HomeMy WebLinkAboutDrainage Reports - 07/27/1995June 30, 1995
Mr. Basil Hamdan
Stormwater Utility
City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522
Dear Basil:
STEWART& SSOCIATES
Consulting Engineers and Surveyors
This letter is regarding the storm drainage for the proposed Brueggers Fresh Bagel
Bakery, which is situate on a part of Lot 2, Campus West Shopping Center. The site is at the
Northwest comer of West Elizabeth Street and South Shields Street intersection. The historic
site contained a convenience store and gasoline sales. The area of the site after right-of-way was
taken for the Shields Street widening is 0.1929 acres. The historic impervious area is 7259 square
feet, and the developed impervious area will be 7304 square feet. The 45 square feet increase of
hard surfacing is 0.5% of the total area and is well within the allowable increase that does not
cause the need of detention. There will be no onsite storm water detention on this site.
The drainage pattern for the site will not change. The adjacent property to the North of
the site partially historically sheet flows across the site. That pattern will not change. The
parking lot for Brueggers Bakery will sheet flow from North to South and will discharge through
the driveway to the Elizabeth Street North gutter and then East 48 feet to an existing curb inlet.
The East half of the building and the outdoor patio area will drain into fifteen 6-inch diameter area
inlets in the landscaping area and the storm water will be carried in a 4-inch diameter perforated
P.V.C. pipe to the existing curb inlet in Elizabeth Street.
The erosion control that will be provided is the foundation which will be constructed as
soon as the existing building and existing pavement are demolished. Base material will be left or
replaced in part of the parking area to preclude erosion. A silt fence will be constructed along the
East and part of the South property lines. The erosion control calculations are included with this
letter. Also, the cost of erosion control is enclosed.
if you have any questions regarding this site, please call.
Sincerely,
�...� a.
Richard A. Rutherford, P.E. & .S.
President
rsc
enclosures
James H. Stewart
and Associates, Inc.
_ . 103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
303/482-9331
Fax 303/482-9382
STEWART$,6SSOCIATES
Consulting Engineers and Surveyors
June 30, 1995
Mr. Basil Hamdan
Stormwater Utility
City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522
Dear Basil:
The following is the cost estimate for erosion control facilities for Brueggers Fresh Bagel
Bakery at the Northwest comer of West Elizabeth Street and South Shields Street.
1. Silt Fence 140 L.F. @ $2.00 $280
2. Reseeding 8404 S.F. @ $.0298 $250
The collateral will be the $1000 minimum fee.
If you have any questions regarding this cost estimate, please call.
Sincerely,
- Qom(,''
Richard A. Rutherford, P.E. & L.S. _.
President .
rsc
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
303/482-9331
Fax 303/482-9382
CONSTRUCTION SEQUENCE
PROJECT: B Fie rH $a_ -4BaK6Rr
STANDARD FORM C
SEQUENCE. FOR 19 9S ONLY COMPLETED BY: .e A 2 DATE: J &mg 79i i��s
Indicate by use of a bar line or symbols when erosion control measures will be installed
Major modifications to ..an approved schedule may_require submitting a new schedule for
approval by the -City Engineer.
99St YEAR I
MONTH j I F I M I A-I-_M_I_.1-I-J--I A --I s -1 o_-I N__ o
---------------------------- --------------
OVERLOT GRADING I
_ I
WIND EROSION CONTROL I
Soil Roughing
Perimeter Barrier
Additional Barriers !
Vegetative Methods
Soil Sealant
Other
RAINFALL EROSION CONTROL
STRUCTURAL:
Sediment Trap/Basin
Inlet Filters
Straw Barriers
Silt Fence Barriers
Sand Bags
Bare Soil Preparation
Contour Furrows
Terracing
Asphalt/Concrete Paving
Other
VEGETATIVE:
Permanent Seed Planting
Mulching/Sealant
Temporary Seed Plantinc
Sod Installation
Nettings/Mats/Blankets
Other
--------------------------------- +---- 4---- }----
+•---- ------
STRUCTURES: INSTALLED BY MAINTAINED BY
VEGETATION/MULCHING CONTRACTOR
DATE SUBMITTED
HOI/SF-C:1989
APPROVED BY CITY OF FORT COLLINS ON.
JANUAR•i 1991 8-20 DESIGN CRITERIA
EFFECTIVENESS CALCULATIONS
------------------------ -
--------------- =-----------------------------
PROJECT: 13FvaGGEres FgEsH BAe6c BAKegy _,STANDARD FORM B !I
COMPLETED BY: R q p -DATE: J+ee 2,frif�r I
I
Erosion Control
C-Factor
P-Factor
Method
--------- -
Value
Value Comment
!
------- ------------------------------
15A2.E ,50iz_-
/.00
---------
boo.
FovAIDATioAI
0.01
.1.00 O�0579At.
SILT FENCE
/.00
OSD
13:ASS MATe F_/4j
p.os
1. o-fl o• 04s? Ac.
-----------------
1
PS SUB AREA
BASIN
(%)
BASIN
(Ac)
CALCULATIONS
-----
TQ ACT
' °
7s g /o
T---
%ACT
-----
--------------------------------------------
AL,
W T C C=
�.089/x/,00) 1 (0,osm x o.or)+ �a4s�xo.os
W70 C.
= a48
wT„ P
= 0-S0
F F =
�I -- io,98,c • SU� x /oo = 76 o
ok
----------------------------------------------------------------------
HDI/SF-B:1989
RAINFALL PERFORMANCE STANDARD EVALUATION
I------------------------.----------------------------------------
PROJECT: Bjeu6aaEies Fre6.rH t3,aGec 1341cr,ey STANDARD FOI
COMPLETED" BY: RAX DATE: ,love
----------------------- =------------------ —---------- -----------•
DEVELOPEDIERODIBILITY Asb Lsb Ssb Lb Sb I
SUBBASIN ZONE (ac) �(ft) (%) (feet) (q)
--
TO%AL. ire- MOOLotArer O IgZ9/IC. Id3, / z7 --- - � ?I --�
i I
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