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<br /> <br /> <br />It is estimated that 1,687 acre/feet of water was turned <br />into the Vulcan Ditch in 1985 ever a period of 189 days. <br />A record of historic flows in the Vulcan Ditch is present- <br />ed in Attachment E. <br />3.2 Agricultuual Uses <br />A total of 257 acres of irrigated land are serviced by the <br />Vulcan Ditch. Of that, 149 acres (115 acres near the mine <br />surface facility and 34 acres in Section 35 East of River- <br />bend) are within the permit boundary. After the 3.©69 <br />acre/feet used in the mire construction are removed from <br />the total amount of water diverted into the Vulcan Ditch, <br />1683.931 acre/feet or 6.6 of/acre were potentially avail- <br />able for irrigation in 1985. If a calculated efficiency <br />of 66b for the six mile long ditch were applied, approx- <br />imately 4.32 of/acre of water ~°as applied to agricultural <br />land in 1985. Based on the six year average volume of <br />water diverted into the Vulcan Ditch given in Attachment <br />E, an average applicaticn rate of 3.79 of/acre has been <br />used historically. <br />3.3 Mine Uses <br />[later used for the mine project amounted to approximately <br />one million gallons or 3.1© acre-feet. A total of 2.99 <br />acre-feet oras used to suppress dust and to help compact <br />fill material used in road and facilities pad construc- <br />tion. Volume estimates are based on water truck load <br />counts. Another 0.11 acre-feet of water has been used in <br />drilling the rock tunnels. This estimate is based on flow <br />rate and hours of pumping into a holding tank. A summary <br />of crater volumes used in construction is presented in <br />Attachment E. <br /> <br />