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Casper Creek Townhouses <br />6/04/93 <br />fl <br />IA <br />88-4555 <br />CRO <br />BASIN "C" ANALYSIS <br />100-year/24-hour Design Storm <br />EXISTING SITE CONDITIONS <br />Area 1.88 acres <br />CN Value 83.0 <br />Time oi Concentration <br />The existing time of concentration travel path of Basin "C" consists of 125 feet of <br />sheet ilow over forest at 2.0 percent. The timo of concentration was calculated <br />within the computer program "WaterWorks Version 2" to be 35.22 minutes. <br />DEVELOPED SITE CONDITIONS <br />rea 0.79 acres <br />CN Values <br />Impervious Area = 0.45 acres (Rooftops - Buildings 5-S to wetland) <br />CNimpervlous — 98 <br />Pervious Area = 0.34 acres <br />CNPervlou� = 87.60 <br />Time of Concentr ta (on <br />A practic�l minimum time of concentration oi 10.0 minutes wiil be used as the <br />developed time of concentration tor Basin "B". This is a conservative assumption. <br />� <br />u <br />