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,: <br /> <br />• <br />~l`1} <br />WESTERN FUELS-COLORADO, A LIMITED LIABILITY COMPANY <br />NEW HORIZON MINE <br />July 12, 1993 <br />,. <br />RECEIVED <br />Mr. Harry Ranney <br />Reclamation Specialist JUL 1 <br />Division of Minerals & Geology Jr ~~ <br />1313 Sherman St., Room 215 <br />Denver, co. so2oz_ Division of Minerals ~ l:~e~wuyy <br />RE: MINOA AEVI3ION TO PERMIT C-81-008 FOR A 3MALL AREA EXElQPTION <br />Dear Mr. Ranney: <br />Listed below ie the hydrology data you requested from Western Fuels- <br />Colorado, A Limited Liability Company (WFC) to complete the Minor Revision <br />to Permit C-81-008 dated June 29, 1993. WFC used the computer program <br />"Storm" {Version 6.21) to arrive at the runoff volume and ditch design for <br />the small area exemption. <br />WATERSHED DATA FOR SMALL AREA EXEMPTION (AREA 3) <br />Curve number ..............95.00 <br />Area ..... ................0.50 Acres <br />Hydraulic length..........350.00 Feet <br />Elevation change..........7.0 Feet <br />Concentration time........0.07 Hours <br />Concentration time type... ScS Upland Curves \ <br />Unit hydrograph type.....:Disturbed t COn1 <br />STORM DATA ~e <br />Total precipitation.......2.0a----~-~ <br />Storm type ................ Type 1 Storm, 24 hour <br />Peak Discharge.......... .0.34 CFS <br />Discharge volume....... ..0.06 Acre Ft <br />TRIANGLE DITCH DESIGN <br />Program ...................Storm, Version 6.21 <br />Solving for ...............CFS & FPS <br />Configuration .............Triangle <br />Flow Depth (Ft)...........1.00 <br />First Side slope..........1.00 <br />Second Side S1ope.........2.00 <br />Slope of Diversion........0.0010 <br />Manning's N ...............0.035 <br />CFS...... ...... ... .1.12 <br />Cross Section Area (SQFT).1.50 <br />Hydraulic Radius..........0.41 <br />FPS ... ... ..............0.74 <br />Frounde Number............0.20 <br />oy/S <br />~U ~ ' <br />~~ <br />.~~0 <br />~~ <br />storm <br />~,~kn~ <br />l-- <br />~~~e <br />~,~~ <br />~~ <br />1, ,~~ <br />I ` <br />