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Appendix A <br />Lafarge West, Inc. <br />Riverbend East <br />Substitute WaterSupplyPlan - Evaporative Losses <br />roll, Applegate <br />Group, h. <br /> <br />Month Percent of <br />Annual <br />Evaporation <br />A Gross Lake <br />Evaporation <br />(ft) <br />B <br />Precipitation <br />(in) Effective <br />Precipitation <br />(ft) <br />D Net Lake <br />Evaporation <br />(acre-ft/acre) Total lake <br />Evaporation <br />(ac-ft) <br />Nov-10 4.0% 0.15 1.01 0.06 0.09 2.56 <br />Dec-10 3.0% 0.11 0.84 0.05 0.06 1.78 <br />]an-11 3.0% 0.11 0.81 0.05 0.07 1.83 <br />Feb-11 3.5% 0.13 0.47 0.03 0.10 2.93 <br />Mar-11 5.5% 0.21 0.44 0.03 0.18 4.56 <br />A rll 9.0% 0.34 0.39 0.02 0.31 7.94 <br />May-11 12.0% 0.45 1.17 0.07 0.38 9.62 <br />Jun-11 14.5% 0.54 1.69 0.10 0.45 11.22 <br />Jul-11 15.0% 0.56 2.29 0.13 0.43 10.82 <br />Au 11 13.5% 0.51 1.64 0.10 0.41 10.34 <br />Se 11 10.0% 0.38 1.58 0.09 0.28 7.12 <br />Oct 11 7.0% 0.26 1.68 0.10 0.16 4.14 <br />Total 100% 3.8 14.0 0.8 2.9 74.9 <br />Total Exposed Water Surface = 28.1 acres (November 2010 to February 2011) <br />25.2 acres (March 2011 to October 2011) <br />Annual Predpkation = 14.0 Indies - Estimated using the COSS website's isohyet map <br />Gross Annual Evaporation = 45 Indies -Taken from NOAA Technical Report NWS 33 <br />(A) Taken from General Guidelines for Substitute Water Supply Plans for Sand and GmW Pits Submitted to The State Engineer <br />(B) Gross lake evaporation = (A) *(Gross Annual Evaporation / 12) <br />(C) Monthly precipitation distribution based on WRCC station in Brighton <br />(D) Effective precipitation = 0.7*(C)/12 <br />(E) Net lake evaporation from exposed water surfaces = (B) - (D) <br />(F) Total lake evaporation from exposed water surfaces = (E) * Total Exposed Water Surface <br />Subsetute Water Supply Plan - Operational Losses <br /> <br /> <br />Month Percent of <br />Annual <br />Aggregate <br />Production <br />A <br />Aggregate <br />Production <br />(tons) <br />B Water Used <br />For Dust <br />Control <br />(ac-ft) <br />C Water Used <br />For <br />Washing <br />(ac-ft) <br />D Total <br />Operational <br />Consumptive Use <br />(ac-ft) <br />E Total <br />Evaporative <br />CU <br />(ac-ft) Total <br />Consumptive <br />Use <br />(arft) <br />G Total <br />Lagged <br />Depletions <br />(ac-ft) <br />H <br />Nov-10 0.0% 0 1.25 0.00 1.25 2.56 3.81 6.60 <br />Dec-10 0.0% 0 1.25 0.00 1.25 1.78 3.03 5.92 <br />Jan-11 010% 0 1.25 0000 1.25 1.83 3.08 5.39 <br />Feb-11 0.0% 0 1.25 0.00 1.25 2.93 4.18 5.20 <br />Mar-11 13.3% 100,000 1.25 2.94 4.19 4.56 8.75 5.81 <br />Apr-11 13.3% 100,000 1.50 2.94 4.44 7.94 12.38 7.33 <br />May-11 13.3% 100,000 1.50 2.94 4.44 9.62 14.07 8.90 <br />Jun-11 16.7% 125,000 1.75 3.68 5.43 11.22 16.64 10.33 <br />Jul-11 16.7% 125,000 2.00 3.68 5.68 10.82 16.49 11.60 <br />Au 11 13.3% 100,000 2.00 2.94 4.94 10.34 15.29 12.18 <br />Se 11 133% 100 000 1.75 .9 4.69 7.12 11.82 <br />Oct 11 0.% 0 1.50 0.00 1.50 4.14 5.64 L M <br />Total 100% 750,000 18.3 22.1 40.3 74.9 115.2 Total Material Mined = 750,000 <br />Moisture Content = 4.0% <br />(A) Aggregate production percentages <br />(B) Amount of aggregate production based on percent of annual aggregate production. (Total Material Mined) * Column (A). <br />(C) Water used for dust control. Monthly amounts where distributed based on estimates from Lafarge <br />(D) Water Used for washing material. Monthly amounts were distributed based on washing projections from Lafarge, assuming 4% loss <br />(E) Column (C) + Column (D). <br />(F) Total lake evaporation from exposed water surfaces = Net Lake Evap * Total Exposed Water Surface <br />(G) Column (E) + Column (F). <br />(H) Total lagged mining depletions which reflect existing real time conditions in stream depletion model. <br />WA10108 L.hrp. SwSPf WVSP.Zwffi P1.0. C-bin."l I ESWWW C-bi..d R-.wd CU.a.