HomeMy WebLinkAboutDrainage Reports - 06/09/20001
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ADDENDUM TO THE DRAINAGE AND EROSION CONTROL REPORT
FOR LOT 1 OF THE HIGHLINE AUTOS P.U.D.
LOCATED IN THE MAIL CREEK BASIN
F Report
JUN 6 2000
PREPARED FOR
MR. GIUSEPPE DeMARCO
and the MBI CORPORATION
MAY 24, 2000
PREPARED BY
STEWART & ASSOCIATES
103 SOUTH MELDRUM STREET
P.O. BOX 429
FORT COLLINS, CO 80522
TEL. 970-482-9331
FAX. 970-482-9382
IN
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Table of Contents
Page
1-2
Letter and text
3
Vicinity map
4-5-6
Calculations
APPENDIX.
Original report
POCKET
Original grading and drainage plan
Revised grading and drainage plan
TEWART
S $,ASSOCIATE$ .
' Consulting Engineers and Surveyors
' May 24, 2000
' Mr. Basil Hamdan
Stormwater Utilities
' City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522-0580
' Dear Basil,
' Mr. Giuseppe DeMarco, the owner of Highline Auto Sales desires to construct a new office
and service building on the west portion of his lot. The east part of the lot was developed in 1996,
by the construction of concrete curbs, paved driveways and parking areas and a modular sales office.
' The property is located at 4321 South Mason Street and is Lot 1 of the Plat of Highline Autos
P.U.D. The property is located in the Mail Creek Drainage Basin.
' The west portion of the lot which is proposed for development has an area of 23,200 square
feet. The existing ground cover of this west portion of lot I is light vegetation and the proposed
development will cover 17,800 square feet of the total 23,200 square feet with hard surface.
Additional detention will be provided in the new parking lot for the added imperviousness.
' When the east part of lot 1 was developed in 1996, a drain pipe was stubbed to the west portion of
the lot, and this existing stub will now be extended to pick up the release from the new detention
pond area. The detention ponding area will release into two area inlets constructed in the parking
' lot. The release rate will be controlled by horizontal restrictions plates placed just below the inlet
grates on the area inlets. A 6 inch pipe will be extended to the west from the north area inlet to the
' railroad right-of-way, and the west end of the pipe will be covered with filter fabric and 1 1/2 inch
rock. The purpose of this pipe is to drain the low spot in the railroad right-of-way by allowing the
water to seep into the storm pipe system. Should this low spot be caused to overflow by flows from
' the north and south along the railroad right-of-way, the overflow will just go into the Highline Auto
detention pond system.
' The proposed release is based on 0.5 c.f.s. per acre, which is the standard criteria for release
into the McClelland Drive Interceptor storm drain. There is offsite flow from the west part of the
carwash located north of the site. The area of the carwash which flows into the Highline site is 0.44
' acres. This offsite flow from the carwash will cause the Highline ponding system to overflow so we
propose to increase the release rate by 0.22 c.f.s., which is the allowable release from the 0.44 acre
offsite carwash.
1
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft Collins, CO 80522
' 970/482-9331
Fax 970/482-9382
I
' Overflow from the Highline ponds is at elevation 37.30 and the overflow from the proposed
new ponding area on the west end of the site will be to the east into the existing ponding area on the
' east portion of the site, and then to the south and east and eventually into South Mason Street.
The minimum floor elevation of the building will be at 5038.3 which is one foot above the
pond high water line.
The volume of the proposed new detention ponding area is 7104 cubic feet, which is greater
' than the required 4975 cubic feet, so this extra detention volume will take care of some of the offsite
flow from the carwash. The owner will dedicate a permanent easement for drainage and stormwater
detention for the new detention ponding area.
' A request is hereby made for a variance from the requirement for water quality procedures.
' The project is an addition to an existing site which provides no water quality methods and there are
no practical ways to incorporate water quality procedures into this area.
Erosion control will be provided for this new construction by installing straw bale filters
' around the area inlets prior to paving.
' The erosion control escrow for this project will be the minimum $1,000;
The storm drainage design and calculations for this project are in compliance with the City
of Fort Collins Storm Drainage Criteria.
This report for the addition to the Hghline Autos site is an addendum to the original Highline
' Autos drainage report prepared in 1996. A copy of the original report is included in the appendix of
this report.
Sincerely,
4502
Phillip I. Robinson L
' PIR/meh & �•�'
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STEWART&ASSOCIATES 103 S. PH 482-93 1 F X F4882 9 COLLINS, CO 80521
Consulting Engineers and /S/urrvee�yoors
By: hlTz Date: —=� / Client: �1 i 1 h l!f)e *Vt 0S Sheet No. --�; of _
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� APPENDIX
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Finn, A oved Report
are a
DRAINAGE ROSION CONTROL REPORT FOR
OF THE HIGHLINE AUTOS P.U.D., A REPLAT O:
LOTS 19 29 39 49 AND 5 OF TROUTMAN P.U.D. PHASE TWO
LOCATED IN THE MAIL CREEK BASIN
PREPARED FOR
DON SVITAK
PREPARED BY
STEWART & ASSOCIATES, INC.
103 SOUTH MELDRUM STREET
FORT COLLINS, COLORADO 80521
970/482-9331
MAY 2891996
May 28, 1996
Mr. Basil Hamdan
Stormwater Utility
City of Fort Collins
P.O. Box 580F
ort Collins, CO 80522
' Dear Basil:
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STEWART&kSSOCIATES
Consulting Engineers and Surveyors
The following report is a revision to a portion of the Replat of the Troutman P.U.D. Phase
Two, which was approved in June, 1985.
The site is located in the McClellands Mail Creek basin. The runoff from this site is into the
McClellands Drive Interceptor storm drain system, which was constructed in 1979. This storm drain
system drains most ofthe area between College Avenue on the east, the Burlington Northern Railroad
on the west, Harmony Road on the south and Horsetooth Road on the north. The outfall of this
system is into Mail Creek. The previously determined allowable release rate of new development
which drains into the McClellands Drive Interceptor storm drain system is 0.5 cfs per acre.
The Highline Autos site is a revision of the layout of building and parking on the middle 1/3
ofthe Replat of Troutman P.U.D. Phase Two. This middle 1/3 is being replatted as Lot 1 of Highline
Autos P.U.D. Only the east 155 feet of the total 275 foot depth of Lot 1 is being developed. The
west 120 feet of Lot 1 will be left in its existing condition. The Burlington Northern Railroad right-
of-way abuts the west line of Lot 1. The existing conditions of the railroad right-of-way will not be
disturbed by this development. Before any development is done on the west 120 feet of Lot 1, plans
for the proposed development must be approved by the City.
The south'/s ofthe Replat of Troutman P.U.D. Phase Two is included on the plat of Highline
' Autos P.U.D. as Lot 2. No development shall be done on Lot 2 of this time, and before any
development can take place, plans for the proposed development must be submitted to and approved
by the City.
' When the Replat of Troutman Phase Two was done in 1985 and the carwash was constructed,
there were no restrictions placed in the pipe outlets to control the release to 0.5 cfs per acre. At this
' time, with the development of Highline Autos, a restriction plate shall be placed in the existing area
inlet on Lot 2 which will control the release to 1.89 cfs, which is 0.5 cfs per acre for the total 3.78
acre Replat of Troutman Phase Two. There is an existing low area on Lot 2 and on the rear of Lot
' 1 which will provide on site detention for the volume above the 1.89 cfs release rate.
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
' 970/482-9331 .
Fax 970/482-9382
The proposed construction will accomplish two goals. The first will be to construct the
Idighline Autos site on the east 155 feet of Lot 1 with all ofthe drainage facilities necessary to provide
detention and release for the Highline autos site so the it can stand alone when additional
development takes place on Lot 2 or on the rear of Lot 1. The second will be to provide allowable
release for the total 3.78 acre Replat of Troutman Phase Two with detention volume being provided
on the existing undeveloped low areas of Lot 1 and 2.
This report was prepared in compliance with the City of Fort Collins Storm Drainage Criteria.
Sincerely,
Phillip I. kobinson, P.E. & L.S.
Vice President
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TABLE OF CONTENTS
PAGE
1,2 and 3 TEXT OF DRAINAGE AND EROSION CONTROL REPORT FOR
HIGHLINE AUTOS WHICH IS THE EAST 155 FT. OF LOT 1
4 TEXT OF DRAINAGE REPORT FOR OVERALL AREA OF REPLAT OF
TROUTMAN PHASE TWO
5 Vicinity Map
6 Highline Autos site runoff
7 Highline Autos onsite detention required
8 Highline Autos onsite detention provided and release
9 Offshe flows from carwash to North
10 Capacity of existing 12" storm drain
11 Kutter's pipe flow chart
12, 13, 14 Erosion control
15 Erosion control collateral required
16 Total detention required for overall area of Replat of Troutman Phase Two
17 Size of restricted outlet for overall area of Replat of Troutman Phase Two
18 Total detention available for overall area of Replat of Troutman Phase Two
Pocket Highline Autos Grading and Drainage Plan
(2 maps) Replat Troutman PUD Phase Two Grading, Detention and Storm Drainage Plan
1
EXISTING SITE LOCATION AND CONDITIONS FOR HIGHLINE AUTOS LOCATED ON
' THE EAST 155 FEET OF LOT 1
Lot 1 of the Highline Autos P.U.D. is a 1.26 acre site covered with heavy vegetation. The
' site is located on the west side of South Mason Street approximately 500 feet south of Troutman
Parkway. Mason Street is developed on the east and the Burlington Northern Railroad right-of-way
' is located to the west. The railroad right-of-way has fiirly heavy vegetation and has a low area which
doesn't appear to drain. We propose to not disturb the railroad right-of-way with this development
of the east 155 feet of Lot 1.
' To the north of Lot 1 is an existing carwash facility. There is an existing detention pond
located on the east side of this carwash which flows into an area inlet. The outflow pipe from the
' area inlet drains to the south in an existing 12 inch PVC. This 12 inch outflow pipe crosses Lot 1 and
Lot 2 as it drains to another existing area inlet located on Lot 2. From the area inlet on Lot 2, a 15
inch pipe drains easterly and ties into the back of an existing curb and gutter catch basin located on
' the west curb of South Mason Street. The outfall from this catch basin is piped east across South
Mason Street to a curb and gutter catch basin located on the east curb of South Mason Street, and
the outflow is then piped to the east to tie into the McClelland Drive Interceptor storm drain.
Lot 2 ofthe Highline Autos P.U.D. is 1.28 acres covered with heavy vegetation. Both Lots
1 and 2 drain in general to the east toward South Mason Street but there are several flat spots.
' Existing runoff from Lots 1 and 2 will enter the existing area inlet on Lot 2, or if there is enough to
overflow the inlet it will be onto South Mason Street and then into the existing curb and gutter catch
basin located on the West curb of South Mason Street.
PROPOSED SITE DEVELOPMENT AND DRAINAGE FACILITIES ON THE EAST 155 FEET
' OF LOT 1
The east 155 feet of Lot 1 of the I-rghline Autos P.U.D. will be developed as an auto sales
lot with curbs, paved drives, parking and a small sales office. The remaining west 120 feet of Lot 1
and all of Lot 2 will be left undeveloped in the existing condition.
Detention wM be provided on the new paved parking for the difference between the 100 year
developed nmofffrom the east 155 feet of Lot 1 and the allowable release from the east 155 feet of
Lot -1.
The area ofthe east 155 feet of Lot 1 is 0.715 acres therefore the total allowable release will
be 0.5 x 0.715 equals 0.36 cfs. This runoff release will be through two area inlets into the existing
12 inch drain pipe running north to south across Lot 1. The allowable release rate of 0.5 cfs per acre
appears to be about a 4 year historic runoff from this small site, however, the overall quantity of
runoff into the existing pipe system will be reduced for any larger storms because of the detention
being provided. The required ponding volume of 5396 cubic feet will occur at a depth of 1.0 feet,
and the maximum pond volume of 7197 cubic feet will occur at a depth of 1.3 feet. Overflow from
the pond will be to the south toward the existing area inlet located on Lot 2.
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OFFSITE FLOWS ONTO LOT 1
The Burlington Northern Railroad right-of-way can possibly contribute offshe runoff to Lot
1, but since there is an existing low spot on the railroad right-of-way which retains runoff on the
right-of-way, offsite flows from the right-of-way are not expected. However, should there be a storm
large enough to produce offsite flows from the railroad right-of-way, this offsite flow will go east
across the undeveloped west 120 feet ofLot 1 and flow into and over the parking lot detention pond
on the proposed development. The overflow ofthe pond will be southerly across the east part of Lot
2 toward the existing area inlet on Lot 2. Overflow from the inlet on Lot 2 is onto South Mason
Street. The development ofthe east 155 feet ofthe Idighline Autos P.U.D. will not block or alter the
present path of offshe flows from the railroad right-of-way, and these offsite flows can pass through
the proposed development without causing adverse effects to the new site.
The existing carwash facility to the north contributes offsite runoff to Lot 1 in two locations.
le, if�S
The easterly 0.44 acres of the carwash drains onto Lot 1 near the west lime of Lot 1. This runoff
which is Q2 = 0.80 cfs and Q100 = 2.81 cfs, historically drains toward the low spot in the railroad
right-of-way. This flow will not be altered or affected by the proposed development on the east 155
feet of Lot 1. As stated before, any overflow from this low spot which drains east across the west
120 feet ofLot 1 will cross through the proposed parking lot detention pond and overflow to South
Mason Street. The southerly portion of the carwash facility to the north, which amounts to 0.23
acres, will also flow onto Lot 1 at the amount of Q2 = 0.52 cfs and Q 100 = 1.61 cfs. This offsite
flow will drain south across the existing paved drive and will be intercepted by the proposed new curb
to be constructed on the southerly edge of the existing paved drive. This curb will carry the flows
east and then south into the proposed parking lot detention pond with any overflow being across Lot
2 and onto South Mason Street. This offshe flow will not cause any problems to the proposed
development. The remaining 0.50 acres of the carwash facility drains to an existing detention pond
located on the driveways ofthe carwash. This pond outflows through the existing 12 inch pipe which
flows south across Lot 1. The runoff quantities from the 0.50 acres are Q2 = 1.13 cfs and Q100 =
3.50 cfs.
' There will be no appreciable offsite flow from Lot 2 located to the south of Lot 1, and also
no offsite flows from South Mason Street.
' Since the detention pond and release rate are sized only for the proposed development of the
west 155 feet ofLot 1, the net effect that the offske flows from the carwash will have is that the pond
will fill faster and that downstream flows will be less, especially during smaller storms.
NEW DRAINAGE FACILITIES
' The parking lot will be developed as a bowl shaped detention pond with outflow through two
area inlet structures to be constructed over the existing 12 inch PVC storm drain pipe. Restriction
plates will be installed horizontally just under the grates. These plates will have 2.25 inch diameter
' restricted openings. This will allow existing flows in the pipe line to pass through the area inlets
unrestricted. The existing flow in this pipeline is runoff from the existing area inlet located on the
carwash facility to the north.
I
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' There will be a 12 inch PVC storm drain pipe stubbed 120 feet to the west from the new
southerly area inlet located on Lot 1. This pipe stub will then be available to provide drainage for any
' future development to the west. The west end of the stub will be plugged at this time.
EROSION CONTROL
' The Highline Autos P.U.D. site is located in a high rainfall erodibility zone and in a moderate
wind erodibility zone.
Construction will begin with the stripping of the east 155 feet of Lot 1. The west 120 feet
' of Lot 1 and all of Lot 2 will not be disturbed, except for the sewer service trench across the west 120
feet of Lot 1. This trench is to be reseeded immediately after completion.
' Only the east 155 feet of Lot 1 which is an area of 0.715 acres is included in the erosion
control calculations.
' After this east 155 feet of Lot 1 is stripped and graded, the stormdrainage facilities and curbs
will be installed. Inlet filters will be place over the area inlets. Gravel base will be placed in the
driveway and parking areas. The foundation for the building will also be constructed during the time
' of the concrete work.
Wind erosion barriers will be provided by the installation ofthe curbs and building foundation.
' The disturbed area of this site is less than 1 acre and the diagonal distance across the site is about 250
feet, so wind erosion should not be a problem.
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' DRAINAGE AND DETENTION FOR THE TOTAL AREA OF THE REPLAT OF
TROUTMAN PHASE TWO
The total area of Replat of Troutman Phase Two is 3.78 acres and the allowable release rate
is 1.89 cfs. A restriction plate with a 5.5 inch diameter opening shall be placed in the existing area
' inlet on Lot 2. This will control the release to the allowable 0.5 cfs per acre for the total 3.78 acre
site.
' Detention for the total 3.78 acre Replat of Troutman Phase Two site is calculated to be
16,443 cubic feet. The existing low areas on Lots 1 and 2 will provide 23,288 cubic feet of detention
before overflow into South Mason Street occurs.
This release rate and detention will keep the entire site within the allowable limits.
' When Lot 2 or the rear of Lot 1 is developed in the future, detention and restricted release
shall be provided on these new developments.
' The runoff from the carwash area will be onto Lot 1 and then across Lot 1 into the low
detaining area of Lot 2, so that all of the runoff from the carwash site will now be detained.
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STEWART&ASSOGATES 103 S. MELDRUM, FORT COLLINS, CO 80521
PH. 482-9331 FAX 482-9382
' Consulting Engineers and Surveyors
By: P/K Date: 3 !? 2C Client: _ T%an S Vi ' G IT Sheet No. 6 of
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Consulting Engineers and Surveyors
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Consulting Engineers and Surveyors
By: 12)9 Date: c Client: 72ap SI/ t fa �f Sheet No. 8 of
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o1�FIGF 5-1 z (Z_ [Qr_6TS)
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STEWART&ASSOCIATES PH. 482- 331RF FAX 482-938OLLINS, CO 80521
Consulting Engineers and Surveyors
By: F)%Z,, / Date: 3 Client: 120n -5y/ ><a Sheet No. 9 of_
Project: /Yi FJ I! ne Au -Os eP V D
Subject: 04i574e •�)o IS t-on Gar-wczS�'7 4z/ 170r44
AREA O/= FRO""T
(easy) FOF{TtOn/ vF
c41ZWA5N To -40RT,9 u/14/CH
pRAIN5 ONTO FRdNT p/?vEMENT
OF ti%Gh/L/Mr A(JTO
/4rea = O. 23 A c.
.
c = 0. It
7"<:� = 10 Min (/" i n)
Qz °_ C =
(0.4) l(2.5)( a-Z3) = 0 - S Z
c;s
Qmu ° Cf G1A=
(Q (7)(0.23) c /• 61
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t?C{AINS olkJTO RE/a:lz_ (INDEVELOPr(O PA>iT._'01= _i4IGHG.1NE -.9dT0
0.73
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= GlR = 0.73(2.S (O.f+)= 0.80 C S.
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g'C3E� O C FIiON7. e-q-S� POIZ?10i1/_.or- 70 .✓OR7l , wrilcH
DIZA�INS TO F_xl;3T. ARP_^ /hlLET_LOCI-?7EO ON 'CARt✓ASH 51TC
C- -- a F Tc- r
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STEWART&ASSOCIATES PH 482 9 31 FAX
4488FORT
9 COLLINS, CO 80521
Consulting Engineers and Surveyors
By: P J rZ Date: 3 ! Client: �O h S v i TG fr Sheet No. L of
Project: Lo i- I 14 T c; line Ad 16Fs 0• i.
Subject: CQpa GI�Y o-F c'xiStlh c 54-orl�x drGr_a__ %�PJ
l2Y pvG runni»�
,-slofG 0,-5 %
Frame 4-,('UTTEF15
wi4-4aVf- jze0.C-4
r7o4f0 sal/4-4 aCr0Sf Lo%
n= 62,01Z / s1
e—L41 If�T G�pC? <�i Yy FlaL,,i?�5
Z� ?, cis l /
Solutions by Kutter's Formula
Yokes o! 'p' .
O O 00 p000000
55
4.5
S.S
6.0
6.5
7.0
Fig. 14. Diagram for the solution of Kutter's formula for circular pipes
flowing full.
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RAINFALL PERFORMANCE STANDARD EVALUATION
---------------------.-----------�---------------------------------
PROJECT: East--. 155' Lai- 1 14)S 41j -e .4✓dot P✓D STANDARD FORM A
COMPLETED BY: DATE: 1
------------------------------------------------------------ ------
DEVELOPED ERODIBILITY As Lsb Ssb Lb Sb PS
SUBBASIN ZONE(ac) (ft)M (feeM (0)
--------------------- --- _----_------- ------------ --
F_L.ut. I 0.71. Z50 5-0 0.5;71 72.2
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EFFECTIVENESS CALCULATIONS
PROJECT: E a s t- 155 L o f1 N i Sh l i,) e A u or P, (/, V, STANDARD FORM B
COMPLETED BY: DATE: I
Erosion Control C-Factor P-Factor
Method Value Value Comment
Rare 5011 /. 00 /. 00
concreiC buildi�5 0,0/ 1.O4
I n 1 e� ��ticrs I. Uv 0,y0
c�ra�c) bast v. of 1.00
exl's�in5 pvfA4 0.0) 0.04
MAJOR
PS
SUB
AREA
BASIN
BASIN
(Ac)
CALCULATIONS
Lo+-
72.Z
0.7/S
cohcref� b115 Q.1! Ac
c�, aVeI bale 0.36-Ac
exiS;ihS paveme F 0.0¢-Ac
,19are soil 0.105A-•
rJ.7�S
W4,� o , eQ
G-Fr- = (f - 0.31 x 0,1) X 100
/ G
MARCH 1991
8-15
DESIGN CRITERIA
I
19-
CONSTRUCTION SEQUENCE
,ROJECT: Fq-< / SS I L c+ N to bAto AtAos P. V. D, STANDARD FORM C
QUENCE FOR 19 96 ONLY COMPLETED BY: DATE: 9
Indicate by use of a bar line or symbols when erosion control measures will be installed.
Fjor modifications to an approved schedule may require submitting a new schedule for
roval by the City Engineer.
YEAR 5G
MONTH
OVERLOT GRADING i
�ND EROSION CONTROL I
Soil Roughening
Perimeter Barrier sjJ4 ;ene
'Additional Barriers !
Vegetative Methods l j
Soil Sealant
' Other cvrbf Fd e I
�INFALL EROSION CONTROL
STRUCTURAL: I. j
Sediment Trap/Basin
Inlet Filters I
Straw Barriers j I
Silt Fence Barriers I j
Sand Bags I 4
Bare Soil Preparation ; I
Contour Furrows
Terracing
Asphalt/Concrete Paving
! i
Other
' VEGETATIVE: i
Permanent Seed Planting
Mulching/Sealant
Temporary Seed Planting i
Sod Installation
Nettings/Mats/Blankets
' Other
'
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�RUCTURES: INSTALLED BY MAINTAINED BY
VEGETATION/MULCHING CONTRACTOR
ITE SUBMITTED APPROVED BY CITY OF FORT COLLINS ON
MARCH 1991
9.16
DESIGN CRITERIA
STEWART&ASSOCIATES 10 S. ME DRUM, F1 FAX ORT COLLINS, CO80521 l j
Consulting Engineers and Surveyors
382
By: _PI J? Date: 3 / 3 ?( Client: Don Sv t Sheet No. _of_
Project:— 1 5 5 / of Lot / AU719 L/
Subject: r1'Os I Q n < o r7 i r- o f C o 11 <e a/
�rosiah Cah,
Ie'O LF silk
r e 5 ee cl 5 e "'e r
IJ
1
r-oJ Ga ciii{icf 7�?{�vi1,e J
ihr)e-- -P4er} ,k lwoo ec'
te^Ce o,* 2..50�LF
i rent 4 ( 7-0aa S F a t 0, I
cos4- -ta res«--�ofwl s5-1
0. 7G Ac c,4- J 30d,v6
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STEWART&ASSOCIATES PH. 482-9331MELDRUM
FAX 482-938COLLINS,
X82-9380LLINS, C080521
Consulting Engineers and Surveyors
By: p 1 R Date: I �9C Client: 1�0 �/ .SL-i %a 1.- Sheet No. 16 of
Project: � 1, I i h /tv o S ''J / To REPEAT TKO VTMAAl PH95F Tv0517E)
Subject: 707-/9L DF_1Ft/T1Qx1 1Z�6G1u1r2£D Fat Lars l allo 2 yrm eff0ZVJASH To n/rana
TaTI-4L- AlZFA
_ 3.7Gfex
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de-ve.IaDel
R, 4
Loi' I = o,7/S A
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lvork
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[iardSv1r Gce oa
ccrwas4 _ 049e 14e
1a ��.S.Co pee
an
0, z 1-'4
3.78
G=
0,20
C -
0.2.0
c _
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G=
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STEWART&ASSOCIATES PH. 482- 3311RFAX 482-9380LLINS,C080521
Consulting Engineers and Surveyors
By: Pi 1Z Date: ¢)29/9C Client: �c h Sv i Sheet No. � of
Project: A vias To- TAL RERArTROVTMAy Fag 5E TWO SITE
Subject: S i z e a E=xi SJ/ n q /-) rea /n /e>L a�x Le 2
/low0.�te r-eleare /,(99 e-;r
Det4-4 fro, Nwc. )-a rnv(fF-{ = 37,5-- 32= 5.5
/✓ l.8Y��3 =_ 0.1(7 SF - Z4- st 1'n
USA f? 5.5_ in�ti dT�treier O�en?
STEWART&ASSOCIATES PH 482 93 DRY X 482 9 COLLINS, CO 80521
Consulting Engineers and Surveyors
By: P7 Date: TJ27� Client: Do v) SV i i a k Sheet No. /0 of
Project: dianL4e- Ao4ys P02 %OT/- L RfPL/aTTKO U7M,a✓➢14AJfTu/U517E
Subject: lUT/-aL DGIFn/rldn/ U01_t/Nlr- ON LUTS / ANC Z
USING EX15-rING LOW /a TZEH ON LOT Z
777e i-ivLa) de4en+jo -. uojvrxe _ on LvYs I o, 2 ((`�e-�orr
OV er--"(o,✓ occurs I hio / orc7n 5LrCe4 is GLS TO VOw5
�0!2_h U area 06)41^1 1a�a� volvmf
37. S
Rewired ✓o(ur�e
1067 Y�141 Gl+ w/aTER
37.5 — z3z�b
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ZZ50
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ZiSO
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CAP
WTI UNI
POINTS IV PITT IF POT PALMS 0
wim-c TOP
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unL y l LLLYAIIDYV
. 31,10
ROPER . SPOT E ATMON
O"TO, AVOO4VNA(.E LiASIN "HOARY
5/NOm AREA IS DEIENINM' POND
INLET FILTERS
it L+--o—�SN.T
FENCF
—M—
MST. STORM DRAIN
STORM DRAIN
_ _..._.___._..._ III- ..-._.._,..__,,.._.�,.,.............. ... .........
VOL OF IFT" p OFPoNO AT OV(FF.OW = ]T91 ITT. GT
ANT GRAVEL FILTERS AFTER PANNG
OEoiu pG ONC VP pv/4Flnw+ 1,3 cT
.3. IMS Ib1 4 Sli FENCE ALONG 1M BACK CE THE K£SI CURB
DRA/NAGE SUAAMALRY�; (4[yv+r 1rtoyLr•u PNFsFye) AONG S. MASON STREET.
4KA: ) TS A A. RESEED THE DISTURBED AREA /YICOARlY AFTER COMVLEDON Qi
INSTALLATION OF RIE SEWER SERMME.
ALLOw.ABLE PFLIASE• 3.TD.os. /A)<<s
C uWWE GGISK HIOUMNIS AVTO MVELOF'A.e"r 11^'0
LOT 2 RFNA/NNG UNGEVELGV[O nJp/NCLUOi/.L
OEV[LO INTO
C✓ 4PSM TO MRTw c O.SZ
M QUIC!p Ol TENTION= /6043 LOP 0,377 OF
PROW OEO OETENT/ONc z3z99 cc. 0.53 AG
100 vGe wATFO 3VAF4" ELEVO- 37.3
AVTO REPAIR
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