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• • <br />Project: Cripple Creek Geohydrology <br />Task: Carlton Outflow Adjustment <br />CARLTON TUNNEL OUTFLOW <br />Carlton Tunnel outflow has been measured since 1982, with the results shown below. <br />Up to 1996, the measurement was taken in a flume located essentially at the portal. <br />In 1996 the outfow point was moved to the outflow from 5 settlement ponds. <br />The post-1996 flow measurement were lower than the actual outflow due to measurement differences. <br />Computation of the yield of the diatremal rockmass have allowed an evaluation of the effect of the differences. <br />The difference has been computed and is added to the measured outflow to create an estimated basin yield <br />The estimated basin yield is computed based on diatremal area of 7.19 sq.mi. <br /> <br />Averages Measured <br />Flow (9pm) Flow <br />Adjustment <br /> <br />(gpm) Total Flow <br />(gPm) Precip <br />( Inch/mo <br />) <br />1992-2002 1540 173 1712 19.47 <br />2003-2007 1300 250 1550 19.81 <br />1992-2007 1465 197 1662 19.58 <br />ANNUAL CARLTON TUNNEL FLOW CORR ECTED <br /> <br />Year Annual <br />Precip <br />inch/ ear Average Flow <br />(gpm) Cumulative <br />Precip (inch) Cumulative <br />Flow <br />acre ft <br /> 0 0 <br />1992 16.18 1622 16.18 2616 <br />1993 15.19 1637 31.37 5256 <br />1994 27.57 1716 58.94 8024 <br />1995 25.96 1864 84.9 11031 <br />1996 16.78 1716 101.68 13798 <br />1997 17.16 1662 118.84 16479 <br />1998 19.13 1693 137.965 19210 <br />1999 23.98 1776 161.945 22076 <br />2000 18.87 1705 180.815 24826 <br />2001 20.48 1792 201.29 27716 <br />2002 12.87 1655 214.16 30385 <br />2003 18.96 1516 233.12 32830 <br />2004 19.34 1550 252.46 35330 <br />2005 16.26 1581 268.72 37880 <br />2006 21.00 1556 289.72 40391 <br />2007 23.49 1549 313.21 42890 <br />Average 19.58 1662 <br />• <br />Date: 4/8/2008 <br />Page 4-1 <br />Adrian Brown Consultants, Inc.