HomeMy WebLinkAboutDrainage Reports - 10/03/1994r y i
EROSION CONTROL REPORT
FOR
PHASE TWO OF THE
ONE PROSPECT P.U.D.
PREPARED FOR
THE W.W. REYNOLDS COMPANIES
PREPARED BY
STEWART & ASSOCIATES
103 SOUTH MELDRUM STREET
FORT COLLINS, COLORADO 80521
303/482-9331
SEPTEMBER 23. 1994
STEWART&kSSOCIATES
Consulting Engineers and Surveyors
September 26, 1994
Mr. Glen Schlueter
Stormwater Utility
City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522
Dear Glen:
The W.W. Reynolds Company desires to construct Phase Two of the One
Prospect P.U.D. project. This construction will include a commercial building
and its parking lots and driveways.
All of the storm drainage facilities for the One Prospect P.U.D. are in
place. They were constructed in 1990 and 1991 per the approved plans and
drainage report.
We are now requesting approval of our proposed erosion control procedures
for this Phase Two construction. The 1990 approved report did not address
erosion control.
Included with this report are the erosion control calculations along with
a plan of the entire One Prospect P.U.D. site. This site plan shows the
existing Phase One construction and the existing vegetation on the south half
of the site, and also the propsed Phase Two construction. The existing
vegetation on the south half of the site will not be disturbed. The building
foundation will be constructed immediately, and the gravel basecourse will
be installed in the parking lots. The parking lots were rough graded during
the 1990 and 1991 construction, and some basecourse was placed at that time.
Also, a silt fence shall be placed along the south and east sides of the
project. This fence will be along the existing curb on the west side of
Prospect Parkway and along the north side of the existing concrete drain pan.
Prospect One P.U.D. is located in a moderate wind erodibility zone, so
the foundation construction and silt fence installation will provide the 200
foot barrier spacing for protection from wind erosion.
All erosion control procedures shall comply with City of Fort Collins
Criteria.
Si ncerel Y , ••� „��
n•nt �11
Phillip I. Robinson _
Vice President ca4b02a'
/rsc James H. Stewart
z.�P�! ; :•
and Associates, Inc.
��
Street
•,,'F'Ji k-7
P.O. Box 429um
to
Ft. Collins, CO 80522
303/482-9331
Fax 303/482-9382
---------------
RAINFALL
PERFORMANCE
STANDARD EVALUATION
PROJECT:
---.------------
Phase Two 0f one
---------------
,ProsPec4- pup
STANDARD FORM A
COMPLETED
---------------
BY: p)TZ
DATE: 2s
DEVELOPED
ERODIBILITY
----- -
Asb
--------- ----=---------------------------
Lsb Ssb Lb
Sb PS
SUBBASIN
---------
ZONE
-----
(ac)
(ft)
M
(feet)
(q,)
(;)
Phase
- ---- -
l�►�
! 9 U
4-00
I
7rvio
.
.
i
0
---------------------------------------------------------------------
1D1/SF-A:I9a9
EFFECTIVENESS CALCULATIONS
------
PROJECT: I7ha5e Two o+ OnP RIGS ec+ pUI7 STANDARD FORM B
!COMPLETED BY: 171 R DATE: Z3
I
Erosion Control C-Factor P-Factor
Method
-- f.Value-------ValueComment
-
------------
Bare Soil -------o0 (.00 -------- ----
3f);1din5 Fovr�da{io.-. 010( 1.00•
Grave( bcc(ec(lvr e 01LIG 1100
Sl li Fence 1• 00' 0.50
MAJOR
BASIN
r07AL
QHASE
TWo
�- PS--
M
72.6
(SUB
BASIN
AREA
(Ac)
1.90
1.
---------------------------------------------
CALCULATIONS
----------------------
5L Ild i nS 40L)Ad rJi c") _ 0.59 Ac
Gravel basecovrSe c 0.6G Ac
bcxre- 5011 = 0. Ac
r-Ya
0.37
= U. 561
EFF = / - Co.37xo.,s- X 100
----------------------------------------------------------------------
DI/SF-B:1989
CONSTRUCTION SEQUENCE
PROJECT: Phase %wo of Onto Pr0s�C4 PUP STANDARD FORM C
SEQUENCE. FOR 19 c(�- ONLY COMPLETED BY: DATE: q 2 3 I
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.
YEAR
MONTH
----------------------------
OVERLOT GRADING
WIND EROSION CONTROL
Soil Roughing
Perimeter Barrier
Additional Barriers
Vegetative Methods
Soil Sealant
Other Cone F9undaflar
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 6a6eC0ur6e
VEGETATIVE:
Permanent Seed Planting
Mulching/Sealant
Temporary Seed Planting
Sod Installation
Nettings/Mats/Blankets
Other
STRUCTURES: INSTALLED BY
S-
VEGETATION/MULCH ING CONTRACTOR
DATE SUBMITTED
HOI/SF-C:1989
I IN 1 :
17
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ART&
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APPROVED BY CITY OF FORT COLLINS ON
JANUAaY 1991 8-20 DESIGN CRITERIA
103 S. MELDRUM, FORT COLLINS, CO 80521
STEWART8,06SOCIATES PH. 482-9331 FAX 482-9382
Consulting Engineers and Surveyors
By: 17I Date: 9 Z Client: LA.,/, L,/. P. v r) o I J_f C&, Sheet No. of
Project: F/7Q s eo- T-w r) o-F
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