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Asb -4 <br />• Reservoir Liquid Volume: <br />Sedimentation Reservoir shall contain the total vol- <br />ume from a 10-year, 24-hour precipitation event. <br />Detention time for the runoff shall depend on <br />the water quality. Once the water quality meets <br />or exceeds the standards set forth in the mine <br />permit, the reservoir shall be dewatered by pump- <br />ing. <br />Volume Surface Runoff, Vsr = Q10 x Ad <br />12 in/ft <br />Liquid Volume: <br />Vsr = Oi~9 x 4.04 = 0.13 Ac-Ft <br />= 5660 Cu-Ft <br />Allow liquid volume for 1.5 10-year events 0.20 Ac-Ft <br />• <br /> <br />JAh ~.2 1`?~~ <br />