HomeMy WebLinkAbout1ST STOP PLAZA - MINOR SUBDIVISION - 53-95 - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTFinal Drainage Report
1st Stop Plaza Minor Subdivision
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and South property lines. Straw bales will be placed at the discharge point of the detention pond.
After the discharge pipe has been completed, a rock filter will replace the straw bales.
The storm water runoff calculations, detention calculations, erosion control calculations and
the grading and drainage plan are included as a part of this report. The erosion control cost estimate
is also enclosed.
This drainage report and the design of the drainage system are in compliance with the City
of Fort Collins Storm Drainage specifications and criteria to the best of my knowledge.
If you have any questions regarding this report, please call.
ISincerely,
I Richard A. Rutherford, P.E. & L.S.
President
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enclosures
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STEWART&ASSOCIATES
Consulting Engineers and Surveyors
November 21,1995
Mr. Basil Hamdan
Stormwater Utility
City of Fort Collins
P.O. Box 580
Fort Collins, CO 80522
Dear Basil:
The following is the final storm drainage report for 1st STOP PLAZA MINOR
SUBDIVISION. The site is situate in the Southwest 1/4 of Section 1, Township 7 North, Range 69
West ofthe 6th P.M., Fort Collins, Colorado. The site contains a net area of 3.5509 acres more or
less. It is in the Dry Creek Drainage Basin. The site is bounded on the West by North College
Avenue, on the North by a retail area, on the East by undeveloped ground that had a previous
agriculture use and on the South by a retail area. The site slopes from West to East at an
approximate slope of 0.75%. The ground cover is buildings, asphalt and a good cover of weeds.
The site is in the Dry Creek flood plain, and a triangular shaped area in the Northeast corner
of the site is in the Dry Creek floodway.
The historic site contains the Pagoda Restaurant and its parking area. There is also an existing
asphalt area lying North and Northeast of the restaurant on the site.
On the developed site, the existing restaurant building will be demolished and three new
buildings and their parking areas will be constructed.
Onsite storm water detention will be provided in the parking area and landscape area. The
difference between the runoff from the two year historic storm and the 100 year developed storm will
be detained. The required volume is 19,800 cubic feet and the allowed discharge is 4.60 cubic feet
per second. The high water line elevation of the detention pond is 4966.65.
The pond will discharge into the existing abandoned irrigation ditch that runs along the East
and South property lines. The ditch flows Easterly and discharges into Dry Creek.
EROSION CONTROL: The site is in the moderate rainfall and wind erosion zones. The
existing building will be demolished and part of the existing asphalt will be removed. The overlot
grading will done and the three building pads will be constructed. The three foundations willbe
constructed as soon as the building pads are completed. A silt fence will be constructed along the
North, East
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
303/482-9331
Fax Arl VARP-Q.1R9
FINAL DRAINAGE REPORT
FORT
1ST STOP PLAZA MINOR SUBDIVISION
PREPARED FOR
PATERSON AND ASSOCIATES
NOVEMBER 2191995
STEWART & ASSOCIATES, INC.
103 SOUTH MELDRUM STREET
FORT COLLINS, COLORADO 80521
970/482-9331
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