HomeMy WebLinkAboutPALMER OFFICE BUILDING REMODEL - PDP/FDP - 22-97 - REPORTS - DRAINAGE REPORTSTEWART&ASSOCIATES
Consulting Engineers and Surveyors
103 S. MELDRUM, FORT COLLINS, CO 80521
PH. 482-9331 FAX 482-9382
By: E I R
Date:
Client:
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During the parking lot construction, rainfall erosion will be controlled by placing a sediment
trap over the detention pond outlets.
The erosion control collateral should be the minimum of $1000.
I believe that no further drainage designs or plans are necessary for this proposed remodel.
Sincerely,
Phillip I'.�Robinson, P.E. & L.S.
rrc
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STEWARFMSSOCATES
Consulting Engineers and Surveyors
October 13, 1997
Mr. Basil Hamdan
Storm Water Utility
City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522
Dear Basil,
re: Palmer Office Remodel - 3636 and 3700 S. College Ave.
Mr. Roger Thorp of the Thorp Associates, Architects, requested that I provide an analysis of
the effect of the proposed remodel on the storm drainage of this site.
The proposed remodel includes the east portion of the existing building at 3636 S. College
Ave. and the existing parking lot located directly east of 3636 S. College Ave. Also, a remodel of
the existing parking lot located east of the Palmer Florist building at 3700 S. College Ave. is
proposed.
I have attached a copy of the architect's site plan showing the proposed remodel areas. There
will be some relocation of landscaped parking lot islands, and the rear portion of the existing
building at 3700 S. College Ave. will be removed and replaced with parking, but the amount of
hardsurface remains approximately the same.
There are two existing detention ponding areas on the site. The proposed remodel will not
adversely effect the function of these ponds. It is planned to lower the bottom of the east part of
the pond at 3636 N. College Ave. This is being done so that the parking lot will not be so steep
from the east edge to the existing center pan. The capacity of the pond will be increased slightly,
but not enough to make a noticeable difference in the high water line. We have surveyed the
elevations of the existing pond and have included a sheet in this report showing these existing
grades. Also shown on the sheet are the spot elevations of the proposed lowering of the east
edge of the existing asphalt in the pond. Contours have been shown on this pond and a
calculation of the volume of the pond is included in this report.
The existing detention pond at 3700 S. College Ave. was designed in 1987 by Stewart and
Associates, and the existing detention pond at 3636 S. College Ave. was designed in 1995 by
WESTEC. Copies of the drainage reports showing these designs are included in this report. The
pond at 3636 S. College Ave. is referred to as "Pond A" in the WESTEC report.
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
TABLE OF CONTENTS
1-2
Cover letter and text of report
3
Vicinity map
4
Site plan showing elevations
5
Pond volume calculations
6-11
1987 report for 2700 S. College by Stewart
12-22
1995 report for 3636 S. College by WESTEC
I
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I
DRAINAGE REPORT
FOR
PALMER OFFICE REMODEL AT
3636 AND 3700 S. COLLEGE AVENUE
PREPARED FOR
PALMER HOUSE FLORIST
do THORP ASSOCIATES - ARCHITECTS
OCTOBER 13,1997
PREPARED BY
STEWART & ASSOCIATES, INC.
103 SOUTH MELDRUM STREET
FORT COLLINS, COLORADO 80521
970/482-9331