Laserfiche WebLink
<br />e <br /> <br />e <br /> <br />e <br /> <br />Design Procedure Form: Retention Pond (RP) - Sedimentation Facility (Sheet 1 of 3) <br /> <br />Designer: <br /> <br />Company: <br />Date: <br />Project <br />Location: <br /> <br />John Doe I, P.E. <br />CloseNu" Engineering, Inc. <br />Augus130,2000 <br />Heavenly Views Office Park - PPD#3 <br />Caslle Peaks, CO <br /> <br />1. Basin Storage Volume <br /> 11= 85.00 % <br /> A) Tributary Area's imperviousness Ratio (i = 1,/100) i= ,..,.:'1:,",85:':':" <br /> ...,- - -". <br /> B) Contributing Watershed Area (Area) Area = 60.00 acres <br /> C) Water Qual~y Capture Volume 0NQCV) WQCV=' :.O.2a. ~ ~:~:: watershed inches <br /> 0NQCV=0.8' (0.91 '1' -1.19 '1' + 0.78 '1)) <br /> D) Desi9n Volume, Vol = 0NQCV /12)' Area Vol = {4!i : :-:: acre-feet <br />2. Permanent Pool <br /> A) Volume: Vol_ = (1.0 to 1.5) . Vol 1.50 acre-feet <br /> B) Average Depth Zone 1 = Littoral Zone - 6 to 12 inches deep 0.75 feet <br /> Zone 2 = Deeper Zone - 4 feet to 8 feel deep Zone 2 4.00 feel <br /> C) Maximum Zone 2 Pool Depth (not to exceed 12 feet) Depth = 8.00 feet <br /> D) Permanent Pool Water Surface Area (Estimated Minimum) <br /> (Zone 1 - Littoral Zone = 25% to 40% of the total surface area) %= 40.0 acres = ,0,;222..('. <br /> (Zone 2 . Deeper Zone = 60% to 75% of the total surface area) %= "SO.O' acres = '0.333>'. <br /> Total Estimated Minimum Surface Area (AT""') %= .'.'1000". acres =d.55l;( <br /> ::.;:.,.:-- - ":,-,=.?:-' <br />3. AnnuaUSeasonal Water Balance (Q.... has to be pos~ive) Qinllow 38.00 acre-feetlyear <br /> Q..., 2.10 acre-feeVyear <br /> QSeep&!jIl!! 4.60 acre-feet/year <br /> CE,T. 2.00 acre-feeUyear <br /> a.... ,29:00 :':::: acre-feeUyear <br />2. Outlet Works <br /> A) Outlet Type (Check One) x OrifICe Plate <br /> Perforated Riser Pipe <br /> Other: <br /> B) Depth at Outlet Above Lowest PerfOfalion (H) H= 2.00 feet <br /> C) Required Maximum Outlet Area per Row, (A.,) A., = '(::$)IO( :':: square inches <br /> D) Perforation Dimensions (enter one only]: <br /> i) Circular Perforation Diameter OR D= inches, OR <br /> 0) 2" Height Rectangular Perforation Width W= 2.70 inches <br /> E) Number of Columns (nc) nc= (:....,.(::1;( .(( Number <br /> <br />UCD Feb 2000 BMP-CASFM Sem-Examples-g7, RP <br />