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~~ <br />EXHIBIT 4.6-1 <br />New Castle Energy Corp.: Exempted Small Areas - Runoff Volumees <br /> 8/22/91 Ed Rovey, P.E. <br />10-yr, 24-hr UNIT runoff volume: 0.756 in. (Table 4.3-6 Permit Revi~ <br /> l0yr VOL Bermed AREA Hermed ARE?. <br />Small Area Area(ac) Runoff(ft3) 1 ft. deep(ft2) 9" deep(ft2; <br />Pwdr.Magazine 0.10 274.4 274.4 365.0 <br />West topsoil 1.00 2744.3 2744.3 3649.9 <br />North topsoil - 2 1.05 2881.5 2881.5 3832.4 <br />Pump house 0.002 5.5 5.5 7.3 <br />Ventilation sites 0.001 2.7 2.7 3.6 <br />TOTALS 2.15 5908.4 5908.4 7858.2 <br />Waterline corrido!' 0.33 no disturbance/ NO increased runoff <br />j ~ +-----------------------------------------------------------------------+ <br />