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Tabl~-1 <br />Lake Evaporation <br /> Gross Lakel Hayden2 Effective3 Net4 Pond Su rface5 Calculated <br />Month Evaporation (in.) PreCip. (in.) PreCip. (in.) Evaporation (ft) Area (aCYea) Evap. (ac-f t) <br /> <br />Nov. 2.00 1.28 1.20 .067 .87 .058 <br />Dec. 1.00 1.60 1.99 0 .87 .000 <br />Jan. 0.67 1.59 1.99 0 ,87 .000 <br />Feb. 1.00 1.18 1.11 0 .87 .000 <br />Mar. 2.00 1.19 1.12 .073 .87 .069 <br />Apx. 3.33 1.49 1.39 .162 ,B7 .141 <br />May 5.01 1.31 1.23 .315 .87 .27g <br />June 6.30 1.20 1.13 .431 .87 .375 <br />July 6.98 1.19 1.08 .450 .87 .392 <br />Aug. 5.55 1.46 1.36 .349 .87 .309 <br />Sept. 9.11 1.15 1.09 .252 .87 .219 <br />Oct. 2.55 1.36 1.27 .107 .87 .093 <br />TOTAL 90,00 15.90 19.90 2,207 - 1.920 <br />lValues taken from "Evaporation Atlas for the Contiguous 98 United States," published by the U.S. Dept. of Commerce, June, 1982. Values were <br />derived from monthly pan evaporation for Grand Juttction, Colorado 6E SE. <br />2AVerage monthly values fox 1951 through 1980, NOAH. <br />3Based on a procedure developed by the U.S. Bureau of Reclamation: 958 of the first inch + 908 of the second inch + 82 percent of the third inch. <br />4Net evaporation is the difference between gross lake evaporation and effective precipitation. <br />SCombined surface area of the ponds when the water level is at the principle spillway elevation <br />TR-07 8 <br />Revised 03/06 <br />