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~~ <br />Date: November 12, 2002 <br />Project: LAFARGE WEST, INC. -GYPSUM RANCH GRAVEL PIT -RUNOFF CALCULATIONS <br />Location: SEC. 3 & 4, TSN, R85W, 6TH., P.M., EAGLE COUNTY, COLORADO <br />Subject: Overland Travel Time Calculations <br />Engineer: Colorado Civil Technologies, Inc. <br />BASIN FOR PHASE 5 -ASSUMING AREA IS BEING MINED <br />24 HR Storm OVERLAND FLOW <br />BASIN 10 YEAR <br />100 YEAR <br />N= NA N= 0.100 <br />L= NA L= 150.000 <br />P10= NA P100= 2.400 <br />Slope Et/Ft NA Slope FUFt 0.3333 <br />To10= NA <br />To100= 3.6718 <br />N = Overland Flow Resistance Factor "Tabel E-1" <br />L= Length in Feet Less Than or Equal to 300 Feet. <br />P10= 10 Year, 24 Hour Percipitation Depth in Inches. <br />P100= 100 Year, 24 Hour Percipitation Depth in Inches. <br />To10= 10 Year Storm Overland Travel Time <br />To100= 100 Year Storm Overland Travel Time <br />GRAVEL & STONE SURFACE <br />3 TO 1 SLOPES <br />