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.. OFFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1313 Sherman S[ree[, Room 818 Denver, Colorado 80203 Phone 1303) 866-3581 FAX (3071866-3589 March 22, 1998 Ms. Beverly Breeze Krieger 0215 Meadowdale Lane Canon Ciry, CO 81212 RE: Agile Stone Systems Parkdale Project, File No. M-97-054 Roy Romer Governor tames 5. Lochhead Executive Director Hal D. Simpson State Engineer Dear Ms. Krieger: We have received your letter dated October 6, 1997. I apologize for not responding sooner but this project has made several changes over the last several months. I am providing a response now since we have finally approved Agile Stone's request for a temporary substitute water supply plan for this project. The plan as approved by our office includes the open quarry mining of granite to the north of Tallahassee Creek and the excavation of sand and gravel from the alluvium between Tallahassee Creek and the Arkansas River. All mining is to be done so as to eliminate the exposure of ground water to the atmosphere. Mining is proposed to begin in May 1998. The applicant will divert water from the Arkansas River for process dust suppression and roadway dust suppression. The water made available for this project is from 5 shares of the Twin Lakes Reservoir and Canal Company owned by Agile Stone Systems, Inc. No pumping of groundwater from wells will occur as originally contemplated. Your major concern is what effects, if any will the proposed blasting have on the water resources, primarily groundwater, in the area. Depending on the magnitude of the blasting, and its proximity to your well, it may be possible that the blasting could cause some temporary discoloration in the well water. However, it is not believed that this situation would exist very long. Turbidity in water is fairly easy to filter out should any occur. This area is geologically made up of sedimentary and igneous formations with major faults passing through the vicinity of the project. We are not aware of any detailed mapping of the hydrogeologic conditions in this area. You had mentioned that your well dried up completely about the same time the Agile Stone Systems did their "test blasting". Has the well began to flow again? I do not have any specific information on your well. I would be happy to review any information regarding this well if you could provide to me a permit number or location of the well. At this time, I am unable to determine whether the blasting had anything to do with it going dry. One of the best ways to determine any changes in water quality or well production is to have a monitoring program. Ideally, you should have as much data as possible prior to any mining activity. If no information has been obtained on water quality and well production yet (water levels, pumping rates, water quality, etc.) you should begin ~ STATE ~ COLORADO pF' ~O~ „s ~~ •2 r:;• . rt a~~~