HomeMy WebLinkAboutEx 06a Traffic Study and correspondence with CDOTSJP1FJLJEll
l
C/s_
1 }
HI
NIT O If
13))1 T1 PI
rfl
TO
D OMPADT V0f M
ST• II I D F R II C TKMI FAO 11 LUY
C Oh\TAACUORS YARD AXE)) „V EX®',D PRAT
Parcel ID Numbers: 2393-274-01-004; 2393-274-01-003; and 2393-274-01-002
File Numbers LIPA 02-20-877; GAPA 02-20-8778; FPAA 03-20-8780
Memorandum
To: Richard Neiley, Neiley Law Firm, LLC
From: John Petaisto, PE, Yancy Nichol, PE, Principal
Date. May 7, 2020
Re: Marble Storage / Fabrication Facility - Engineering Report
12744 Highway 82, Parcel C of the Dixon Subdivision
SE Project #19226
Sopris Engineering has prepared this memo to summarize the Civil Engineering aspects for the proposed Marble Storage /
Fabrication Facility located on Parcel C of the Dixon Subdivision (PID 239327401004). The proposed storage facility will be an
approximately 33,000 square foot single level structure, with asphalt parking/drive lanes, storm water mitigation infrastructure,
and installation of the necessary utilities to support the development. Below is a summary of the feasibility of the proposed site
improvements per the Garfield County Land Use and Development Code (LUDC)
7-204.E- Drainage and Erosion Control
The existing site topography generally slopes slightly from north to south and from east to west, with slopes ranging from 2-3%
according the survey completed by Sopris Engineering in 2018. An existing 12' high+/- modular block wall retains a steep hillside
on the north side of the development. This hillside extends to the existing Dixon Subdivision main access road just north of the
development site. The existing steep hillside extends to the east side of the property from the property/fence line to the existing
staging area associated with the historic nursery operations. There is an existing modular block retaining wall along the majority
of the southern property line allowing establishing a relatively flat site approximately 4' above the Colorado Department of
Transportation (CDOT) Right of Way to the south.
The proposed building is anticipated to be built next to the existing hillside to the north A proposed swale along the north side of
the building will collect runoff from the hillside to the north and divert drainage around the proposed structure. Positive drainage is
proposed to divert drainage away from the building. A series of inlets, open channel swales, and storm collection pipes are
anticipated to collect stormwater runoff from the development and convey the runoff to proposed onsite detention facilities. The
proposed detention facilities will be sized to detain the 2- and 25-year design storm to pre development levels. Based on the
impervious area shown, the project is estimated to require approximately 3,300 c.f. of detention. The storage volume will also
accommodate for the 100-year design storm event per the requirements of 7-204C of the LUDO. This volume of runoff will be
collected in an onsite detention basins or subsurface detention chambers. Please refer to the Drainage and Grading plan for
details, Civil plan sheet C3.0.
Disconnection of impervious areas will be utilized wherever possible to help reduce mobilized sediment. The proposed detention
facility will be designed with a water quality treatment forebay meeting the requirements of 7-204C.3.d of the LUDC.
Temporary erosion control Best Management Practices will be during construction to prohibit mobilized sediment from leaving the
site during construction. A Colorado Department of Public Health and the Environment (CDPHE) permit for Stormwater
Discharges associated with Construction Activity will be obtained by the project's contractor as construction activity will impact
greater than 1 acre.
Waiver of Submission Requirements:
We are hereby requesting a 'Waiver of Submission Requirements' for drainage criteria as allowed under section 4-202 of the
LUDO. The review criteria are listed below, and our response follows in bold font.
C. Review Criteria. A waiver request shall be considered based on the following criteria:
1. The Applicant shows good cause for the requested waiver;
i Adequate design and preliminary calculations have been provided to show development can
and will comply with county development standards. The site impervious area is greater than
10,000 SF Detailed drainage design and storm water detention calculations will be provided in
support of the future Building Permit application
2. The project size, complexity, anticipated impacts, or other factors support a waiver;
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERING • LLC
civil consultants
Marble Storage, Parcel C Dixon: LIR
05/07/2020
Page 2
3. The waiver does not compromise a proper and complete review; and
4. The information is not material to describing the proposal or demonstrating compliance with approval criteria.
i. Drainage requirements have been calculated and preliminary sizing completed to ensure site
compliance with drainage criteria. Details will be provided at building permit.
4-203.L- Traffic
The site is accessed from State Highway 82 from a shared existing access that serves the Dixon Subdivision. Refer to the
separate letter to the CDOT Access Management Unit in Grand Junction, Colorado, which updates the proposed traffic for the
access permit #319038. For this proposed Marble Storage / Fabrication Facility, the proposed traffic uses are reduced from the
current access permit traffic numbers
Construction activity for the project is anticipated to be contained within the limits of Parcel C. No additional temporary roads or
access points are anticipated as part of the development's construction operations. No traffic impacts are anticipated to County
Roads as a result of the proposed improvements. Traffic impacts to Highway 82 resulting from construction are anticipated to be
associated with occasional material deliveries, gravel and concrete deliveries, and construction employee trips. Construction
traffic can be highly variable, but they are anticipated to be much lower than the existing access permit volumes
Staging and storage of materials is anticipated to occur within the development area depicted on the Site Plan. Development
area may vary based on the means and methods of the project s contractor however activity is anticipated to be contained within
the eastern portion of the parcel Heavy truck traffic is anticipated primarily during the first few months of construction in the form
of material deliveries, concrete foundation and concrete slab construction. Additional truck traffic will occur during the
construction of project access aisles and parking in the form of road base, asphalt and concrete deliveries. No traffic impacts on
Highway 82 are anticipated during construction.
Waiver of Submission Requirements:
We are hereby requesting a 'Waiver of Submission Requirements' for traffic criteria as allowed under section 4-202 of the LUDO.
The review criteria are listed below, and our response follows in bold font
C. Review Criteria. A waiver request shall be considered based on the following criteria:
1. The Applicant shows good cause for the requested waiver;
i Adequate design has been provided to show development can and will comply with county
development standards. Detailed road plan/profile and intersection design and details will be
provided in support of the future Building Permit application.
2. The project size, complexity, anticipated impacts, or other factors support a waiver;
i. Traffic impacts have been calculated, the traffic impacts will be reduced from historic traffic at
this intersection, and CDOT has confirmed that an access permit is not necessary.
3. The waiver does not compromise a proper and complete review; and
4. The information is not material to describing the proposal or demonstrating compliance with approval criteria.
i. The intersection provides access to a dead end road. For this project, other traffic numbers
beyond this intersection and Highway 82 should not be necessary.
4.203.M- Water Supply and Distribution Plan
The existing property is served by the Tepoel Well located on Parcel A of the Dixon Subdivision. Please refer to Wright Water
Engineering plans and report for further information regarding physical and legal water supply as well as water quality analysis
results.
A water service distribution line is anticipated to be extended from the Tepoel Well south toward the development site on Parcel
C as depicted on the Site Improvements and Utility Plan. The water service line will extend to the fire suppression storage tank(s)
which will utilize an internal float to maintain minimum storage volumes. A separate waster distribution service line will branch
from the mainline once onsite and will extend directly to the building's mechanical room.
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERING • LLC
civil consultants
Marble Storage, Parcel C Dixon: LIR
05/07/2020
Page 3
4.203.N- Wastewater Management and Distribution Plan
There is no municipal sewer service to the subject property. SE has performed preliminary calculations using assumptions for
the storage use with supporting office space. SE also reviewed the site soils report dated June 22, 2018 prepared by HP Kumar.
Based on the existing conditions, the installation of a site specific onsite wastewater treatment system (OWTS) to serve the
proposed development is feasible.
With input from the design team, our assumptions include a total of 4 full time employees with 20 visitors per day. The two
buildings would combined have a total of four bathrooms with four lavatories and four water closets, along with 2 kitchenettes to
include a total of 2 sinks, 2 dishwashers and 2 refrigerators with ice makers.
Based on the information provided we have calculated the design flow maximum equals 300 gpd. We have assumed the soils
are a silty loam with a loading rate of 0.65 gpd/SF. Our preliminary OWTS system includes a two compartment septic tank with
filter and riser lids to the surface, with an OWTS field consisting of three 38 foot long gravity trenches for a rectangular envelope
of 38' long by 17' wide.
The OWTS field is anticipated to be located on the east side of the development and will meet County minimum setback
requirements The OWTS plan will account for existing and proposed site constraints in accordance with the current Garfield
County and CDPHE standards. A detailed OWTS design using the HP Kumar soils report and site observation will be provided in
support of any future Building Permit application.
7-107- Access and Roadways
The existing Dixon Subdivision has direct access to Highway 82, and an existing access permit #319038 from CDOT. CDOT has
reviewed and confirmed that a CDOT access permit is not necessary. The specific sections of 7-107 are listed below and our
response follows in bold font
All roads shall be designed to provide for adequate and safe access and shall be reviewed by the County Engineer.
A. Access to Public Right -of -Way. - Shown on Plan.
B. Safe Access. (Shown on Plan. The CDOT AP is in place, the site has direct access to SH 82, the proposed
intersection improvements shown are per Table 7-107. Details will be provided at permit submittal)
The existing private drive meets the standards of 7-107. It has an approximate 28' width to the project's entrance. The
surface is paved and has an approximate 2% grade from edge of existing Highway 82 pavement to the right of way and
an approximate 8.5% grade to the project's entrance thereafter The existing asphalt apron has a deteriorated asphalt
surface. The access intersection will therefore be improved The existing asphalt will be removed, any minor
adjustments to surface grades will be made, and the access will be repaved to a distance approximately 10-ft beyond
the project's access to Parcel C. The improved access will include 11-ft travel lanes and 6-ft shoulders to the project's
access in accordance with Table 7-107
C. Adequate Capacity. - CDOT AP is in place and CDOT has confirmed that a new AP is not necessary. Refer to 4-
203.L of this report
D. Road Dedications. - The road dedication is shown on the SGM plat
A new 50' onsite easement is proposed on the SGM Plat, which will replace the existing 30' dedicated ROW Easement
within the Dixon subdivision, in order to meet minimum County standards.
E. Impacts Mitigated. - The roadway will be improved to comply with the county road standard.
F. Design Standards. - The proposed intersection improvements shown are per Table 7.107. Details will be
provided at permit submittal.
1. Circulation and Alignment. - SE has confirmed delivery truck and fire truck access and turnarounds.
Parking is separate from the loading/unloading zones. The alignments provide good line of sight.
2. Intersections. — One intersection proposed. Existing access to other parcels must be maintained.
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERING • LLC
civil consultants
Marble Storage, Parcel C Dixon: LIR
05/07/2020
Page 4
3, Street Names. - N/A
4. Congestion and Safety. — Congestion is not currently an issue, and traffic from this site will not create
congestion. Good sight lines are provided. The intersection improvements will provide clear lane
striping, improving the current condition.
5. Continuation of Roads and Dead -End Roads. - NIA
6. Relationship to Topography. - Development is on the flat section of the site, and development matches
existing condition on all sides.
7. Erosion and Drainage. - Refer to section 7-204.E of this report, details provided for permit submittal.
8. Commercial and Industrial. - Parking provided outside of loading/unloading zones.
9. Emergency Access and Egress. - Turnaround areas have been provided. Final details will be
coordinated with fire district before permit submittal.
10. Traffic Control and Street Lighting. -Will comply with Road and Bridge requirements for permit.
11. Drainage Structures. - Already in place for the existing road system. The existing structures will be
maintained.
12. Roadside Ditches. - Already in place, will be maintained.
7-109- Fire Protection
The emergency vehicle ingress/egress as well as fire protection requirements will be met with this development. Based on
previous projects within rural areas of the Carbondale & Rural Fire Protection District, water storage for fire sprinklers and a dry
fire hydrant will be provided. The site has good ingress and egress from Highway 82 and onsite, A fire truck turnaround has
been provided on the west side of the site, and is also feasible on the east side as necessary. The final access and fire
protection requirements will be confirmed with the fire district prior to building permit.
We anticipate the building will be required to have a sprinkler fire suppression system and storage tank(s) to meet a 90 minute
fire storage duration. Buried fiberglass storage tank(s) are proposed beneath the asphalt on the west side to the proposed
structure. The proposed tank(s) will be filled from the existing Topeol well and contain an internal float to maintain storage
volume. A tank distribution line will feed a fire suppression pump sized to meet the requirements of the sprinkler layout and
minimum pressures. A dry hydrant will also be connected to the fire storage tank and will provide the Fire Department with
access to the storage tanks. A detailed fire suppression sprinkler design will be coordinated with the project's Mechanical
Engineer and the Carbondale & Rural Fire Protection District. The details will be provided in support of any future Building
Permit application.
Additional Information
Natural Gas
There is no natural gas service in the area according to recent discussions with Black Hills Energy Corporation. The development
will evaluate the usage of propane or electrically supplied boilers during the HVAC design at building permit.
Telephone
According to recent discussions with CenturyLink, the property is currently provided a 25 pair telephone service to an existing
phone pedestal #12744 on Parcel C of the subdivision near the Highway 82 access point. There is ample room within the
pedestal to support future redevelopment. There is no fiber optic service within the area.
Electric
An existing single phase overhead electric line encumbers the property in an east -west alignment across Lot A and Parcel D of
the subdivision within an existing 30-ft wide Holy Cross ROW Easement (Rec. #746592). Coordination with Holy Cross has taken
place to discuss the possibility of extending 3 phase power to the site. The conceptual site and utility plan depicts extending 3
phase overhead power to the site and installing a pad mounted transformer per the Holy Cross representative.
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERINC • LLC
civil consultants
Marble Storage, Parcel C Dixon: LIR
05/07/2020
Page 5
Cable
Comcast Cable does not currently serve the subdivision and does not have any existing infrastructure in the vicinity of the
property.
Irrigation
The site has an existing 10" diameter irrigation pipe that flows from east to west across the site. We understand the existing pipe
is in poor condition, and it will need to be relocated for the proposed building and site improvements. The site utility plan shows
the approximate location for this gravity flow pipe. The final details for this pipe will be coordinated with the ditch company prior
to building permit submittal.
Conclusion:
Based on the information presented above, the proposed Marble Storage / Fabrication Facility can be feasibly constructed and
supported by the site improvements should the project obtain Limited Impact Review approval from the Garfield County
Commissioners.
If you have any questions or need any additional information, please call.
502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
Sorais ENGINEERING • LLC
civil consultants
Zimbra https://mail.sopriseng.com/h/printmessage?id=116074&tz=America/Den...
Zimbra ynichol@sopriseng.com
Fwd: Traffic Memo 19224
From : Yancy Nichol <ynichol@sopriseng.com>
Subject : Fwd: Traffic Memo 19224
To : John Petaisto <jpetaisto@sopriseng.com>
Yancy T. Nichol, P E.
SOPRIS ENGINEERING, LLC
502 MAIN STREET, SUITE A-3
CARBONDALE, CO 81623
Wed, Mar 11, 2020 01:26 PM
From: "Killian" <brian.killian@state.co.us>
To: "ynichol" <ynichol@sopriseng.com>
Sent: Wednesday, March 11, 2020 9:07:59 AM
Subject: Re: Traffic Memo
Yancy,
Sorry for the delay in response. No need for a new permit. We're okay with the existing permit.
Thanks for checking on that.
Brian Killian
Region 3 Access Manager
Traffic &t Safety
COLORADO
Department of Transportation
P 970-683-6284 I C 970-210-1101 I F 970-683-6290
222 S. 6th St, Room 100 Grand Junction, CO 81501
brian.killian@state.co.us I www.codot.gov I www.cotrip.org
On Mon, Feb 24, 2020 at 9:32 AM Yancy Nichol <ynichol@sopriseng.com> wrote:
Brian,
Please see attached letter to update the proposed estimated traffic for CDOT Access
#319038. CaII or email with any questions.
Thanks,
Yancy T. Nichol, P.E.
1 of 2 5/7/2020, 9:1 1 AM
Zim bra https://mail.sopriseng.com/h/printmessage?id=116074&tz=America/Den...
SOPRIS ENGINEERING, LLC
502 MAIN STREET, SUITE A-3
CARBON DALE, CO 81623
2 of 2 5/7/2020, 9:11 AM
1
/
\\v
,I:,'
{e.
r
10
♦
Qr
I vaorouoAsnwu ASPHALT
_
I 7$'
I
• ! I i�
'`
8
f: i
p
-
J
♦
a 1
a
77
,•
7�,
1• :ate
I,• n
v
g z .
\
xaoriormuvnF swwn4...
I
— . —
x
•
'
J
�• T j'2
/��' '1
`r
O
. .;.74,---
. . .
_
i _
t.
•
li
Aar
.r.
.
r i
• I.
II
/
,,, j
I.
�
..
1,
F
1
1 1
1
I
• •'•
•
i:
- Jet
/;
'
1 /
•/ / /
'
,
I
111'i'
`,I,li°
�71`'
I
1 I
i 1
I 1"
I
I
I
1
co I
il
...
I
I i
`
1 //
e ,
tl
I
I
l I
/
N
59 Z
Zc
/,
f;
1 r'
jrt!
1'r'i
;:.r,
:!
1,
it
tirl
AI
1 1-0
I
1
s
I
I
iI
�12f = ASSUME AV ERA
'ACCESS & PARKING
I
H•
•I
f
1 a
I�11
I
-•-
1
. -
•1
^u
,i
�
1
40W STORM
III."•
11
THAT COMPAC
`
W
N=o$
I 1
I
1
s
!
1'1
/ A !i
a
n
z r
P
/_
S DOWN TO 6' DEPTH
0
—
STORAGE STORAGE VOL
AREA ISEj 121
E CALCULATIONS
1
‘$14i::::f1!\
•ys
t
1I1
1
I€
lui
-�
Ya
•n3
n
1
i
r
.- it1i1
n
I:
i
!
i', '
Y:
ri WI
I
it
1•
z
x eta,.
I ��
i /
,.
22.923
n•
z
/
1
I
I L
.�
F•
t
y
`\
\ '
,,//' /
//, '
<%i +
,.
.i
;I
�i
I(
7.—
I 4. r• -
s l za
0
m
1 r
l��'
.� '
1
1
/.
/ ;'�u
1
`r
,,
I
y
�c3
0
1
i
1
sF
/
'il
� ;
SA
NO PO
�' 4
', •
�.
yy28�;8�a
�csa€s'
0
ysse
F <
8
I
I. \
l
/
•
'
I in 7E / 00
In at
5S�. a 0.m r rma a
a
1 r
1 i
1
2
3
i
v
s
MARBLE
STORAGE/
FABRICATION
FACILITY
a
p
g
m
Q
o
f
a
o
—°
<
et.
A
'sm"
o
PARCEL
C
DIXON
SUBDIVISION
<
<
.£
=e;
=c"
b
z M
GARFIELD
COUNTY,
COLORADO
o
o
''
cgs;
a
7.
0
:
rg
LIMITED IMPACT REVIEW
P
69
_
7
m a 44fgaraq 3
Q = r, , +ii:,irgi0p�Rs
g dd
il
g e ! h 2 FF
n
A
1 z
s l
EnEg
CC�^
ZZL
dip
m
s Q y b
��30.
c
i G n
jcor
-y�
149
oM
Ogg
Sy
!MC
$511
- ,;
a -.
ap-z"
Egn
Yn
amx
3 m==
am
c
'Id
iA
e�
M
EA;
-_s
ON3931 NOLLYA3l310dS
F
P
ON3S310NLLSIX3
11
1113b33b
0 0 0 0 0 0
66ag-§Al
c� F L o E
!MADE
. a a
gPi y = o �
sA St
g
as
A
P
M. - N r a P - P Y N
3 az }o 1g' zk. Ailigg
R9 aQ 11 FR }p��JFY i
III
i
111a2 a€ g£o1gmOFA t^_
^i TA F 5y' yi$n1 E ^ i3 S ay
zz a iiQ4
o
51g o • mum $m o� 4u y> g
ii y Q4g ^ o
En
r o f yA D F a FA if_ g'
. go
4 0"zo
oz ta a 1 = on Al to g4 1 4 3 9
• o Oa
^
g Is
0ER r; gs r. AFa$
Y • ; E S
o Y i zi7 • mg u ^ z x1
x5 a ail o� 3 g lcf
a e s o 2g m
A m 3 m Ai o 1 >` s € = s
' _i St' 2 is
5i A a g� P g`3m 2
5 �
4 fi ^a 4_
82
s ' E4
9 3 z • Y ^ g
g$ S
.0.o =
vl 0 � n s' Y o +1 yz 10
�•
90
V4
n
2,D
a
0
1
1
a
s
9(11.104
*W1'
0N3931 SLN3N9AO MINI 311S
:S31ON 3OVNIV21O V 9NIOV21S
$31ON 1ONINOO NOISO
Yr
I1,
;! •
EC'
•
nl
;
N
n
G ' \
\ \
;\a
\ f \
.Faro, Ib ilii ,,
••I
/41///;n / 1 •
1
•
IirM vie u3 Nlu�ws� 1 I. 1,1
MARBLE STORAGE/ FABRICATION FACILITY
PARCEL C DIXON SUBDIVISION
GARFIELD COUNTY, COLORADO
LIMITED IMPACT REVIEW
0
0
N
0
0
0
4
a
a
z
0
•
1 1
/j/' /
/' /
/
14
/
•
•
af
-
tan
idgf
114.
g
:i;si°t i ciinn$s
OM b sM
ssssssssai€ssgo
i€ 3a3zxyFF��z�no
ill s=ir
L a n
s n
il1Ill'
■iooeaa4XtMIy1III I
IAM i
p o noo
O 0 0 0 0 D {51 lg
R i:RR:145. 1,
gsgM000000000
iegt
s
F
fg
s5
R
Al
tt
-
o1
EEAm
c
no
O
w
0
0
ON3931 SIN3113A02)4WI 31IS
_z
(nF
BSc
;5a
sos
262
ovo So 1RE
z_c
s s t°45 ohs i
0 0
c s e nAAA pos 1
s3
Y Rpe
Q Tj"_ S �'£ Pori
y Fez �_gg -IR
1€ 5,q2: a4 PFi
gig 7431 > 4
54 i..f'o Ss O€
14 a� o £p g
Z 11 r ¢G �� "I3
y 1a7 's �C2
"o yz gilt <o al
e0 1:2" §e 'pn
Y i F
09 aao. < ;
33 R ,5
4 I F
:s310N AL1Ufl 1V213N39
0
0
ti
a
•
1
1
I
I
I
a
Z8 AVMH9IH
a
•
L.
•
"POSEbMPIW ACCESS
-I ---r—
1
1
1
i
•
i
•
•
/ wag
4
gs;s •
12?
\ k €
igs
/
I 1
I AO l 1 ?A"
Eiiii
' F,g I _11L
\I I / . -- — --- _�fli
N Nl4 fryrl 1fQgPIC 1 \
I
on
c02
c=[F
-c
o¢
3s
-J
22
4.
N
a`c1
.-n
124
ns
-t
ig
6j
gO
/ Y
F
/ lf1
• •/ 1,
I J \
Plegd DlmuvpY SatIATJ
•
v
///. ; ,
/; •
1/ e j
•
MARBLE STORAGE/ FABRICATION FACILITY
PARCEL C DIXON SUBDIVISION
GARFIELD COUNTY, COLORADO
0
Fro
LIMITED IMPACT REVIEW
/
0.1
0
•
0
0
4
0
•
0
0