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1. Ugger Cache Creek Basin (See Figure E-1a)Mine Plan <br /> Figure D--2-Upper Mine Plan Area <br /> Figure D-31,ower Mine Plan Area <br /> Drainage Area-Upper Basin 1.39 square miles(890 acres) <br /> Hydraulic Gradient Distance 1.37 miles(7,340 ft.); <br /> Upper Elevation= 12800 feet(ft.); <br /> Lower Elevation= 12100 ft. Gradient=9.67% <br /> Rainfall 2 year-24 hour storm 1.5 in <br /> CN=60 -Runofffinch—0 Peak Discharge= <cubic feet per second (5cfs) <br /> Rainfall 5 year-24 hour storm 2.0 in <br /> CN=60 -Runofflinch— .06 Peak Discharge= 6 cfs. <br /> Rainfall 10 year-24 hour storm 2.6 in. <br /> CN=60 -Runoff/inch—0.2 Peak Discharge= 30 cfs. <br /> Rainfall 25 year-24 hour storm 3.0 in <br /> CN=60 -Runoff/inch-=0.33 Peak Discharge=60 cfs <br /> Rainfall 100 year-24 hour storm 4.2 in <br /> CN=60 -Runoff/inch-=.86 Peak Discharge=225 cfs <br /> 2. Lower Cache Creek Basin (See Figure E-1 a) <br /> Drainage Area–Lower Basin 0.80 sq. miles (512 acres) plus upper basin 890 acres) <br /> Total Acreage is estimated to be 1402 acres <br /> Hydraulic Gradient Distance 0.99 miles (5,230 feet) <br /> Upper ElevationM 12,100 ft, <br /> Lower Elevation=11,700 ft. C144 <br /> Gradient=7.67% <br /> December 28,2014 <br /> Colorado Division of Reclamation Mining and Safety <br /> Gold Basin Mine,Inc. <br /> Gold Basin Mine <br /> Granite,Colorado <br />