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WPO200700100 Calculations 2008-03-07
Lickinghole Contribution sample computations Old Trail, phase 3, block 1, 7 Mar 2008 Cpost = 0.75 table 4 -3 on p.4 -20 of VSMH Vol.2 Cpre = 0.32 uniform for entire watershed, not based on individual site condition A = 4.34 acres Ipre = 5.4 tc of 10 min. App. 4C VSMH Vol.2 Ipost = 6.7 tc of 5 min. Qpre = Cpre *Ipre *A Qpost = Cpost*Ipost*A Qdiff = Qpost-Qpre Qdiff = 14.3 [ Qdiff /A = 3.3 , should average around 1.25cfs /acre ] R = 412.87 $ /cfs BOS Policy recovery rate (last updated 9 Feb 2005) R *(Qdiff) = 5907.75 $