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<br />i <br />1 <br />I <br />I <br />I <br />1 <br />i <br />I <br />., <br />• <br />• <br />i <br />I <br />Pollution of Water Systems <br />During mining potential sources of pollution are turbidity in <br />gravel mine water, spillage of irrigation water, and histori- <br />cal surface water that might enter the gravel pit. Powever, <br />due to the small size of the operation and since mining will be <br />accomplished using the wet pit method, the mining operation will <br />cause no measurable adverse effects on the existing water quali- <br />ty on or in the vicinity of the mining operation. San-o-lets <br />will be utilized for employees on the property during mining. <br />After mining septic tanks approved by the Tri-County District <br />Health Department will be utilized for individual on-lot sew- <br />age disposal. <br />Water Use Durin4 Mining <br />Water for employees on site will be supplied by bottled water. <br />During mining water will be utilized for operating the crush- <br />er and for dust suppression. A maximum of 1000 gallons per <br />day, 6 days a week will be needed for this purpose. Thus the <br />yearly operating requirements for this purpose is leas than 1 <br />acre foot per year. in addition, water will be needed to estab- <br />lish revegetation around the lake. Both of these uses will have <br />negligible effect on nearby wells as they are considerab]y~less <br />than present irrigation water use. The applicant has 10 shares <br />of Fulton Ditch water, anc~ up to 100 acre feet per year of <br />water from an existing well that can be utilitzed for these <br />purposes. For the well water it will be necessary to change <br />the point of diversion to the created lake and the use. <br />Application will be made to water court for this change in use <br />and point of diviersion. <br />Evaporation from the created lake is expected to average 30 <br />inches per year. The amount. of evaporation presently that occurs <br />for irrigation is approximately 15 inches, or 53.4 acre feet per <br />year. The net effect of this amount of evaporation on surround- <br />ing wells from substituting the lake for land is expected to <br />be negligible. Regardless, at present state law does not require <br />replacement water for evaporative losses even if they are deter- <br />mined to exist. However, since the applicant is aware that there <br />is a possibility this may be required in the future by legisla- <br />tion, provisions have been made to replace any evaporative losses <br />if they are determined to exist and required by state law. <br />a <br />