HomeMy WebLinkAboutDrainage Reports - 12/04/1987FINAL DRAINAGE REPORT
TRACT "C" CLARENDON HILLS FIRST FILING
Fort Collins, Colorado
December 4, 1987
JAMES H. STEWART & ASSOCIATES, INC.
214 North Howes Street
Fort Collins, Colorado
80521
Final Drainage Report
Tract."C".Clarendon Hills is a 2.9340 acre residential planned unit
development in the Northwest '—, of Section 2, Township 6 North, Range
69 West of the Sixth P.M., Fort Collins, Colorado. It is at the corner
of Clarendon Hills Drive and Ashford Lane and is located in the Fossil
Creek drainage basin. The P.U.D. is adjacent to the existing detention
ponds on Tract "B" of Clarendon Hills First Filing.
Tract "C' slopes.gently.from Southwest to Northeast and does not
/�iave any offsite water cross the P.U.D. Clarendon Hills Drive flows
V/ North to sump inlets at the corner of Hinsdale Drive, which discharge
into the ponds. Ashford Drains Easterly to sump inlets between Ponds
"D" and "E", and discharge into Pond "E".
The Rational Method was used to calculate the 2, 10, and 100 year
developed runoff quantities and are shown in the table on the drainage
plan and in this report. Tract "C" was divided into four sub —basins
according to the points of discharge. Two sub —basins discharge into
Pond "A" and one each .into Ponds "B" and "C".
All of the runoff from Tract "C" discharges into the ponds. It
will be carried to the ponds on the surface in grassy swales. The
adjacent public streets will not receive any runoff from this P.U.D.
The open area of the P.U.D. and the adjacent ponds are maintained
by private homeowners associations. The Fossil Creek Master Drainage
Study does not require storm water detention however, it is provided
in this area of the basin in order to protect private ponds and drainage
facilities upstream of the main Fossil Creek channel.
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Richard A. Rutherford, P.E. & L.S.
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