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• <br />WASTE POND EMERGENCY SPILLWAY SIZING <br />BOWIE NO. 1 MINE <br />STORM EVENTS <br />25 YEAR 24 HOUR EVENT <br />100 YEAR 24 HOUR EVENT <br />The run-off calculations presented below aze calculated based <br />on the manual -Procedures for Determining Peak Flows in <br />Colorado -published by the Soil Conservation Service dated <br />Mazch 1984. <br />1.9 INCHES <br />2.5 INCHES <br />The information presented for peak flow calculations is <br />developed with the use of the computer progam STORM ver 6.21 <br />The output data from the STORM progam computer run follows <br />this section. <br />C~ <br />PEAK FLOW CALCULATIONS <br />The following peak flow calculations were compiled with <br />the computer progam STORM version 6.21. <br /> Peak Flow <br />Drainage (cfs) Event <br />WRWD 1.3 25 Yeaz, 24 Hour <br />MBWD 0.6 25 Yeaz, 24 Hour <br />UBWD 0.9 25 Yeaz, 24 Hour <br />EE 3.3 100 Year, 24 Hour <br />H 27.9 100 Yeaz, 24 Hour <br />LBWD 0.6 ZS Year, 24 Hour <br />Total 34.6 ----- <br />u <br />19 <br />