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91ark A_ Steen <br />ions of Ore Processed x 1/S x O.1C x O.G00735 = acre <br />feet of water retained in the concentrates. <br />This formula is based upon assumptions that one ton of concen- <br />trates will be obtained for every eight tons of ore processed, <br />and that the water retained within the concentrates will be 108 <br />by weic}~t. O.G00735 is the amount of water, in acre feet, in a <br />ton of water, The following fore~ula shall be utilized to calcu- <br />late the annual consumptive use due to evaporation from the tail- <br />ings pond: <br />Surface acres x 2 feet = evaporation from tailings fond <br />(acre feet). <br />T'hi5 formula assumes that two feet of mater will evaporate from <br />each surface acre of water each year. Pursuant to these <br />formulas, the total ccnsumptive use is estimated to be 9.17 acre <br />feet per year for the proposed 5U ton oer day mill operating year <br />round, 29 hours per day. Applicant reserves the right to mini- <br />mize or prevent evaporation from the tailings ponds in the <br />future. <br />13. Applicant may increase the capacity of said operations. <br />Water usage shall be calculated pursuant to the formulas in <br />paragraph 12 (E) for any such increases. <br />14. Diversions made by the Left Hand Ditch Company in a dry <br />year have been approximately 0.74 acre feet per share with an <br />annual depletion to the South Platte River Syster,~ of approximate- <br />ly 0.52 acre feet per share. Diversions and depletions were about <br />twice as much in years of above average precipitation_ Therefore, <br />the Applicant's pro rata share of historic diversions based upon <br />said 20 shares in a dry year is appror.imately 14.8 acre feet per <br />}•ear with historic stream depletions of 10.4 acre feet per }•ear. <br />In a wet year, Applicant's pro rata share of historic diversions <br />is approximately 32.18 acre feet per year with stream depletions <br />of 22.53 acre feet per year. <br />15. Applicant intends to divert the water associated with <br />said 20 shares at an alternate point of diversion located on the <br />south bank of Left Hand Creek at a point whence the Scutheast <br />corner of Section 2. Township 1 North, Rar.ge 72 kest, 6th P.Fi. <br />bears S 34° 45'E, a distance of 1,590 feet, Boulder County. <br />i6. Diversions at this alternate point of diversion will be <br />made at a maximum rate of 50 gpm and only during the historic <br />irrigation season of the Left Hand Ditch Company (April 1 [o <br />Oc[ober 31). Applicant intends to store this water in presently <br />unused underground mine workings owned by Applicant located in <br />Section 12, Township 1 North, Dance 72 {tiest, 6th P.Pi., boulder <br />County. <br />17. The Applicant intends to divert water at the alternate <br />point of diversion under one of the two following alternatives: <br />4 <br />