HomeMy WebLinkAboutDrainage Reports - 07/03/2001 (2)$TEWART$,,SSOCIATE$
Consulting Engineers and Surveyors
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June 29, 2001 F011 A
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Mr. Basil Hamdan
Fort Collins Utilities
P.O. Box 480
Fort Collins, CO 80522
Dear Basil,
This is regarding the Mawson Lumber and Hardware site at 115 East Lincoln Avenue, Fort
Collins, Colorado. The site is a part of Blocks 8 and 9, City of Fort Collins. The site is a part of the
Old Town Master Drainage Basin. There is a 24" X 30" concrete storm drain that runs through the
property to the Cache la Poudre River. There are three existing storm water area inlets along the
Southeasterly side of the Mawson property that discharge into the 24" X 30" storm drain.
Mr. Tom Moore, the owner of Mawson Lumber and Hardware is proposing to concrete a 10
foot wide strip along their Southeasterly property line and another loading area that is also adjacent
to their property line that is approximately 40 feet wide. The total area of the proposed impervious
surfacing is 6,124 square feet. They will construct two open metal sheds on part of the proposed
concrete to store lumber.
The Southeasterly property line is approximately 400 feet from the Westerly bank of the
Cache la Poudre River. The existing stormwater inlets are therefore, at the downstream end of the
drainage system. The runoff from this site will discharge into the storm drain before the upstream
runoff fills the storm drain. The length of the drainage basin is approximately 3,500 feet. The time
of concentration is approximately 40 minutes.
We feel that the increase in runoff from this site does not warrant on site storm water
detention.
The site plan for the new lumber storage and the runoff calculations are enclosed. If you have
any questions regarding this matter, please call.
Sincerely,
CyC�if.71.Q�V �'I ,
Richard A. Rutherford, P.E. & L.S.
RAR/meh
James H. Stewart and Associates, Inc.
103 S. Meldrum Street • P.O. Box 429 • Ft. Collins, CO 80522
970/482-9331 9 Fax 970/482-9382
STEWART&ASSOCIATES 103 S. ME9331 LDRUMFAX , FORT COLLINS, CO 80521
PH. 482-482-9382
Consulting Engineers and Surveyors
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