HomeMy WebLinkAboutSite Certifications - 09/04/2007North Star
IAftw design, _inc.
September 4, 2007
Jay Barber
City of Fort Collins
700 Wood Street
Fort Collins, CO 80522
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Dear Jay,
STORMWATER
RECEIVED
SE P 0 5 2007
This letter is to certify the detention and water quality ponds at Preston Center First
Filing Lot 2, (Hilton Garden Inn). The as constructed pond stage -storage table is
attached. The information presented is based on topographic survey of the detention
ponds provided by Nolte Associates on July 30, 2007 with subsequent updates.
The water quality volume is achieved in the pond at 4932.1 which is approximately 0.2'
above the design elevation of 4931.9. The 10 year detention volume is achieved at
elevation 4934.30 which is 0.10' above the design volume of 4934.2 and the 100 year
detention volume is achieved at 4935.28 which is 0.08' above the design volume of
4935.2.
The sizes of all orifice openings, water quality outlet holes and spillway have been
verified and are within acceptable construction tolerances.
Please call me if you have any questions or if you need any additional information.
306
Patricia Kroetcf�,
S1ONAL
''''1i u 0 i i n''J"
700 Automation Drive, Unit I Windsor, Colorado 80550 YAw�/Q g
970-686-6939 Phone 0 970-686-1 1 88 Fax ,, (p7Ws'
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