HomeMy WebLinkAboutRICKETTS SUBDIVISION - 9-88 - SUBMITTAL DOCUMENTS - ROUND 1 - DRAINAGE REPORTPRELIMINARY STORM DRAINAGE REPORT
FOR
RICKETTS SUBDIVISION
STEWART & ASSOCIATES, INC.
214 NORTH HOWES STREET
FORT COLLINS, COLORADO 80521
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STEWARTT&ASSOCIATES
Consulting Engineers and Surveyors
February 5, 1988
Mr. Robert Smith
Director Storm Drainage Utility
City of Fort Collins
P 0 Box 580
Fort Collins, Co. 80522
Dear Bob:
The proposed Ricketts Subdivision is a single family residential
subdivision located North of West Mulberry Street between the Tenth Green
Subdivision and Impala Drive. The ten acre subdivision has 2.85 acres
in the West Vine Drainage Basin and 7.17 acres in the Canal Importation
Basin. An existing ridge divides the land into the two basins. The
land has moderate slopes and has an existing house adjacent to Mulberry
Street and some out buildings which will be removed.
There is a small part of the Poudre High School tennis courts that
drains onto the portion of the West Vine Drainage Basin of the Ricketts
Subdivision. Also, the Impala Subdivision is an off site area that drains
onto the Ricketts Subdivision. The Impala Subdivision has on site
detention.
It is proposed to provide a detention pond for the entire ten acres
at the low point in the middle of the subdivision. The runoff from the
North portion of the subdivision will be collected at a curb inlet in
the North Ricketts Way cul de sac and piped South out of the West Vine
Drainage Basin to the detention pond. The runoff from the South Ricketts
Way cul de sac will flow on the surface North to the detention pond.
The flows from the detention pond will then be piped South to the existing
storm drain in Mulberry Street. Philander Court runoff will not be
detained and will flow on the surface to West Mulberry Street.
Low flows will be allowed to run through the storm pipe system to
the Mulberry Street storm sewer. A restriction plate in the manhole
at the detention pond will restrict the straight through flow to the
historic runoff rate of 2.10 c.f.s. When a greater than the two year
historic storm occurs the runoff will be forced into the detention pond.
The pond will provide 53,000 cubic feet of detention which will also
include that which is required for the Philander Court lots. The runoff
from the Impala Subdivision will flow thru the Ricketts Subdivision
detention pond.
The storm drainage runoff calculations and the mass diagram and
a copy of the drainage and grading plan are included as a part of this
report.
If you have any questions concerning this report, please call.
Sincerely,
James H. Stewart Cn�c^L _ = r? Z. -�
and Associates, Inc.
214 N. Howes Street ,o
Richard A. Rutherford, P.E. & L. . S
P0. Box 429 ;y�j'•; F. F, L•,.'•.
Ft. Collins, CO80522 President .,� ;-, ••..:..•
303/482-9331
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