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RHN Water Resou" rces Consultants LLC P.O. Box 3053 Montrose, Colorado 81402 Tel. 970-252-0278 Rebecca H. Nichols Substitute Water Supply Plan For the Scott Area of the Chambers Gravel Pit Juue 15, 2004 M- i~7~ Fax 970-252-9464 ~;a~5~d yak Il 6 X04 o7e~MrA ,~ I- l~v`11#t -,// / This report has been prepared for the United Companies in support of a Substitute Water Supply Plan for the Scott Area of the Chambers Gravel Pit east of Rifle, Colorado. Scott Pit Gravel Minin¢ Plan United Companies has contracted to mine approximately 63.7 acres on land owned by Don Scott located east of Rifle, Colorado. The property is located in the south half of the northeast quarter and south half of the northwest quarter of Section 15, T6S, R93 W, of the 60' P.M. Highway I-70 lies directly south of the property line and the Colorado River borders the north property line. The property will be an extension of the Chambers Gravel Pit, DMG Permit 112, and will be referred to as the Scott Pit. The mining will occur six days a week and will be conducted in three phases referred to as Area 1, Area 2, and Area 3 of the Scott Pit. It is anticipated that the gravel pits in the three areas of mining will be ZS feet deep and will produce 300,000 tons of material each year. It is anticipated that the Scott Pit will be in operation for less than ten years, depending upon the demand for gravel. The mined material will be primarily crushed at the Scott Pit and secondarily crushed at the Chambers Pit north of the Colorado River. The mined material will be transported to the Chambers Pit site across the Colorado River by an enclosed conveyor. During the mining, the pits will be dewatered by pump at a rate of 1000 gpm to 3000 gpm, depending on the stage of the mining. Appendix A contains a drawing of the mining plan, a topographical map with the proposed gravel pits, and an aerial photo of the mining site.