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Lafarge West, Inc. <br />Duckworth Pit <br />SUBSTITUTE WATER SUPPLY PLAN <br />MONTHLY ACCOUNTING FORM <br />Month: <br />Year: <br />Prepared By: Applegate Group, Inc. <br />Date Revised: 3!17/2004 <br />AG Job #: 04-105 <br /> DESCRIPTION TOTALS FOR MONTH YTD <br />1 Sand and Gravel Production (tons) <br />2 Moisture Loss in Material (ac-ft) <br />3 Dust Control (ac-ft) <br />4 Evaporation (ac-ft) <br />2 = (tons of material mined ' 0.04 ' 2000 / 62.4) / 43560 <br />3 = (gallons used / 7.48} / 43560 <br />4 =monthly net evaporation 'exposed water surface area <br />Exposed water surface area = <br />acres <br />Month Monthly Net Evaporation (ft) <br />Jan 0.40 <br />Feb 0.39 <br />Mar 1.14 <br />Apr 1.71 <br />May 2.47 <br />Jun 1.71 <br />Jul 1.10 <br />Aug 1.23 <br />Sep 1.24 <br />Oct 0.85 <br />Nov 0.68 <br />Dec 0.45 <br />Gross Annual Evaporation = 40 inches <br />Annual Precipitation = 13.37 inches (from Longmont Weather Station (1948-2003) <br />