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a---- _: III IIIIIIIIIIIIIIII <br />• RICHARD D. LAMM <br />Governor <br />• ~ `~o~ r <br />o~ <br />~-~,. <br />O <br />b•'~+0 <br />~ lBiO <br />DIVISION OF WATER RESOURCES <br />Department of Natural Resources <br />1313 Sherman Street -Room 818 <br />Denver, Colorado 80203 <br />Administration (303) 892-3581 <br />Ground Water 1303)892-3587 <br />July 20, 1977 <br />MEMORANDUM <br />C.J. KUIPER <br />State Engineer <br />_, __ _. =D <br />~~'(. ~, ~ iJ~l <br />'-~ =~' ``• .- • ; :~~iv SECTION <br />-e;;;. o. t,atural Resources <br />TO: HARRIS SHERMAN, SECRETARY, MINED LAND RECLAMATION BOARD <br />FROM: DR. JERIS A. DANIELSON, DEPUTY STATE ENGINEER <br />SUBJECT: FLATIRON PAVING CO. - GREELEY WEST PIT, WELD COUNTY, <br />APPLICATION FOR MINING AND RECLAMATION PERMIT <br />As requested by your office, we have reviewed the application for a gravel <br />pit near Greeley. The following additional information is required before we <br />can recommend approval of the application: <br />1 . Approximately 20 alluvial wells are located within 1/4 mile <br />of the proposed pit. These wells vary from 8 to 61 feet deep <br />and from 150 to 700 gallons per minute. What affect will <br />dewatering to a depth of 40 feet have on these wells? Will <br />the applicant install monitoring wells between the mining <br />areas and his property lines to determine drawdown conditions ? <br />What evidence can the applicant provide that the mining <br />operation will have no detrimental effects on these wells? <br />2. Pages C-5 and C-6 discuss the "18-acre lake that exists on <br />the mining site and will be present after reclamation" . Our <br />measurements on sheet 5-5 (Reclamation Plan) show that this <br />lake will be approximately 35 acres in area. This would in- <br />dicate that evaporation losses will be approximately 90 acre- <br />feet annually, instead of the applicant's estimate of 45 acre- <br />feet. The applicant should review his calculations concerning <br />evaporation losses. We also recommend that the Board require <br />the applicant to provide permanent replacement water for <br />these losses in order to prevent injury to water rights in the <br />South Platte Basin. <br />oL~( <br />