 of
2.
Garfield County 2013. Land Use and Development Code, Article 7, Section 204
MHFD 2017. Peak Runoff Prediction by the Rational Method – UD-Rational Workbook.
Version 2.00.
NRCS 2022. Custom Soil Resource Report for Rifle Area, Colorado, Parts of Garfield and Mesa
Counties.
USGS 2016. The StreamStats program, online at http://streamstats.usgs.gov, accessed on
05/17/2022.
Z:\Project Files\09\091-034\091-034.7900\Engineering\Drainage and Grading\Drainage Report\Draft_Rifle Compressor Stn_Drainage
Report_2022-06-15.doc
WRIGH T WATE R EN GIN EE RS , INC .
24 90 W 26 TH AVE 10 0A
DEN VE R, CO . 8 0211
(3 03 ) 480-170 0
PRO JEC T N O. 091-034.7900
GARFIELD COUNTY, CO
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SECT ION 13 AN D 18 , TO W NSH IP 6 SOU TH ,
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FIG UR E 1
St udy Area City of Rif le
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Rifle Cr eek
Denver
United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Rifle Area, Colorado,
Parts of Garfield and
Mesa Counties
Natural
Resources
Conservation
Service
May 17, 2022
Preface
Soil surveys contain information that affects land use planning in survey areas.
They highlight soil limitations that affect various land uses and provide information
about the properties of the soils in the survey areas. Soil surveys are designed for
many different users, including farmers, ranchers, foresters, agronomists, urban
planners, community officials, engineers, developers, builders, and home buyers.
Also, conservationists, teachers, students, and specialists in recreation, waste
disposal, and pollution control can use the surveys to help them understand,
protect, or enhance the environment.
Various land use regulations of Federal, State, and local governments may impose
special restrictions on land use or land treatment. Soil surveys identify soil
properties that are used in making various land use or land treatment decisions.
The information is intended to help the land users identify and reduce the effects of
soil limitations on various land uses. The landowner or user is responsible for
identifying and complying with existing laws and regulations.
Although soil survey information can be used for general farm, local, and wider area
planning, onsite investigation is needed to supplement this information in some
cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/
portal/nrcs/main/soils/health/) and certain conservation and engineering
applications. For more detailed information, contact your local USDA Service Center
(https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil
Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?
cid=nrcs142p2_053951).
Great differences in soil properties can occur within short distances. Some soils are
seasonally wet or subject to flooding. Some are too unstable to be used as a
foundation for buildings or roads. Clayey or wet soils are poorly suited to use as
septic tank absorption fields. A high water table makes a soil poorly suited to
basements or underground installations.
The National Cooperative Soil Survey is a joint effort of the United States
Department of Agriculture and other Federal agencies, State agencies including the
Agricultural Experiment Stations, and local agencies. The Natural Resources
Conservation Service (NRCS) has leadership for the Federal part of the National
Cooperative Soil Survey.
Information about soils is updated periodically. Updated information is available
through the NRCS Web Soil Survey, the site for official soil survey information.
The U.S. Department of Agriculture (USDA) prohibits discrimination in all its
programs and activities on the basis of race, color, national origin, age, disability,
and where applicable, sex, marital status, familial status, parental status, religion,
sexual orientation, genetic information, political beliefs, reprisal, or because all or a
part of an individual's income is derived from any public assistance program. (Not
all prohibited bases apply to all programs.) Persons with disabilities who require
2
alternative means for communication of program information (Braille, large print,
audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice
and TDD). To file a complaint of discrimination, write to USDA, Director, Office of
Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or
call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity
provider and employer.
3
Contents
Preface....................................................................................................................2
How Soil Surveys Are Made..................................................................................5
Soil Map..................................................................................................................8
Soil Map................................................................................................................9
Legend................................................................................................................10
Map Unit Legend................................................................................................12
Map Unit Descriptions........................................................................................12
Rifle Area, Colorado, Parts of Garfield and Mesa Counties............................14
3—Arvada loam, 1 to 6 percent slopes.......................................................14
40—Kim loam, 3 to 6 percent slopes..........................................................15
55—Potts loam, 3 to 6 percent slopes........................................................16
67—Torriorthents-Rock outcrop complex, steep.........................................17
Soil Information for All Uses...............................................................................19
Soil Reports........................................................................................................19
Water Features...............................................................................................19
Hydrologic Soil Group and Surface Runoff.................................................19
References............................................................................................................21
4
How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous
areas in a specific area. They include a description of the soils and miscellaneous
areas and their location on the landscape and tables that show soil properties and
limitations affecting various uses. Soil scientists observed the steepness, length,
and shape of the slopes; the general pattern of drainage; the kinds of crops and
native plants; and the kinds of bedrock. They observed and described many soil
profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The
profile extends from the surface down into the unconsolidated material in which the
soil formed or from the surface down to bedrock. The unconsolidated material is
devoid of roots and other living organisms and has not been changed by other
biological activity.
Currently, soils are mapped according to the boundaries of major land resource
areas (MLRAs). MLRAs are geographically associated land resource units that
share common characteristics related to physiography, geology, climate, water
resources, soils, biological resources, and land uses (USDA, 2006). Soil survey
areas typically consist of parts of one or more MLRA.
The soils and miscellaneous areas in a survey area occur in an orderly pattern that
is related to the geology, landforms, relief, climate, and natural vegetation of the
area. Each kind of soil and miscellaneous area is associated with a particular kind
of landform or with a segment of the landform. By observing the soils and
miscellaneous areas in the survey area and relating their position to specific
segments of the landform, a soil scientist develops a concept, or model, of how they
were formed. Thus, during mapping, this model enables the soil scientist to predict
with a considerable degree of accuracy the kind of soil or miscellaneous area at a
specific location on the landscape.
Commonly, individual soils on the landscape merge into one another as their
characteristics gradually change. To construct an accurate soil map, however, soil
scientists must determine the boundaries between the soils. They can observe only
a limited number of soil profiles. Nevertheless, these observations, supplemented
by an understanding of the soil-vegetation-landscape relationship, are sufficient to
verify predictions of the kinds of soil in an area and to determine the boundaries.
Soil scientists recorded the characteristics of the soil profiles that they studied. They
noted soil color, texture, size and shape of soil aggregates, kind and amount of rock
fragments, distribution of plant roots, reaction, and other features that enable them
to identify soils. After describing the soils in the survey area and determining their
properties, the soil scientists assigned the soils to taxonomic classes (units).
Taxonomic classes are concepts. Each taxonomic class has a set of soil
characteristics with precisely defined limits. The classes are used as a basis for
comparison to classify soils systematically. Soil taxonomy, the system of taxonomic
classification used in the United States, is based mainly on the kind and character
of soil properties and the arrangement of horizons within the profile. After the soil
5
scientists classified and named the soils in the survey area, they compared the
individual soils with similar soils in the same taxonomic class in other areas so that
they could confirm data and assemble additional data based on experience and
research.
The objective of soil mapping is not to delineate pure map unit components; the
objective is to separate the landscape into landforms or landform segments that
have similar use and management requirements. Each map unit is defined by a
unique combination of soil components and/or miscellaneous areas in predictable
proportions. Some components may be highly contrasting to the other components
of the map unit. The presence of minor components in a map unit in no way
diminishes the usefulness or accuracy of the data. The delineation of such
landforms and landform segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, onsite
investigation is needed to define and locate the soils and miscellaneous areas.
Soil scientists make many field observations in the process of producing a soil map.
The frequency of observation is dependent upon several factors, including scale of
mapping, intensity of mapping, design of map units, complexity of the landscape,
and experience of the soil scientist. Observations are made to test and refine the
soil-landscape model and predictions and to verify the classification of the soils at
specific locations. Once the soil-landscape model is refined, a significantly smaller
number of measurements of individual soil properties are made and recorded.
These measurements may include field measurements, such as those for color,
depth to bedrock, and texture, and laboratory measurements, such as those for
content of sand, silt, clay, salt, and other components. Properties of each soil
typically vary from one point to another across the landscape.
Observations for map unit components are aggregated to develop ranges of
characteristics for the components. The aggregated values are presented. Direct
measurements do not exist for every property presented for every map unit
component. Values for some properties are estimated from combinations of other
properties.
While a soil survey is in progress, samples of some of the soils in the area generally
are collected for laboratory analyses and for engineering tests. Soil scientists
interpret the data from these analyses and tests as well as the field-observed
characteristics and the soil properties to determine the expected behavior of the
soils under different uses. Interpretations for all of the soils are field tested through
observation of the soils in different uses and under different levels of management.
Some interpretations are modified to fit local conditions, and some new
interpretations are developed to meet local needs. Data are assembled from other
sources, such as research information, production records, and field experience of
specialists. For example, data on crop yields under defined levels of management
are assembled from farm records and from field or plot experiments on the same
kinds of soil.
Predictions about soil behavior are based not only on soil properties but also on
such variables as climate and biological activity. Soil conditions are predictable over
long periods of time, but they are not predictable from year to year. For example,
soil scientists can predict with a fairly high degree of accuracy that a given soil will
have a high water table within certain depths in most years, but they cannot predict
that a high water table will always be at a specific level in the soil on a specific date.
After soil scientists located and identified the significant natural bodies of soil in the
survey area, they drew the boundaries of these bodies on aerial photographs and
Custom Soil Resource Report
6
identified each as a specific map unit. Aerial photographs show trees, buildings,
fields, roads, and rivers, all of which help in locating boundaries accurately.
Custom Soil Resource Report
7
Soil Map
The soil map section includes the soil map for the defined area of interest, a list of
soil map units on the map and extent of each map unit, and cartographic symbols
displayed on the map. Also presented are various metadata about data used to
produce the map, and a description of each soil map unit.
8
9
Custom Soil Resource Report
Soil Map
4379100437920043793004379400437950043796004379000437910043792004379300437940043795004379600256600 256700 256800 256900 257000 257100 257200 257300 257400 257500
256500 256600 256700 256800 256900 257000 257100 257200 257300 257400
39° 31' 56'' N 107° 49' 59'' W39° 31' 56'' N107° 49' 17'' W39° 31' 35'' N
107° 49' 59'' W39° 31' 35'' N
107° 49' 17'' WN
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 200 400 800 1200
Feet
0 50 100 200 300
Meters
Map Scale: 1:4,570 if printed on A landscape (11" x 8.5") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Rifle Area, Colorado, Parts of Garfield and
Mesa Counties
Survey Area Data: Version 14, Sep 2, 2021
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Aug 25, 2021—Sep
5, 2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
Custom Soil Resource Report
10
MAP LEGEND MAP INFORMATION
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Custom Soil Resource Report
11
Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI
3 Arvada loam, 1 to 6 percent
slopes
63.8 75.3%
40 Kim loam, 3 to 6 percent slopes 12.6 14.8%
55 Potts loam, 3 to 6 percent
slopes
0.0 0.0%
67 Torriorthents-Rock outcrop
complex, steep
8.3 9.8%
Totals for Area of Interest 84.7 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the
soils or miscellaneous areas in the survey area. The map unit descriptions, along
with the maps, can be used to determine the composition and properties of a unit.
A map unit delineation on a soil map represents an area dominated by one or more
major kinds of soil or miscellaneous areas. A map unit is identified and named
according to the taxonomic classification of the dominant soils. Within a taxonomic
class there are precisely defined limits for the properties of the soils. On the
landscape, however, the soils are natural phenomena, and they have the
characteristic variability of all natural phenomena. Thus, the range of some
observed properties may extend beyond the limits defined for a taxonomic class.
Areas of soils of a single taxonomic class rarely, if ever, can be mapped without
including areas of other taxonomic classes. Consequently, every map unit is made
up of the soils or miscellaneous areas for which it is named and some minor
components that belong to taxonomic classes other than those of the major soils.
Most minor soils have properties similar to those of the dominant soil or soils in the
map unit, and thus they do not affect use and management. These are called
noncontrasting, or similar, components. They may or may not be mentioned in a
particular map unit description. Other minor components, however, have properties
and behavioral characteristics divergent enough to affect use or to require different
management. These are called contrasting, or dissimilar, components. They
generally are in small areas and could not be mapped separately because of the
scale used. Some small areas of strongly contrasting soils or miscellaneous areas
are identified by a special symbol on the maps. If included in the database for a
given area, the contrasting minor components are identified in the map unit
descriptions along with some characteristics of each. A few areas of minor
components may not have been observed, and consequently they are not
mentioned in the descriptions, especially where the pattern was so complex that it
was impractical to make enough observations to identify all the soils and
miscellaneous areas on the landscape.
The presence of minor components in a map unit in no way diminishes the
usefulness or accuracy of the data. The objective of mapping is not to delineate
Custom Soil Resource Report
12
pure taxonomic classes but rather to separate the landscape into landforms or
landform segments that have similar use and management requirements. The
delineation of such segments on the map provides sufficient information for the
development of resource plans. If intensive use of small areas is planned, however,
onsite investigation is needed to define and locate the soils and miscellaneous
areas.
An identifying symbol precedes the map unit name in the map unit descriptions.
Each description includes general facts about the unit and gives important soil
properties and qualities.
Soils that have profiles that are almost alike make up a soil series. Except for
differences in texture of the surface layer, all the soils of a series have major
horizons that are similar in composition, thickness, and arrangement.
Soils of one series can differ in texture of the surface layer, slope, stoniness,
salinity, degree of erosion, and other characteristics that affect their use. On the
basis of such differences, a soil series is divided into soil phases. Most of the areas
shown on the detailed soil maps are phases of soil series. The name of a soil phase
commonly indicates a feature that affects use or management. For example, Alpha
silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.
Some map units are made up of two or more major soils or miscellaneous areas.
These map units are complexes, associations, or undifferentiated groups.
A complex consists of two or more soils or miscellaneous areas in such an intricate
pattern or in such small areas that they cannot be shown separately on the maps.
The pattern and proportion of the soils or miscellaneous areas are somewhat similar
in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.
An association is made up of two or more geographically associated soils or
miscellaneous areas that are shown as one unit on the maps. Because of present
or anticipated uses of the map units in the survey area, it was not considered
practical or necessary to map the soils or miscellaneous areas separately. The
pattern and relative proportion of the soils or miscellaneous areas are somewhat
similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.
An undifferentiated group is made up of two or more soils or miscellaneous areas
that could be mapped individually but are mapped as one unit because similar
interpretations can be made for use and management. The pattern and proportion
of the soils or miscellaneous areas in a mapped area are not uniform. An area can
be made up of only one of the major soils or miscellaneous areas, or it can be made
up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.
Some surveys include miscellaneous areas. Such areas have little or no soil
material and support little or no vegetation. Rock outcrop is an example.
Custom Soil Resource Report
13
Rifle Area, Colorado, Parts of Garfield and Mesa Counties
3—Arvada loam, 1 to 6 percent slopes
Map Unit Setting
National map unit symbol: jnxv
Elevation: 5,100 to 6,200 feet
Farmland classification: Not prime farmland
Map Unit Composition
Arvada and similar soils:80 percent
Minor components:5 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Arvada
Setting
Landform:Fans, terraces
Landform position (three-dimensional):Tread
Down-slope shape:Linear, convex
Across-slope shape:Linear, convex
Parent material:Highly saline alluvium derived from sandstone and shale
Typical profile
H1 - 0 to 3 inches: loam
H2 - 3 to 17 inches: silty clay loam
H3 - 17 to 60 inches: silty clay loam
Properties and qualities
Slope:1 to 6 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat):Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:10 percent
Gypsum, maximum content:2 percent
Maximum salinity:Slightly saline to strongly saline (4.0 to 16.0 mmhos/cm)
Sodium adsorption ratio, maximum:30.0
Available water supply, 0 to 60 inches: Moderate (about 8.0 inches)
Interpretive groups
Land capability classification (irrigated): 7s
Land capability classification (nonirrigated): 7s
Hydrologic Soil Group: C
Ecological site: R034BY006UT - Alkali Flat (Greasewood)
Hydric soil rating: No
Minor Components
Wann
Percent of map unit:5 percent
Landform:Terraces
Custom Soil Resource Report
14
Landform position (three-dimensional):Tread
Hydric soil rating: Yes
40—Kim loam, 3 to 6 percent slopes
Map Unit Setting
National map unit symbol: jny7
Elevation: 5,000 to 6,000 feet
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Kim and similar soils:85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Kim
Setting
Landform:Alluvial fans, benches
Down-slope shape:Linear, convex
Across-slope shape:Linear, convex
Parent material:Alluvium derived from sandstone and shale
Typical profile
H1 - 0 to 17 inches: loam
H2 - 17 to 60 inches: loam
Properties and qualities
Slope:3 to 6 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: Low
Capacity of the most limiting layer to transmit water (Ksat):Moderately high to high
(0.60 to 6.00 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:15 percent
Available water supply, 0 to 60 inches: High (about 9.6 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3c
Hydrologic Soil Group: A
Ecological site: R048AY306UT - Upland Loam (Wyoming Big Sagebrush)
Hydric soil rating: No
Custom Soil Resource Report
15
55—Potts loam, 3 to 6 percent slopes
Map Unit Setting
National map unit symbol: jnyr
Elevation: 5,000 to 7,000 feet
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Potts and similar soils:85 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Potts
Setting
Landform:Mesas, benches, valley sides
Down-slope shape:Convex, linear
Across-slope shape:Convex, linear
Parent material:Alluvium derived from basalt and/or alluvium derived from
sandstone and shale
Typical profile
H1 - 0 to 4 inches: loam
H2 - 4 to 28 inches: clay loam
H3 - 28 to 60 inches: loam
Properties and qualities
Slope:3 to 6 percent
Depth to restrictive feature:More than 80 inches
Drainage class:Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat):Moderately high (0.20
to 0.60 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:15 percent
Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: High (about 10.3 inches)
Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3c
Hydrologic Soil Group: C
Ecological site: R048AY306UT - Upland Loam (Wyoming Big Sagebrush)
Hydric soil rating: No
Custom Soil Resource Report
16
67—Torriorthents-Rock outcrop complex, steep
Map Unit Setting
National map unit symbol: jnz5
Elevation: 5,800 to 8,500 feet
Mean annual precipitation: 10 to 15 inches
Mean annual air temperature: 39 to 46 degrees F
Frost-free period: 80 to 105 days
Farmland classification: Not prime farmland
Map Unit Composition
Torriorthents, steep, and similar soils:60 percent
Rock outcrop, steep:25 percent
Estimates are based on observations, descriptions, and transects of the mapunit.
Description of Torriorthents, Steep
Setting
Landform:Mountainsides
Landform position (two-dimensional):Footslope
Landform position (three-dimensional):Mountainflank, base slope
Down-slope shape:Concave, convex
Across-slope shape:Concave, convex
Parent material:Stony, basaltic alluvium derived from sandstone and shale
Typical profile
H1 - 0 to 4 inches: variable
H2 - 4 to 30 inches: fine sandy loam
H3 - 30 to 34 inches: unweathered bedrock
Properties and qualities
Slope:15 to 70 percent
Depth to restrictive feature:4 to 30 inches to lithic bedrock
Drainage class:Well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat):Moderately low to
moderately high (0.06 to 0.20 in/hr)
Depth to water table:More than 80 inches
Frequency of flooding:None
Frequency of ponding:None
Calcium carbonate, maximum content:5 percent
Maximum salinity:Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm)
Available water supply, 0 to 60 inches: Very low (about 2.4 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 7e
Hydrologic Soil Group: D
Hydric soil rating: No
Custom Soil Resource Report
17
Description of Rock Outcrop, Steep
Setting
Landform:Mountainsides
Landform position (three-dimensional):Free face
Down-slope shape:Convex
Across-slope shape:Convex
Typical profile
H1 - 0 to 60 inches: unweathered bedrock
Properties and qualities
Slope:15 to 70 percent
Depth to restrictive feature:0 inches to paralithic bedrock
Runoff class: Very high
Capacity of the most limiting layer to transmit water (Ksat):Very low to moderately
high (0.00 to 0.20 in/hr)
Available water supply, 0 to 60 inches: Very low (about 0.0 inches)
Interpretive groups
Land capability classification (irrigated): None specified
Land capability classification (nonirrigated): 8s
Hydric soil rating: No
Custom Soil Resource Report
18
Soil Information for All Uses
Soil Reports
The Soil Reports section includes various formatted tabular and narrative reports
(tables) containing data for each selected soil map unit and each component of
each unit. No aggregation of data has occurred as is done in reports in the Soil
Properties and Qualities and Suitabilities and Limitations sections.
The reports contain soil interpretive information as well as basic soil properties and
qualities. A description of each report (table) is included.
Water Features
This folder contains tabular reports that present soil hydrology information. The
reports (tables) include all selected map units and components for each map unit.
Water Features include ponding frequency, flooding frequency, and depth to water
table.
Hydrologic Soil Group and Surface Runoff
This table gives estimates of various soil water features. The estimates are used in
land use planning that involves engineering considerations.
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive precipitation
from long-duration storms.
The four hydrologic soil groups are:
Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly
wet. These consist mainly of deep, well drained to excessively drained sands or
gravelly sands. These soils have a high rate of water transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well drained
soils that have moderately fine texture to moderately coarse texture. These soils
have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
19
soils of moderately fine texture or fine texture. These soils have a slow rate of water
transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay layer at
or near the surface, and soils that are shallow over nearly impervious material.
These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas.
Surface runoff refers to the loss of water from an area by flow over the land surface.
Surface runoff classes are based on slope, climate, and vegetative cover. The
concept indicates relative runoff for very specific conditions. It is assumed that the
surface of the soil is bare and that the retention of surface water resulting from
irregularities in the ground surface is minimal. The classes are negligible, very low,
low, medium, high, and very high.
Report—Hydrologic Soil Group and Surface Runoff
Absence of an entry indicates that the data were not estimated. The dash indicates
no documented presence.
Hydrologic Soil Group and Surface Runoff–Rifle Area, Colorado, Parts of Garfield and Mesa Counties
Map symbol and soil name Pct. of map unit Surface Runoff Hydrologic Soil Group
3—Arvada loam, 1 to 6 percent slopes
Arvada 80 High C
Wann 5 ——
40—Kim loam, 3 to 6 percent slopes
Kim 85 Low A
55—Potts loam, 3 to 6 percent slopes
Potts 85 High C
67—Torriorthents-Rock outcrop complex, steep
Torriorthents, steep 60 High D
Rock outcrop, steep 25 Very high —
Custom Soil Resource Report
20
References
American Association of State Highway and Transportation Officials (AASHTO).
2004. Standard specifications for transportation materials and methods of sampling
and testing. 24th edition.
American Society for Testing and Materials (ASTM). 2005. Standard classification of
soils for engineering purposes. ASTM Standard D2487-00.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of
wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife
Service FWS/OBS-79/31.
Federal Register. July 13, 1994. Changes in hydric soils of the United States.
Federal Register. September 18, 2002. Hydric soils of the United States.
Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric
soils in the United States.
National Research Council. 1995. Wetlands: Characteristics and boundaries.
Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.
U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for
making and interpreting soil surveys. 2nd edition. Natural Resources Conservation
Service, U.S. Department of Agriculture Handbook 436. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577
Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of
Agriculture, Natural Resources Conservation Service. http://
www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580
Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and
Delaware Department of Natural Resources and Environmental Control, Wetlands
Section.
United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of
Engineers wetlands delineation manual. Waterways Experiment Station Technical
Report Y-87-1.
United States Department of Agriculture, Natural Resources Conservation Service.
National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/
home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.
National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/
detail/national/landuse/rangepasture/?cid=stelprdb1043084
21
United States Department of Agriculture, Natural Resources Conservation Service.
National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/
nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service.
2006. Land resource regions and major land resource areas of the United States,
the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook
296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?
cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land
capability classification. U.S. Department of Agriculture Handbook 210. http://
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf
Custom Soil Resource Report
22
Wright Water Engineers Date:6/23/2022
2490 West 26th Ave., Suite 100-A Project No.:191-034.7900
Denver, Colorado 80211 Project Name:Rifle Compressor Station
Tel. (303) 480-1700 Sheet: 1
Topic:Drainage Analysis for Rifle Compressor Station Project Calculations by:VH
Location:Garfield County Checked by:IP
No. Description Date Author Type
1 Peak Runoff Prediction by the Rational Method - UD Rational 2.00 Excel May-17 MHFD
Software
2 Urban Storm Drainage Criteria Manual Vol 1 2018 MHFD Methods/Hydrology Criteria
3 Garfield County Land Use and Development Code 2013 Garfield County Methods/Development Criteria
4 Mesa County Stormwater Management Manual - Section 604 in Rainfall 2007 Mesa County Data
5 NRCS Soil Resource Report Retrieved 5/17/22 NRCS Data
6 NOAA Atlas 14 Volume 8 Version 2 Point Precip Freq Estimates Retrieved 5/17/22 NOAA Data
Name Description Sheet # Type Reviewed?
Background Describes purpose, references, and summary of worksheets 1 Overview Y
Impervious Areas Impervious areas listed out and an area weighted %imp is calculated 2 Data Y
Existing_UD-Rational Calcs Existing conditions rational method calculations 3 Calculation Y
Post Dev_UD-Rational Post development no pavement rational method calculations 4 Calculation Y
Summary Results Summary of estimated peak runoff 5 Final results Y
Evaluate drainage of the existing site and proposed compressor station upgrades at the Rifle Compressor Station Project in Garfield County.
II. REFERENCES
I. PURPOSE
III. SUMMARY OF WORKSHEETS
Z:\Project Files\09\091-034\091-034.7900\Engineering\Hydrology\Calc Sheet 1_Drainage Analysis Calculations_Excel-Rifle Compressor Station_v3.xlsx
Wright Water Engineers Date:6/23/2022
2490 West 26th Ave., Suite 100-A Project No.:091-034.7900
Denver, Colorado 80211 Project Name:Rifle Compressor
Tel. (303) 480-1700 Sheet: 2
Drainage Analysis for Rifle Compressor Station Project Calculations by:VH
Garfield County Checked by:IP
input
calculation
result
Area Description Area (ft^2)
Area
(Acres)
Percent
Impervious
Building 947 0.02 90%
Concrete Pad 0 0.00 100%
Berm 0 0.00 40%
Small Building footprints 414 0.01 90%
Gravel 52144 1.20 40%
41.3%
Area Description Area (ft^2)
Area
(Acres)
Percent
Impervious
Building + Expansion 2403 0.06 90%
Concrete Pad 474 0.01 100%
Berm 834 0.02 40%
Small Building footprints 868 0.02 90%
Gravel 48926 1.12 40%
43.6%Area Weighted Percent Impervious =
II. Area weighted percent impervious calculations
Legend for
Cells:
Existing Conditions
Post Development Conditions
Area Weighted Percent Impervious =
Wright Water EngineersDate:
Tel. (303) 480-1700Sheet:
Designer:
Company: 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr
Date: 1-hour rainfall depth, P1 (in) =0.42 0.56 0.67 0.84 0.98 1.12 1.48
Project: a b c
Location: Rainfall Intensity Equation Coefficients =28.90 10.00 0.786
2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr
Overland
Flow Length
Li (ft)
U/S
Elevation
(ft)
(Optional)
D/S
Elevation
(ft)
(Optional)
Overland
Flow Slope
Si (ft/ft)
Overland
Flow Time
ti (min)
Channelized
Flow Length
Lt (ft)
U/S
Elevation
(ft)
(Optional)
D/S
Elevation
(ft)
(Optional)
Channelized
Flow Slope
St (ft/ft)
NRCS
Conveyance
Factor K
Channelized
Flow
Velocity
Vt (ft/sec)
Channelized
Flow Time
tt (min)
Computed
tc (min)
Regional
tc (min)
Selected
tc (min)2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr
0.31 0.37 0.44 0.55 0.60 0.65 0.72 12.19 12.19 12.19 1.07 1.41 1.70 2.13 2.48 2.83 3.74 0.39 0.62 0.87 1.38 1.74 2.18 3.17
Existing Conditions - Calculation of Peak Runoff using Rational Method
IP
VH
3
Rifle Compressor
091-034.7900
6/23/2022
Project No.:
Project Name:
Calculations by:
Checked by:
20 0.06 0.00 18.985309.00 0.044 0.00 0.000Existing Rifle 1.18 C 41.3 227.90 5319.00
Overland (Initial) Flow Time Channelized (Travel) Flow Time Time of Concentration Rainfall Intensity, I (in/hr)Peak Flow, Q (cfs)
Rifle Compressor Station Cells of this color are for optional override values
Garfield County, CO Cells of this color are for calculated results based on overrides
Subcatchment
Name
Area
(ac)
NRCS
Hydrologic
Soil Group
Percent
Imperviousnes
s
Runoff Coefficient, C
V Hennon Version 2.00 released May 2017 Select UDFCD location for NOAA Atlas 14 Rainfall Depths from the pulldown list OR enter your own depths obtained from the NOAA website (click this link)
WWE
6/23/2022 Cells of this color are for required user-input
I 𝑖𝑛/ℎ𝑟=a ∗Pଵ
b + tୡ ୡ
t୧ =0.395 1.1 −Cହ L୧
S୧
.ଷଷ
t୲ =L୲
60K S୲
= L୲
60V୲
Computed tୡ = t୧ + t୲
Regional tୡ =26 − 17i +
L୲
60 14i +9 S୲
Selected tୡ = max t୫୧୬୧୫୳୫ ,min Computed tୡ ,Regional tୡ
t୫୧୬୧୫୳୫=5 (urban)
t୫୧୬୧୫୳୫=10 (non-urban)
Q 𝑐𝑓𝑠= CIA
Wright Water EngineersDate:
Tel. (303) 480-1700Sheet:
Designer:
Company: 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr
Date: 1-hour rainfall depth, P1 (in) =0.42 0.56 0.67 0.84 0.98 1.12 1.48
Project: a b c
Location: Rainfall Intensity Equation Coefficients =28.90 10.00 0.786
2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr
Overland
Flow Length
Li (ft)
U/S
Elevation
(ft)
(Optional)
D/S
Elevation
(ft)
(Optional)
Overland
Flow Slope
Si (ft/ft)
Overland
Flow Time
ti (min)
Channelized
Flow Length
Lt (ft)
U/S
Elevation
(ft)
(Optional)
D/S
Elevation
(ft)
(Optional)
Channelized
Flow Slope
St (ft/ft)
NRCS
Conveyance
Factor K
Channelized
Flow
Velocity
Vt (ft/sec)
Channelized
Flow Time
tt (min)
Computed
tc (min)
Regional
tc (min)
Selected
tc (min)2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr 2-yr 5-yr 10-yr 25-yr 50-yr 100-yr 500-yr
0.33 0.39 0.45 0.56 0.61 0.66 0.73 11.92 11.92 11.92 1.08 1.42 1.72 2.15 2.50 2.86 3.78 0.42 0.65 0.92 1.43 1.79 2.23 3.230.000Post Developed
Rifle 1.18 C 43.6 229.00
Post Developed Conditions - Calculation of Peak Runoff using Rational Method
V Hennon Version 2.00 released May 2017 Select UDFCD location for NOAA Atlas 14 Rainfall Depths from the pulldown list OR enter your own depths obtained from the NOAA website (click this link)
WWE
6/23/2022 Cells of this color are for required user-input
6/23/2022
Project No.:091-034.7900
Project Name:Rifle Compressor
4
Calculations by:VH
Checked by:IP
5319.00
Overland (Initial) Flow Time Channelized (Travel) Flow Time Time of Concentration Rainfall Intensity, I (in/hr)Peak Flow, Q (cfs)
Rifle Compressor Station Cells of this color are for optional override values
Garfield County, CO Cells of this color are for calculated results based on overrides
Subcatchment
Name
Area
(ac)
NRCS
Hydrologic
Soil Group
Percent
Imperviousnes
s
Runoff Coefficient, C
20 0.06 0.00 18.595309.00 0.044 0.00
I 𝑖𝑛/ℎ𝑟=a ∗Pଵ
b + tୡ ୡ
t୧ =0.395 1.1 −Cହ L୧
S୧
.ଷଷ
t୲ =L୲
60K S୲
= L୲
60V୲
Computed tୡ = t୧ + t୲
Regional tୡ =26 − 17i +
L୲
60 14i +9 S୲
Selected tୡ = max t୫୧୬୧୫୳୫ ,min Computed tୡ ,Regional tୡ
t୫୧୬୧୫୳୫=5 (urban)
t୫୧୬୧୫୳୫=10 (non-urban)
Q 𝑐𝑓𝑠= CIA
Wright Water Engineers Date:6/23/2022
2490 West 26th Ave., Suite 100-A Project No.:091-034.7900
Denver, Colorado 80211 Project Name:Rifle Compressor
Tel. (303) 480-1700 Sheet: 5
Drainage Analysis for Rifle Compressor Station Project Calculations by:VH
Garfield County Checked by:IP
input
calculation
result
Scenario 2-yr 5-yr 10-yr 25-yr 100-yr
Existing Conditions 0.39 0.62 0.87 1.38 2.18
Post Development Conditions 0.42 0.65 0.92 1.43 2.23
Legend for Cells:
V. Summary of estimated peak flow
Estimated Peak Flow Results (cfs)
Z:\Project Files\09\091-034\091-034.7900\Engineering\Hydrology\Calc Sheet 1_Drainage Analysis Calculations_Excel-Rifle Compressor Station_v3.xlsx
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/1/10
Rifle Compressor Project
Basin Characteristics
P a r a m e t e r
C o d e P a r a m e t e r D e s c r i p t i o n V a l u e U n i t
B S L D E M 1 0 M M e a n b a s i n s l o p e c o m p u t e d f r o m 1 0 m D E M 2 2 p e r c e n t
C S L 1 0 8 5 L F P C h a n g e i n e l e v a t i o n d i v i d e d b y l e n g t h b e t w e e n p o i n t s 1 0
a n d 8 5 p e r c e n t o f d i s t a n c e a l o n g t h e l o n g e s t f l o w p a t h
t o t h e b a s i n d i v i d e , L F P f r o m 2 D g r i d
6 6 8 f e e t p e r
D R N A R E A A r e a t h a t d r a i n s t o a p o i n t o n a s t r e a m 0 .0 4 8 8 s q u a r e
E L 7 5 0 0 P e r c e n t o f a r e a a b o v e 7 5 0 0 f t 0 p e r c e n t
E L E V M e a n B a s i n E l e v a t i o n 5 5 0 8 f e e t
E L E V M A X M a x i m u m b a s i n e l e v a t i o n 5 7 1 0 f e e t
R e g i o n I D :C O
W o r k s p a c e I D :C O 2 0 2 2 0 5 1 7 1 5 4 9 5 0 7 2 3 0 0 0
C l i c k e d P o i n t (L a t i t u d e , L o n g i t u d e ):3 9 .5 2 9 6 0 , -1 0 7 .8 2 7 0 8
T i m e :2 0 2 2 -0 5 -1 7 0 9 :5 0 :1 1 -0 6 0 0
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/2/10
P a r a m e t e r
C o d e P a r a m e t e r D e s c r i p t i o n V a l u e U n i t
I 2 4 H 1 0 0 Y M a x i m u m 2 4 -h o u r p r e c i p i t a t i o n t h a t o c c u r s o n a v e r a g e
o n c e i n 1 0 0 y e a r s
2 .3 1 i n c h e s
I 2 4 H 2 Y M a x i m u m 2 4 -h o u r p r e c i p i t a t i o n t h a t o c c u r s o n a v e r a g e
o n c e i n 2 y e a r s - E q u i v a l e n t t o p r e c i p i t a t i o n i n t e n s i t y
i n d e x
1 .0 7 i n c h e s
I 6 H 1 0 0 Y 6 -h o u r p r e c i p i t a t i o n t h a t i s e x p e c t e d t o o c c u r o n
a v e r a g e o n c e i n 1 0 0 y e a r s
1 i n c h e s
I 6 H 2 Y M a x i m u m 6 -h o u r p r e c i p i t a t i o n t h a t o c c u r s o n a v e r a g e
o n c e i n 2 y e a r s
0 .6 9 i n c h e s
L AT _O U T L a t i t u d e o f B a s i n O u t l e t 3 9 .5 2 9 5 8 5 d e g r e e s
L C 1 1 B A R E P e r c e n t a g e o f b a r r e n f r o m N L C D 2 0 1 1 c l a s s 3 1 0 p e r c e n t
L C 1 1 C R P H AY P e r c e n t a g e o f c u l t i v a t e d c r o p s a n d h a y, c l a s s e s 8 1 a n d
8 2 , f r o m N L C D 2 0 1 1
0 p e r c e n t
L C 1 1 D E V P e r c e n t a g e o f d e v e l o p e d (u r b a n ) l a n d f r o m N LC D 2 0 1 1
c l a s s e s 2 1 -2 4
0 p e r c e n t
L C 1 1 F O R E S T P e r c e n t a g e o f f o r e s t f r o m N L C D 2 0 1 1 c l a s s e s 4 1 -4 3 0 p e r c e n t
L C 1 1 G R A S S P e r c e n t o f a r e a c o v e r e d b y g r a s s l a n d /h e r b a c e o u s u s i n g
2 0 1 1 N L C D
0 p e r c e n t
L C 1 1 I M P A v e r a g e p e r c e n t a g e o f i m p e r v i o u s a r e a d e t e r m i n e d
f r o m N L C D 2 0 1 1 i m p e r v i o u s d a t a s e t
0 p e r c e n t
L C 1 1 S H R U B P e r c e n t o f a r e a c o v e r e d b y s h r u b l a n d u s i n g 2 0 1 1 N L C D 1 0 0 p e r c e n t
L C 1 1 S N O I C P e r c e n t s n o w a n d i c e f r o m N LC D 2 0 1 1 c l a s s 1 2 0 p e r c e n t
L C 1 1 W AT E R P e r c e n t o f o p e n w a t e r, c l a s s 1 1 , f r o m N L C D 2 0 1 1 0 p e r c e n t
L C 1 1 W E T L N D P e r c e n t a g e o f w e t l a n d s , c l a s s e s 9 0 a n d 9 5 , f r o m N L C D
2 0 1 1
0 p e r c e n t
L F P L E N G T H L e n g t h o f l o n g e s t f l o w p a t h 0 .6 8 m i l e s
L O N G _O U T L o n g i t u d e o f B a s i n O u t l e t -1 0 7 .8 2 7 0 7 5 d e g r e e s
M I N B E L E V M i n i m u m b a s i n e l e v a t i o n 5 3 2 0 f e e t
O U T L E T E L E V E l e v a t i o n o f t h e s t r e a m o u t l e t i n f e e t a b o v e N AV D 8 8 5 3 1 5 f e e t
P R E C I P M e a n A n n u a l P r e c i p i t a t i o n 1 2 .9 7 i n c h e s
R C N R u n o f f -c u r v e n u m b e r a s d e f i n e d b y N R C S
(h t t p ://p o l i c y.n r c s .u s d a .g o v /O p e n N o n W e b C o n t e n t .a s p x ?
c o n t e n t =1 7 7 5 8 .w b a )
8 2 .3 9 d i m e n s
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/3/10
P a r a m e t e r
C o d e P a r a m e t e r D e s c r i p t i o n V a l u e U n i t
R U N C O _C O S o i l r u n o f f c o e f f i c i e n t a s d e f i n e d b y V e r d i n a n d G r o s s
(2 0 1 7 )
0 .3 d i m e n s
S S U R G O A P e r c e n t a g e o f a r e a o f H y d r o l o g i c S o i l Ty p e A f r o m
S S U R G O
0 p e r c e n t
S S U R G O B P e r c e n t a g e o f a r e a o f H y d r o l o g i c S o i l Ty p e B f r o m
S S U R G O
0 p e r c e n t
S S U R G O C P e r c e n t a g e o f a r e a o f H y d r o l o g i c S o i l Ty p e C f r o m
S S U R G O
7 2 .1 p e r c e n t
S S U R G O D P e r c e n t a g e o f a r e a o f H y d r o l o g i c S o i l Ty p e D f r o m
S S U R G O
2 7 .9 p e r c e n t
S TAT S C L A Y P e r c e n t a g e o f c l a y s o i l s f r o m S T AT S G O 2 5 .5 1 p e r c e n t
S T O R N H D P e r c e n t s t o r a g e (w e t l a n d s a n d w a t e r b o d i e s ) d e t e r m i n e d
f r o m 1 :2 4 K N H D
0 p e r c e n t
T O C T i m e o f c o n c e n t r a t i o n i n h o u r s 0 .2 9 h o u r s
Peak-Flow Statistics Parameters [Northwest Region Peak Flow]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 1 5 2 5 0
E L 7 5 0 0 P e r c e n t a b o v e 7 5 0 0 f t 0 p e r c e n t 0 9 9
P R E C I P M e a n A n n u a l P r e c i p i t a t i o n 1 2 .9 7 i n c h e s 8 4 9
Peak-Flow Statistics Disclaimers [Northwest Region Peak Flow]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Peak-Flow Statistics Flow Report [Northwest Region Peak Flow]
S t a t i s t i c V a l u e U n i t
5 0 -p e r c e n t A E P f l o o d 1 .8 2 f t ^3 /s
2 0 -p e r c e n t A E P f l o o d 5 .4 8 f t ^3 /s
1 0 -p e r c e n t A E P f l o o d 1 1 .6 f t ^3 /s
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/4/10
S t a t i s t i c V a l u e U n i t
4 -p e r c e n t A E P f l o o d 2 4 .7 f t ^3 /s
2 -p e r c e n t A E P f l o o d 4 1 .3 f t ^3 /s
1 -p e r c e n t A E P f l o o d 6 2 .5 f t ^3 /s
0 .5 -p e r c e n t A E P f l o o d 9 5 .2 f t ^3 /s
0 .2 -p e r c e n t A E P f l o o d 1 5 4 f t ^3 /s
Peak-Flow Statistics Citations
C a p e s i u s , J .P., a n d S t e p h e n s , V. C .,2 0 0 9 , R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i o n o f
N a t u r a l S t r e a m f l o w S t a t i s t i c s i n C o l o r a d o : U . S . G e o l o g i c a l S u r v e y S c i e n t i f i c I n v e s t i g a t i o n s
R e p o r t 2 0 0 9 -5 1 3 6 , 3 2 p .
(h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /)
Flood-Volume Statistics Parameters [Northwest Region Max Flow]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 5 5 2 5 0
P R E C I P M e a n A n n u a l P r e c i p i t a t i o n 1 2 .9 7 i n c h e s 8 4 9
E L 7 5 0 0 P e r c e n t a b o v e 7 5 0 0 f t 0 p e r c e n t 0 9 9
Flood-Volume Statistics Disclaimers [Northwest Region Max Flow]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Flood-Volume Statistics Flow Report [Northwest Region Max Flow]
S t a t i s t i c V a l u e U n i t
7 D a y 2 Y e a r M a x i m u m 0 .0 0 0 0 2 9 2 f t ^3 /s
7 D a y 1 0 Y e a r M a x i m u m 0 .0 0 0 1 2 5 f t ^3 /s
7 D a y 5 0 Y e a r M a x i m u m 0 .0 0 0 7 4 2 f t ^3 /s
Flood-Volume Statistics Citations
C a p e s i u s , J .P., a n d S t e p h e n s , V. C .,2 0 0 9 , R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i o n o f
N a t u r a l S t r e a m f l o w S t a t i s t i c s i n C o l o r a d o : U . S . G e o l o g i c a l S u r v e y S c i e n t i f i c I n v e s t i g a t i o n s
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/5/10
R e p o r t 2 0 0 9 -5 1 3 6 , 3 2 p .
(h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /)
Low-Flow Statistics Parameters [Northwest Region Min Flow]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 5 5 2 5 0
E L E V M e a n B a s i n E l e v a t i o n 5 5 0 8 f e e t 6 8 8 0 1 0 4 8 0
Low-Flow Statistics Disclaimers [Northwest Region Min Flow]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Low-Flow Statistics Flow Report [Northwest Region Min Flow]
S t a t i s t i c V a l u e U n i t
7 D a y 2 Y e a r L o w F l o w 0 .0 0 0 1 6 f t ^3 /s
7 D a y 1 0 Y e a r L o w F l o w 0 .0 0 0 0 3 4 7 f t ^3 /s
7 D a y 5 0 Y e a r L o w F l o w 0 .0 0 0 0 2 5 f t ^3 /s
Low-Flow Statistics Citations
C a p e s i u s , J .P., a n d S t e p h e n s , V. C .,2 0 0 9 , R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i o n o f
N a t u r a l S t r e a m f l o w S t a t i s t i c s i n C o l o r a d o : U . S . G e o l o g i c a l S u r v e y S c i e n t i f i c I n v e s t i g a t i o n s
R e p o r t 2 0 0 9 -5 1 3 6 , 3 2 p .
(h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /)
Flow-Duration Statistics Parameters [Northwest Region Flow Duration]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 1 5 2 5 0
P R E C I P M e a n A n n u a l P r e c i p i t a t i o n 1 2 .9 7 i n c h e s 8 4 9
Flow-Duration Statistics Disclaimers [Northwest Region Flow Duration]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/6/10
Flow-Duration Statistics Flow Report [Northwest Region Flow Duration]
S t a t i s t i c V a l u e U n i t
1 0 P e r c e n t D u r a t i o n 0 .0 0 2 1 2 f t ^3 /s
2 5 P e r c e n t D u r a t i o n 0 .0 0 0 8 f t ^3 /s
5 0 P e r c e n t D u r a t i o n 0 .0 0 0 3 7 2 f t ^3 /s
7 5 P e r c e n t D u r a t i o n 0 .0 0 0 1 3 1 f t ^3 /s
9 0 P e r c e n t D u r a t i o n 0 .0 0 0 0 4 2 8 f t ^3 /s
Flow-Duration Statistics Citations
C a p e s i u s , J .P., a n d S t e p h e n s , V. C .,2 0 0 9 , R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i o n o f
N a t u r a l S t r e a m f l o w S t a t i s t i c s i n C o l o r a d o : U . S . G e o l o g i c a l S u r v e y S c i e n t i f i c I n v e s t i g a t i o n s
R e p o r t 2 0 0 9 -5 1 3 6 , 3 2 p .
(h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /)
Annual Flow Statistics Parameters [Northwest Region Mean Flow]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 1 5 2 5 0
P R E C I P M e a n A n n u a l P r e c i p i t a t i o n 1 2 .9 7 i n c h e s 8 4 9
Annual Flow Statistics Disclaimers [Northwest Region Mean Flow]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Annual Flow Statistics Flow Report [Northwest Region Mean Flow]
S t a t i s t i c V a l u e U n i t
M e a n A n n u a l F l o w 0 .0 0 2 9 4 f t ^3 /s
Annual Flow Statistics Citations
C a p e s i u s , J .P., a n d S t e p h e n s , V. C .,2 0 0 9 , R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i o n o f
N a t u r a l S t r e a m f l o w S t a t i s t i c s i n C o l o r a d o : U . S . G e o l o g i c a l S u r v e y S c i e n t i f i c I n v e s t i g a t i o n s
R e p o r t 2 0 0 9 -5 1 3 6 , 3 2 p .
(h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /)
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/7/10
Monthly Flow Statistics Parameters [Northwest Region Mean Flow]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 1 5 2 5 0
P R E C I P M e a n A n n u a l P r e c i p i t a t i o n 1 2 .9 7 i n c h e s 8 4 9
Monthly Flow Statistics Disclaimers [Northwest Region Mean Flow]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Monthly Flow Statistics Flow Report [Northwest Region Mean Flow]
S t a t i s t i c V a l u e U n i t
J a n u a r y M e a n F l o w 0 .0 0 0 6 4 4 f t ^3 /s
F e b r u a r y M e a n F l o w 0 .0 0 0 4 1 f t ^3 /s
M a r c h M e a n F l o w 0 .0 0 0 5 5 1 f t ^3 /s
A p r i l M e a n F l o w 0 .0 0 1 5 9 f t ^3 /s
M a y M e a n F l o w 0 .0 0 9 6 6 f t ^3 /s
J u n e M e a n F l o w 0 .0 0 1 6 2 f t ^3 /s
J u l y M e a n F l o w 0 .0 0 9 5 6 f t ^3 /s
A u g u s t M e a n F l o w 0 .0 1 1 8 f t ^3 /s
S e p t e m b e r M e a n F l o w 0 .0 0 7 9 1 f t ^3 /s
O c t o b e r M e a n F l o w 0 .0 0 1 5 2 f t ^3 /s
N o v e m b e r M e a n F l o w 0 .0 0 0 6 6 f t ^3 /s
D e c e m b e r M e a n F l o w 0 .0 0 0 6 3 7 f t ^3 /s
Monthly Flow Statistics Citations
C a p e s i u s , J .P., a n d S t e p h e n s , V. C .,2 0 0 9 , R e g i o n a l R e g r e s s i o n E q u a t i o n s f o r E s t i m a t i o n o f
N a t u r a l S t r e a m f l o w S t a t i s t i c s i n C o l o r a d o : U . S . G e o l o g i c a l S u r v e y S c i e n t i f i c I n v e s t i g a t i o n s
R e p o r t 2 0 0 9 -5 1 3 6 , 3 2 p .
(h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /h t t p ://p u b s .u s g s .g o v /s i r /2 0 0 9 /5 1 3 6 /)
Bankfull Statistics Parameters [Intermontane Plateau D Bieger 2015]
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/8/10
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i tParameter C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 3 .6 2 9 3 4 7 5 7 9 .9 1 5 2
Bankfull Statistics Parameters [Colorado Plateau P Bieger 2015]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 3 .6 2 1 6 1 8 3 6 4 9 .9 8 0 9 0 6
Bankfull Statistics Parameters [USA Bieger 2015]
P a r a m e t e r C o d e P a r a m e t e r N a m e V a l u e U n i t s M i n L i m i t M a x L i m i t
D R N A R E A D r a i n a g e A r e a 0 .0 4 8 8 s q u a r e m i l e s 0 .0 7 7 2 2 5 9 9 2 7 .7 3 9 3
Bankfull Statistics Disclaimers [Intermontane Plateau D Bieger 2015]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Bankfull Statistics Flow Report [Intermontane Plateau D Bieger 2015]
S t a t i s t i c V a l u e U n i t
B i e g e r _D _c h a n n e l _w i d t h 1 .5 4 f t
B i e g e r _D _c h a n n e l _d e p t h 0 .1 1 6 f t
B i e g e r _D _c h a n n e l _c r o s s _s e c t i o n a l _a r e a 0 .1 5 9 f t ^2
Bankfull Statistics Disclaimers [Colorado Plateau P Bieger 2015]
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Bankfull Statistics Flow Report [Colorado Plateau P Bieger 2015]
S t a t i s t i c V a l u e U n i t
B i e g e r _P _c h a n n e l _w i d t h 1 .6 2 f t
B i e g e r _P _c h a n n e l _d e p t h 0 .0 4 3 9 f t
B i e g e r _P _c h a n n e l _c r o s s _s e c t i o n a l _a r e a 0 .0 7 2 8 f t ^2
Bankfull Statistics Disclaimers [USA Bieger 2015]
5/17/22, 10:52 AM StreamStats
https://streamstats.usgs.gov/ss/9/10
O n e o r m o r e o f t h e p a ra m e t e r s i s o u t s i d e t h e s u g g e s t e d ra n g e . E s t i m a t e s w e r e e x t ra p o l a t e d w i t h
u n k n o w n e r r o r s .
Bankfull Statistics Flow Report [USA Bieger 2015]
S t a t i s t i c V a l u e U n i t
B i e g e r _U S A _c h a n n e l _w i d t h 4 .2 8 f t
B i e g e r _U S A _c h a n n e l _d e p t h 0 .6 3 4 f t
B i e g e r _U S A _c h a n n e l _c r o s s _s e c t i o n a l _a r e a 3 .3 5 f t ^2
Bankfull Statistics Flow Report [Area-Averaged]
S t a t i s t i c V a l u e U n i t
B i e g e r _D _c h a n n e l _w i d t h 1 .5 4 f t
B i e g e r _D _c h a n n e l _d e p t h 0 .1 1 6 f t
B i e g e r _D _c h a n n e l _c r o s s _s e c t i o n a l _a r e a 0 .1 5 9 f t ^2
B i e g e r _P _c h a n n e l _w i d t h 1 .6 2 f t
B i e g e r _P _c h a n n e l _d e p t h 0 .0 4 3 9 f t
B i e g e r _P _c h a n n e l _c r o s s _s e c t i o n a l _a r e a 0 .0 7 2 8 f t ^2
B i e g e r _U S A _c h a n n e l _w i d t h 4 .2 8 f t
B i e g e r _U S A _c h a n n e l _d e p t h 0 .6 3 4 f t
B i e g e r _U S A _c h a n n e l _c r o s s _s e c t i o n a l _a r e a 3 .3 5 f t ^2
Bankfull Statistics Citations
B i e g e r, K a t r i n ; R a t h j e n s , H e n d r i k ; A l l e n , P e t e r M .; a n d A r n o l d , J e f f r e y G .,2 0 1 5 ,
D e v e l o p m e n t a n d E v a l u a t i o n o f B a n k f u l l H y d r a u l i c G e o m e t r y R e l a t i o n s h i p s f o r t h e
P h y s i o g r a p h i c R e g i o n s o f t h e U n i t e d S t a t e s , P u b l i c a t i o n s f r o m U S D A -A R S / U N L F a c u l t y,
1 7 p . (h t t p s ://d i g i t a l c o m m o n s .u n l .e d u /u s d a a r s f a c p u b /1 5 1 5 ?
u t m _s o u r c e =d i g i t a l c o m m o n s .u n l .e d u %2 F u s d a a r s f a c p u b %2 F 1 5 1 5 &u t m _m e d i u m =P D F &u t m _c a m
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nor shall the act of distribution constitute any such warranty.
5/17/22, 10:52 AM StreamStats
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COUNTY RD 264CONC.RAMPLODLOCPROPOSEDMOUNTAINWESTPIPELINEFENCEEXISTING CULVERT TO BE REMOVEDEXISTING CULVERTTO BE REMOVEDVTCEXISTINGFENCEFENCE TO BEPERMITTEDSEPARATELY BYMOUNTAINWESTPIPELINEPROPOSEDCOMPRESSORBUILDING42'-6"x33'-6"PROPERTY LINEPROPERTY LINEFUTUREBLDG.EXPANSIONEXISTING FENCE TO REMAIN IN PLACEEXISTING CULVERTTO REMAIN IN PLACEEXISTINGCOMPRSSSOR BLDG.RS OP IP IP OPsupply before removing this cove
r
.
WARNING: Disconnect the main po
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e
rNO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/24/2022, 02:30:14 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP_DRAINAGE-REPORT.DWG-02_INITIAL_CM_MAP
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP_DRAINAGE-REPORT.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDIPLAJKJKRS1080EXISTING CONTOURSFLOW DIRECTIONPROPOSED ABOVE GROUND PIPINGPROPOSED FENCELIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLROCK SOCKINLET PROTECTIONOUTLET PROTECTIONEXISTING CULVERTLODLOCVTCNOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.OP6/22/226/22/226/22/22
10435316.70TSC10445316.67TSC10795313.81TSCBBBBB11265314.44TSCXXXXXGGGGGGGXXGATEGATEGATE8" GAS LINEEXPOSED IN WASHOUTCOMPRESSOR BUILDING8" RISERWESTERN SLOPEGAS CO.BK. 669, PG. 461WESTERN SLOPE GAS CO.BK.806, PG. 938FLOOR ELEV.:5314.44'FLOOR ELEV.:5314.77'BURNER PADCOOLER PADSEPARATORPADEMPTY PADEMPTY PADSTAIRCASEPADSTAIRCASEPADSTAIRCASEPADODORIZERRTUPADSWALLOW LANE(DIRT)EMPTY PADNW1/4,SEC. 18,T6S, R93WNE1/4,SEC. 13,T6S, R94W10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPEPROPOSED 100'X60'EASEMENT12" STEEL PIPEINV. 5312.2'12" STEEL PIPEINV. 5311.5'12" CMP PIPEINV. 5313.5'12" CMP PIPEINV. 5314.0'8" STEEL PIPEINV. 5310.4'8" STEEL PIPEINV. 5309.8'BBBE13035317.97UCT1 B13045318.19UCT113055318.74UCT118825314.41TSC18835315.05TSC18845314.98TSCGGGGGGGGGG G G G
GGGGG
FOG GGGG G
XOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHXXOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOH6" CMPINV. 5310.9'6" CMPINV. 5308.7'LOST SIGNALLOST SIGNALLOST SIGNALSINK HOLESSINK HOLESGRAVEL TURNAROUNDUTILITY PADGRAVEL BERM PITLOST SIGNALABOVE GROUNDPIPING (TYP.)ABOVE GROUNDPIPING (TYP.)FLOOR ELEV.:5314.41'FLOOR ELEV.:5315.05'FLOOR ELEV.:5314.98'CONTROL POINTCP6 SEH OPCGRAVEL BERMPITWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUT12" CMPINV. 5317.6'12" CMPINV. 5316.5'4' BARB WIRE FENCE4' BARB WIRE FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCECLOUGH SHEEPCO., LLC.CLOUGH SHEEPCO., LLC.SITE SIGNXXXXXXXXXXXXXXXXX X X X X
X
X
COUNTY RD 264CONC.RAMP2'(H):1'(V) SLOPE(12"-18" RIPRAP)LODLOCPROPOSEDMOUNTAINWESTPIPELINEFENCEEXISTING CULVERT TO BE REMOVEDEXISTING CULVERTTO BE REMOVEDVTCEXISTING PIPELINETIE-IN BELOW GRADEEXISTINGFENCEFENCE TO BEPERMITTEDSEPARATELY BYMOUNTAINWESTPIPELINEPROPOSEDCOMPRESSORBUILDING42'-6"x33'-6"PROPERTY LINEPROPERTY LINEFUTUREBLDG.EXPANSIONEXISTING FENCE TO REMAIN IN PLACEEXISTING CULVERTTO REMAIN IN PLACEPROPOSED 2022BURRIED PIPINGEXISTING 8"FROM RIFLE GASPLANTEXISTING 8" TORIFLE GAS PLANTCUTTING BACK EXISTINGRETIRED PIPING ANDCAPPING/ BLIND FLANGINGPROPOSEDINSTRUMENT AIRBUILDING 20' X 12'EXISTINGCOMPRSSSOR BLDG.PROPOSED GASANALYZERBUILDING 8' X 16'EXISTING CULVERT(UNDER EXISTINGDRIVEWAY)EXISTING ROADSIDESWALE(DRAINS TO THE WEST)RS OP IP CD IP OPPSCo IS NOT ANTICIPATING USINGTHIS DRIVEWAY FOR ACCESS. IF ITIS USED, A VTC WILL BE ADDED.supply before removing this cove
r
.
WARNING: Disconnect the main po
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r PROPOSEDCONTROLBUILDING 10' X 14'NO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/24/2022, 02:30:27 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP_DRAINAGE-REPORT.DWG-03_INITERIM_CM_MAP
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP_DRAINAGE-REPORT.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDLAJKJK1080EXISTING CONTOURSFLOW DIRECTIONPROPOSED ABOVE GROUND PIPINGPROPOSED UNDERGROUND PIPINGPROPOSED FENCELIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLRIPRAPROCK SOCKINLET PROTECTIONOUTLET PROTECTIONCHECK DAMEXISTING CULVERTLODLOCVTCRSIPOPCDNOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.6/22/226/22/226/22/22
10435316.70TSC10445316.67TSC10795313.81TSCBBBBB11265314.44TSCXXXXXGGGGGGGXXGATEGATEGATE8" GAS LINEEXPOSED IN WASHOUTCOMPRESSOR BUILDING8" RISERWESTERN SLOPEGAS CO.BK. 669, PG. 461WESTERN SLOPE GAS CO.BK.806, PG. 938FLOOR ELEV.:5314.44'FLOOR ELEV.:5314.77'BURNER PADCOOLER PADSEPARATORPADEMPTY PADEMPTY PADSTAIRCASEPADSTAIRCASEPADSTAIRCASEPADODORIZERRTUPADSWALLOW LANE(DIRT)EMPTY PADNW1/4,SEC. 18,T6S, R93WNE1/4,SEC. 13,T6S, R94W10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPEPROPOSED 100'X60'EASEMENT12" STEEL PIPEINV. 5312.2'12" STEEL PIPEINV. 5311.5'12" CMP PIPEINV. 5313.5'12" CMP PIPEINV. 5314.0'8" STEEL PIPEINV. 5310.4'8" STEEL PIPEINV. 5309.8'BBBE13035317.97UCT1 B13045318.19UCT113055318.74UCT118825314.41TSC18835315.05TSC18845314.98TSCGGGGGGGGGG G G G
GGGGG
FOG GGGG G
XOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHXXOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOH6" CMPINV. 5310.9'6" CMPINV. 5308.7'LOST SIGNALLOST SIGNALLOST SIGNALSINK HOLESSINK HOLESGRAVEL TURNAROUNDUTILITY PADGRAVEL BERM PITLOST SIGNALABOVE GROUNDPIPING (TYP.)ABOVE GROUNDPIPING (TYP.)FLOOR ELEV.:5314.41'FLOOR ELEV.:5315.05'FLOOR ELEV.:5314.98'CONTROL POINTCP6 SEH OPCGRAVEL BERMPITWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUT12" CMPINV. 5317.6'12" CMPINV. 5316.5'4' BARB WIRE FENCE4' BARB WIRE FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCECLOUGH SHEEPCO., LLC.CLOUGH SHEEPCO., LLC.SITE SIGNXXXXXXXXXXXXXXXXX X X X X
X
X
COUNTY RD 264CONC.RAMP2'(H):1'(V) SLOPE(12"-18" RIPRAP)PROPOSEDYARD GRAVELPROPOSEDCONCRETEEXISTING PIPELINETIE-IN BELOW GRADEEXISTINGFENCEFENCE TO BEPERMITTEDSEPARATELY BYMOUNTAINWESTPIPELINEPROPOSEDCOMPRESSORBUILDING42'-6"x33'-6"PROPERTY LINEPROPERTY LINEFUTUREBLDG.EXPANSIONEXISTING FENCE TO REMAIN IN PLACEEXISTING CULVERTTO REMAIN IN PLACEPROPOSED 2022BURRIED PIPINGEXISTING 8"FROM RIFLE GASPLANTEXISTING 8" TORIFLE GAS PLANTCUTTING BACK EXISTINGRETIRED PIPING ANDCAPPING/ BLIND FLANGINGPROPOSEDINSTRUMENT AIRBUILDING 20' X 12'EXISTINGCOMPRSSSOR BLDG.MATCH EXISTING GRADE ATLOD LINE (TYP.)PROPOSED GASANALYZERBUILDING 8' X 16'EXISTING CULVERT(UNDER EXISTINGDRIVEWAY)EXISTING ROADSIDESWALE(DRAINS TO THE WEST) CDPSCo IS NOT ANTICIPATING USINGTHIS DRIVEWAY FOR ACCESS. IF ITIS USED, A VTC WILL BE ADDED.supply before removing thi
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WARNING: Disconnect the m
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r PROPOSEDCONTROLBUILDING 10' X 14'NO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/24/2022, 02:30:37 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP_DRAINAGE-REPORT.DWG-04_FINAL_CM_MAP
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP_DRAINAGE-REPORT.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDLAJKJK1080EXISTING CONTOURSFLOW DIRECTIONPROPOSED ABOVE GROUND PIPINGPROPOSED UNDERGROUND PIPINGPROPOSED FENCELIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLRIPRAPROCK SOCKINLET PROTECTIONOUTLET PROTECTIONCHECK DAMEXISTING CULVERTPROPOSED YARD GRAVELPROPOSED CONCRETELODLOCVTCRSIPOPCDNOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.6/22/226/22/226/22/22
Appendix E –Photo Log
Rifle Compressor Station, Field Date: 05/19/2022
Photo 1. Facing east. Project area is south of the road. Swale
north and south of County Road 264.
Photo 2. Facing west. Swale north and south of County
Road 264. Culvert under the existing northwest driveway in
upper left of photo, which discharges to west drainage
channel.
Photo 3. Facing north. Property directly north of project area.
Run-on from this upstream area is collected in the roadside
swales and discharged into west and east drainage channels.
Photo 4. Facing south. Drainage channel east of project
area.
Photo 5. Facing south. Drainage channel west of project area.
Exposed pipeline shown (red in color, lower right of photo).
Photo 6. Facing west. Drainage channel west of project
area, erosion evident.
Photo 7. Facing north. Drainage channel west of project area,
erosion evident.
Photo 8. Facing northwest. Existing culvert located
southwest of site to remain.
Photo 9. Facing southwest. Existing gravel drainage on south
end of project site
Photo 10. Facing south. Sediment trap located south of
property line.
Photo 11. Facing southwest. Deep drainage channels south of
project area, which collects runoff from site.
Attachment D. Grading Plan
This page intentionally left blank.
B B
B
B
B
XXXXXXXXXX
B
B B
EFOFO XXOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHX X X
OH OH OH OH OH OH OH OH OH OH OH OH OH OH OH OH OH OH OH
OH
OH
XXXXXXXXXXXX X X X X X X X X X X X X X XXXXXXXXXXXGRAVEL ACCESS ROAD (PRIVATE)
(COUNTY RD. 264)
INV.=5309.8
INV.=5310.4
EXISTING FENCE TO BE REPLACED
WITH NEW 10' FENCE (MATCH
EXISTING PERIMETER)
PROPERTY LINE
PROPERTY LINE
FUTURE
BLDG.
EXPANSION
AREA TO BE
UNDISTURBED
CONC.
RAMP
2'(H):1'(V) SLOPE
(12"-18" RIPRAP)
MATCH EXISTING GRADE AT
LOD LINE (TYP.)
EXISTING CULVERT TO BE REMOVED
EXISTING CULVERT
TO REMAIN IN PLACE
EXISTING CULVERT
TO BE REMOVED
EXISTING FENCE
EXISTING FENCE
EXISTING GRAVEL
ENTRANCE WITH CULVERT
AND 28' SWING GATE
EXISTING
COMPRSSSOR BLDG.
EXISTING BOLLARDS
Dig Safely.
THREE WORKING DAYS BEFORE YOU DIG
UTILITY NOTIFICATION CENTER OF COLORADO
www.uncc.org
CALL UNCC
1-800-922-1987
SERVICE CENTER:
BY
DRAWINGREVISIONS
NO.DESCRIPTION DATE
DESIGNED BY:
APPROVED BY:
CHECKED BY:
DRAWN BY:
TYPE:
LOCATION:
DIVISION:CITY/COUNTY :IN SERVICE DATE:
HISTORY DATE
FLOC:
®
LOCATION INFORMATION
GPS LOCATION:
LAT: 39.529293°
LONG: -107.827127°
ELEV: 5320 FT
GRADING MAP
SCALE: 1" = 20'
LEGEND
EX. MAJOR CONTOUR
EX. MINOR CONTOUR
MAJOR CONTOUR
MINOR CONTOUR
LIMIT OF GRADING DISTURBANCE
DRAINAGE FLOW ARROW
SPOT GRADE
CUT & FILL NOTES:
1.CUT AND FILL SUMMARY IS PROVIDED FOR
CONVENIENCE AND REFERENCE ONLY AND SHALL NOT
BE USED FOR BIDDING PURPOSES. IT IS THE
CONTRACTORS RESPONSIBILITY TO PERFORM THEIR
OWN EARTH WORK ANALYSIS.
2.CUT AND FILL SUMMARY DOES NOT ACCOUNT FOR
SHRINKAGE/SWELL FACTORS OR FOUNDATION/TRENCH
SPOILS.
3.EVALUATION ASSUMES GRUBBING AND TOP SOIL
STRIPPING IS 0" AND RE-SPREAD IS 0". VOLUMES WILL
VARY IF FIELD CONDITIONS DETERMINE THAT DEPTH OF
TOPS SOIL IS DIFFERENT FROM THE ASSUMPTION.
4.EXISTING GRAVEL REMOVED DURING GRADING
OPERATIONS MAY BE USED FOR REPLACEMENT OF NEW
GRAVEL ONLY IF GRAVEL IS CLEAN AND FREE OF
SEDIMENT DEPOSITS. CONTRACTOR SHALL GET
APPROVAL BY AN AUTHORIZED XCEL FIELD
REPRESENTATIVE PRIOR TO PLACEMENT.
APPROXIMATE CUT AND FILL VOLUMES:
GROSS SITE CUT: 817 CU YD
GROSS SITE FILL: 190 CU YD
NET SITE: 627 CU YD (CUT)
APPROXIMATE TOP SOIL VOLUMES: (SEE CUT & FILL NOTE 3)
TOP SOIL STRIP: 0 CU YD
TOP SOIL RE-SPREAD: 0 CU YD
TOP SOIL REMOVAL: 0 CU YD
APPROXIMATE GRAVEL VOLUMES (SEE CUT & FILL NOTE 4):
YARD GRAVEL: 675 CU YD (NEW GRAVEL ONLY)
NOTES:
1.CONTRACTOR TO USE EXTREME CAUTION WHEN GRADING IN AND
AROUND EXISTING UTILITIES. CONTRACTOR SHALL FIELD VERIFY
LOCATION AND DEPTH PRIOR TO START OF CONSTRUCTION.
2.EXCAVATE SOILS AS NECESSARY TO COMPLETE PROPOSED
CONSTRUCTION. UNLESS OTHERWISE DIRECT (REFER TO
GEOTECHNICAL REPORT), USE ALL EXCAVATED SOILS AS FILL ON SITE.
ANY SOILS THAT CANNOT BE UTILIZED ON SITE SHALL BE LOADED
DIRECTLY ONTO TRANSPORT TRUCKS AND HAULED TO OWNER'S
APPROVED LOCATION. ANY IMPACTED SOILS ENCOUNTERED SHALL BE
LOADED SEPARATELY AND SHALL NOT BE COMMINGLED WITH CLEAN
SOILS.
3.A REPORT OF THE SUBSURFACE INVESTIGATION IS MADE AVAILABLE
TO THE CONTRACTOR AT TIME OF BIDDING. THE BASE BID SHALL
INCLUDE LAND BALANCING ACTIVITIES BASED ON THE ASSUMPTION
EXCAVATED SOIL CAN BE REUSED AS NECESSARY CONSTRUCTION.
UPON REVIEWING THE SUBSURFACE INVESTIGATION, CONTRACTOR
SHALL INCLUDE THE FOLLOWING AS ALTERNATIVE:
3.1.OVER-EXCAVATE AREAS OF UNSUITABLE SOILS AND STABILIZE
AREAS PER THE SUBSURFACE INVESTIGATION. ESTIMATE
QUANTITY OF OVER-EXCAVATED AREAS AND REPLACEMENT
BACKFILL IN EACH AREA, ALONG WITH THE TYPE OF BACKFILL.
ACTUAL QUANTITIES WILL BE VERIFIED DURING CONSTRUCTION
PER THE DIRECTION OF THE GEOTECH CONSULTANT AND
OWNER'S REPRESENTATIVE, WITH DETAILED CHANGE ORDERS
SUBMITTED TO OWNER.
4.ALL EROSION CONTROL MEASURES SHALL BE IN PLACE PRIOR TO
EARTHWORK OPERATIONS.
5.CONTRACTOR TO ENSURE POSITIVE DRAINAGE, AND PROVIDE
UNIFORM SLOPES BETWEEN NEW AND EXISTING GRADES TO AVOID
RIDGES AND DEPRESSIONS.
6.ALL SPOT GRADES SHOWN ARE FINISHED GRADE UNLESS OTHERWISE
NOTED.
7.ALL SOFT AND ORGANIC MATERIAL MUST BE REMOVED FROM ROAD
AREA. ALL REMOVED MATERIAL SHALL BE REPLACED IN 8" LIFTS AND
COMPACTED TO 90% MODIFIED PROCTOR.
8.SANDY SOILS SHOULD BE STABILIZED PRIOR TO THE PLACEMENT OF
GEOTEXTILE OR AGGREGATE BY SCARIFYING 12-INCHES MINIMUM,
MOISTURE CONDITIONING, AND COMPACTING THE SUBGRADE WITH
LARGE VIBRATORY COMPACTION EQUIPMENT.
PROPOSED RIPRAP
PROPOSED
COMPRESSOR
BUILDING
FF=5316.33
APPLICANT NAME:
Cheryl L. Diedrich, CPL
Xcel Energy | Responsible By Nature
Senior Agent, Right of Way & Permits
1123 West 3rd Ave., Denver, CO. 80223
P: 303-571-3116 C: 303-908-0299 F: 303-571-3284
06-24-22
Attachment E. Erosion and Sediment
Control Plans
This page intentionally left blank.
6/23/20226/24/2022Chad Campbell
COUNTY RD 264CONC.RAMPLODLOCPROPOSEDMOUNTAINWESTPIPELINEFENCEEXISTING CULVERT TO BE REMOVEDEXISTING CULVERTTO BE REMOVEDVTCEXISTINGFENCEFENCE TO BEPERMITTEDSEPARATELY BYMOUNTAINWESTPIPELINEPROPOSEDCOMPRESSORBUILDING42'-6"x33'-6"PROPERTY LINEPROPERTY LINEFUTUREBLDG.EXPANSIONEXISTING FENCE TO REMAIN IN PLACEEXISTING CULVERTTO REMAIN IN PLACEEXISTINGCOMPRSSSOR BLDG.RS OP IP IP OPsupply before removing this cove
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rNO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/24/2022, 02:14:02 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP.DWG-02_INITIAL_CM_MAP
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDIPLAJKJKRS1080EXISTING CONTOURSFLOW DIRECTIONPROPOSED ABOVE GROUND PIPINGPROPOSED FENCELIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLROCK SOCKINLET PROTECTIONOUTLET PROTECTIONEXISTING CULVERTLODLOCVTCNOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.OP6/22/226/22/226/22/22
10435316.70TSC10445316.67TSC10795313.81TSCBBBBB11265314.44TSCXXXXXGGGGGGGXXGATEGATEGATE8" GAS LINEEXPOSED IN WASHOUTCOMPRESSOR BUILDING8" RISERWESTERN SLOPEGAS CO.BK. 669, PG. 461WESTERN SLOPE GAS CO.BK.806, PG. 938FLOOR ELEV.:5314.44'FLOOR ELEV.:5314.77'BURNER PADCOOLER PADSEPARATORPADEMPTY PADEMPTY PADSTAIRCASEPADSTAIRCASEPADSTAIRCASEPADODORIZERRTUPADSWALLOW LANE(DIRT)EMPTY PADNW1/4,SEC. 18,T6S, R93WNE1/4,SEC. 13,T6S, R94W10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPEPROPOSED 100'X60'EASEMENT12" STEEL PIPEINV. 5312.2'12" STEEL PIPEINV. 5311.5'12" CMP PIPEINV. 5313.5'12" CMP PIPEINV. 5314.0'8" STEEL PIPEINV. 5310.4'8" STEEL PIPEINV. 5309.8'BBBE13035317.97UCT1 B13045318.19UCT113055318.74UCT118825314.41TSC18835315.05TSC18845314.98TSCGGGGGGGGGG G G G
GGGGG
FOG GGGG G
XOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHXXOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOH6" CMPINV. 5310.9'6" CMPINV. 5308.7'LOST SIGNALLOST SIGNALLOST SIGNALSINK HOLESSINK HOLESGRAVEL TURNAROUNDUTILITY PADGRAVEL BERM PITLOST SIGNALABOVE GROUNDPIPING (TYP.)ABOVE GROUNDPIPING (TYP.)FLOOR ELEV.:5314.41'FLOOR ELEV.:5315.05'FLOOR ELEV.:5314.98'CONTROL POINTCP6 SEH OPCGRAVEL BERMPITWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUT12" CMPINV. 5317.6'12" CMPINV. 5316.5'4' BARB WIRE FENCE4' BARB WIRE FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCECLOUGH SHEEPCO., LLC.CLOUGH SHEEPCO., LLC.SITE SIGNXXXXXXXXXXXXXXXXX X X X X
X
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COUNTY RD 264CONC.RAMP2'(H):1'(V) SLOPE(12"-18" RIPRAP)LODLOCPROPOSEDMOUNTAINWESTPIPELINEFENCEEXISTING CULVERT TO BE REMOVEDEXISTING CULVERTTO BE REMOVEDVTCEXISTING PIPELINETIE-IN BELOW GRADEEXISTINGFENCEFENCE TO BEPERMITTEDSEPARATELY BYMOUNTAINWESTPIPELINEPROPOSEDCOMPRESSORBUILDING42'-6"x33'-6"PROPERTY LINEPROPERTY LINEFUTUREBLDG.EXPANSIONEXISTING FENCE TO REMAIN IN PLACEEXISTING CULVERTTO REMAIN IN PLACEPROPOSED 2022BURRIED PIPINGEXISTING 8"FROM RIFLE GASPLANTEXISTING 8" TORIFLE GAS PLANTCUTTING BACK EXISTINGRETIRED PIPING ANDCAPPING/ BLIND FLANGINGPROPOSEDINSTRUMENT AIRBUILDING 20' X 12'EXISTINGCOMPRSSSOR BLDG.PROPOSED GASANALYZERBUILDING 8' X 16'EXISTING CULVERT(UNDER EXISTINGDRIVEWAY)EXISTING ROADSIDESWALE(DRAINS TO THE WEST)RS OP IP CD IP OPPSCo IS NOT ANTICIPATING USINGTHIS DRIVEWAY FOR ACCESS. IF ITIS USED, A VTC WILL BE ADDED.supply before removing this cove
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WARNING: Disconnect the main po
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r PROPOSEDCONTROLBUILDING 10' X 14'NO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/24/2022, 02:14:15 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP.DWG-03_INITERIM_CM_MAP
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDLAJKJK1080EXISTING CONTOURSFLOW DIRECTIONPROPOSED ABOVE GROUND PIPINGPROPOSED UNDERGROUND PIPINGPROPOSED FENCELIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLRIPRAPROCK SOCKINLET PROTECTIONOUTLET PROTECTIONCHECK DAMEXISTING CULVERTLODLOCVTCRSIPOPCDNOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.6/22/226/22/226/22/22
10435316.70TSC10445316.67TSC10795313.81TSCBBBBB11265314.44TSCXXXXXGGGGGGGXXGATEGATEGATE8" GAS LINEEXPOSED IN WASHOUTCOMPRESSOR BUILDING8" RISERWESTERN SLOPEGAS CO.BK. 669, PG. 461WESTERN SLOPE GAS CO.BK.806, PG. 938FLOOR ELEV.:5314.44'FLOOR ELEV.:5314.77'BURNER PADCOOLER PADSEPARATORPADEMPTY PADEMPTY PADSTAIRCASEPADSTAIRCASEPADSTAIRCASEPADODORIZERRTUPADSWALLOW LANE(DIRT)EMPTY PADNW1/4,SEC. 18,T6S, R93WNE1/4,SEC. 13,T6S, R94W10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPE10" PVC VERTICALPIPEPROPOSED 100'X60'EASEMENT12" STEEL PIPEINV. 5312.2'12" STEEL PIPEINV. 5311.5'12" CMP PIPEINV. 5313.5'12" CMP PIPEINV. 5314.0'8" STEEL PIPEINV. 5310.4'8" STEEL PIPEINV. 5309.8'BBBE13035317.97UCT1 B13045318.19UCT113055318.74UCT118825314.41TSC18835315.05TSC18845314.98TSCGGGGGGGGGG G G G
GGGGG
FOG GGGG G
XOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHXXOHOHOHOHOHOHOHOHOHOHOHOHOHOHOHOH6" CMPINV. 5310.9'6" CMPINV. 5308.7'LOST SIGNALLOST SIGNALLOST SIGNALSINK HOLESSINK HOLESGRAVEL TURNAROUNDUTILITY PADGRAVEL BERM PITLOST SIGNALABOVE GROUNDPIPING (TYP.)ABOVE GROUNDPIPING (TYP.)FLOOR ELEV.:5314.41'FLOOR ELEV.:5315.05'FLOOR ELEV.:5314.98'CONTROL POINTCP6 SEH OPCGRAVEL BERMPITWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUTWASHOUT12" CMPINV. 5317.6'12" CMPINV. 5316.5'4' BARB WIRE FENCE4' BARB WIRE FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCE6' CHAIN LINK FENCECLOUGH SHEEPCO., LLC.CLOUGH SHEEPCO., LLC.SITE SIGNXXXXXXXXXXXXXXXXX X X X X
X
X
COUNTY RD 264CONC.RAMP2'(H):1'(V) SLOPE(12"-18" RIPRAP)PROPOSEDYARD GRAVELPROPOSEDCONCRETEEXISTING PIPELINETIE-IN BELOW GRADEEXISTINGFENCEFENCE TO BEPERMITTEDSEPARATELY BYMOUNTAINWESTPIPELINEPROPOSEDCOMPRESSORBUILDING42'-6"x33'-6"PROPERTY LINEPROPERTY LINEFUTUREBLDG.EXPANSIONEXISTING FENCE TO REMAIN IN PLACEEXISTING CULVERTTO REMAIN IN PLACEPROPOSED 2022BURRIED PIPINGEXISTING 8"FROM RIFLE GASPLANTEXISTING 8" TORIFLE GAS PLANTCUTTING BACK EXISTINGRETIRED PIPING ANDCAPPING/ BLIND FLANGINGPROPOSEDINSTRUMENT AIRBUILDING 20' X 12'EXISTINGCOMPRSSSOR BLDG.MATCH EXISTING GRADE ATLOD LINE (TYP.)PROPOSED GASANALYZERBUILDING 8' X 16'EXISTING CULVERT(UNDER EXISTINGDRIVEWAY)EXISTING ROADSIDESWALE(DRAINS TO THE WEST) CDPSCo IS NOT ANTICIPATING USINGTHIS DRIVEWAY FOR ACCESS. IF ITIS USED, A VTC WILL BE ADDED.supply before removing thi
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r PROPOSEDCONTROLBUILDING 10' X 14'NO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/24/2022, 02:14:25 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP.DWG-04_FINAL_CM_MAP
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDLAJKJK1080EXISTING CONTOURSFLOW DIRECTIONPROPOSED ABOVE GROUND PIPINGPROPOSED UNDERGROUND PIPINGPROPOSED FENCELIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLRIPRAPROCK SOCKINLET PROTECTIONOUTLET PROTECTIONCHECK DAMEXISTING CULVERTPROPOSED YARD GRAVELPROPOSED CONCRETELODLOCVTCRSIPOPCDNOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.6/22/226/22/226/22/22
COUNTY RD 264EXISTINGACCESS ROADSLODLOCVTC1620162116221623162416251624162616251628162916271626162716281620162116221623VTCCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFEXISTING TWO TRACK ACCESSROAD. THIS ROAD WILL BERESTORED AS A TWO TRACKACCESS ROAD AS NEEDED.CFSCLSCLCFCFNO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/20/2022, 01:57:46 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\STAGING_AREA.DWG-05_STAGING_AREA
SHEET NO.JOB NO.REVISION NO.DATESTAGING_AREA.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDLAJKJK1080EXISTING CONTOURSFLOW DIRECTIONLIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLCONSTRUCTION FENCESEDIMENT CONTROL LOGSCLLODLOCVTC6/20/226/20/226/20/22NOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.
COUNTY RD 264EXISTINGACCESS ROADSLODLOCVTC1620162116221623162416251624162616251628162916271626162716281620162116221623VTCCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFCFEXISTING TWO TRACK ACCESSROAD. THIS ROAD WILL BERESTORED AS A TWO TRACKACCESS ROAD AS NEEDED.CFSCLSCLSMSEE CONTROL MEASURE DETAILSHEET 08 FOR SEED MIXCFCFNO. BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/20/2022, 01:57:54 PM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\STAGING_AREA.DWG-06_STAGING_AREA_FINAL
SHEET NO.JOB NO.REVISION NO.DATESTAGING_AREA.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LEGENDLAJKJK1080EXISTING CONTOURSFLOW DIRECTIONLIMITS OF CONSTRUCTIONLIMITS OF DISTURBANCEVEHICLE TRACKING CONTROLCONSTRUCTION FENCESEDIMENT CONTROL LOGSEED AND MULCHSCLLODLOCVTCSMRECLAMATION PLAN:1. EXISTING VEGETATION - MOUNTAINWEST PIPELINE OWNS THE PROPERTY WHERE THESTAGING AREA IS LOCATED. ACCORDING TO MOUNTAINWEST PIPELINE, THE EXISTINGDOMINANT PLANT COMMUNITY AND VEGETATION IS DISTURBED GRASSLAND DOMINATED BYCHEATGRASS (BROMUS TECTORUM), ANNUAL WHEATGRASS (EREMOPYRUM TRITICEUM),HALOGETON (HALOGETON GLOMERATUS), RUSSIAN THISTLE (SALSOLA TRAGUS), AND KOCHIA(BURINGBUSH) ( BASSIA SCOPARIA). (ERODIUM CURCUTARIUM). INFESTIATIONS OFSTORKSBILL (ERODIUM CICUTARIUM) WERE ALSO OBSERVED. A SAGEBRUSH (ARTEMISIATRIDENTATA), GREASEWOOD (SACRCOBATUS VERMICULATUS), AND RUBBER RABBITBRUSH(ERICAMERIA NAUSEOSA) COMMUNITIES EXISTS ON THE SOUTHERN SIDE OF THE AREA. PSCOWILL PLAN TO PERFORM WEED MANAGEMENT PRIOR TO USING THE STAGING AREA ANDMONITOR FOR WEEDS PRIOR TO AND AFTER SEEDING.2. SOIL INFORMATION - THE SOILS ARE COMPRISED PRIMARILY OF ARVADA LOAM (HSG C). A FULLSOIL REPORT MAY BE FOUND IN THE DRAINAGE REPORT. TOPSOIL WILL BE SALVAGED TO THEEXTENT FEASIBLE AND USED TO RESTORE THE STAGING AREA AFTER THE USE BY PSCO ANDITS CONTRACTORS. STOCKPILES LEFT FOR 90 DAYS OR MORE WILL BE COVERED.3. ALL AREAS DISTURBED BY PSCO WILL BE RESTORED BY REMOVING ALL STAGING MATERIALAND EQUIPMENT, RIPPING THE SOILS, PLACING THE SALVAGED TOPSOIL, ADDING SOILAMENDMENTS, SEEDING AND MULCHING. THE SEED MIX IS PROVIDED ON SHEET 8. THE AREAWILL BE MONITORED FOR GROWTH AND WEED MANAGEMENT UNTIL FINAL STABILIZATION ISACHIEVED. EXISTING TOPOGRAPHY AND DRAINAGE IS NOT ANTICIPATED TO BE CHANGEDDURING PSCO'S USE OF THE AREA FOR STAGING. .6/20/226/20/226/20/22NOTES:1. PROJECT BOUNDARIES, AND CONSTRUCTION LIMITS ARE APPROXIMATE AND MAY BEMODIFIED IN THE FIELD. CONTROL MEASURES ARE SHOWN AS GRAPHICAL FIGURES AND DONOT REPRESENT ACTUAL SIZE OR SHAPE OF CONTROL MEASURE.2. COMPRESSOR STATION LIMITS OF CONSTRUCTION ARE APPROXIMATELY 1.2 ACRES ANDCOMPRESSOR STATION SOIL DISTURBANCE IS APPROXIMATELY 0.9 ACRE. STAGING AREAPROJECT CONSTRUCTION LIMITS ARE APPROXIMATELY 0.6 ACRE AND STAGING AREA SOILDISTURBANCE IS APPROXIMATELY 0.6 ACRE. TOTAL PROJECT LIMITS OF CONSTRUCTION AREAPPROXIMATELY 1.8 ACRES AND TOTAL PROJECT SOIL DISTURBANCE IS APPROXIMATELY 1.5ACRES.3. WORK WILL CONSIST OF UPGRADING EXISTING COMPRESSOR STATION.4. BIG REDS OR ROCK SOCKS MAY BE USED IN PLACE OF SEDIMENT CONTROL LOGS OR ROCKSOCKS.5. FINAL RESTORATION WILL CONSIST OF GRAVEL AND CONCRETE AT THE COMPRESSORSTATION. STAGING AREA WILL BE RESTORED WITH AN APPROPRIATE SEED MIX AND MULCHAFTER THE USE IS FINISHED. THIS AREA IS OWNED BY QUESTAR AND IS BEING USED AS PARTOF AN AGREEMENT BETWEEN PSCo AND MOUNTAINWEST PIPELINE.6. STAGING EQUIPMENT STORAGE, PARKING AND MATERIAL MANAGEMENT WILL OCCURPRIMARILY IN THE STAGING AREA.7. EN ENGINEERING PROVIDED SURVEY, DESIGN AND GRADING. WWE PROVIDED TEMPORARYSTORMWATER CONTROL MEASURES (AKA BMPS).8. RECEIVING WATERS: ROADSIDE SWALES AND CULVERTS, PIONEER DITCH, AND ULTIMATELYCOLORADO RIVER.
NO.BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/20/2022, 11:37:27 AM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP.DWG-07_DETAILS
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LAJKJK6/20/226/20/226/20/22
NO.BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/20/2022, 11:37:46 AM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP.DWG-08_DETAILS
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LAJKJKSEED MIX6/20/226/20/226/20/22
NO.BY DATECOMMENTSAPPROVALSCALEDETAILCHECKDESIGNPlot Date/Time: 06/20/2022, 11:38:06 AM; Z:\PROJECT FILES\09\091-034\091-034.7900\CAD-GIS\CAD\01_DWGS\INITIAL_FINAL_CM_MAP.DWG-09_FODS
SHEET NO.JOB NO.REVISION NO.DATEINITIAL_FINAL_CM_MAP.dwgDESCRIPTIONMEMBER UTILITIESFOR THE MARKING OF UNDERGROUNDBEFORE YOU DIG, GRADE, OR EXCAVATECALL 3-BUSINESS DAYS IN ADVANCECENTER OF COLORADOCALL UTILITY NOTIFICATION1-800-922-1987LAJKJK6/20/226/20/226/20/22