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~~ OFFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1313 Sherman Street, Room 818 Denver, Colorado 80203 Phone (3031 866-3581 FAX 1303) 866-3589 March 19, RECEIVEG Mitch Albert, Pn. D. APR 16 1998 Agile Stone Systems, Inc. 6435 S. Pontiac Ct. Division of Minerals & Geology Englewood, Colorado 80111 Re: Parkdale Project Gravel Pit, Substitute Water Supply Plan DMG File No. M-97-054 E% SE'/. Section 11, S%z Section 12, T18S, R72W, 6th P.M. Water Division 2, Water District 12 Dear Dr. Albert: Roy Rumer Governor lames 5. Lochhead Executive Director Hal D. Simpson State Engineer This letter is in response to your application of December 30, 1997 and subsequent submittal on January 30, 1998, for a substitute water supply plan for a rock quarry/sand and gravel pit to be operated by Agile Stone Systems, Inc. (Agile) in accordance with 37- 80-120 C.R.S. The required fee of $1,343 for the substitute supply plan has been paid (receipt 425336). The anticipated net depletion to the Arkansas River for this new operation is 1.96 acre- feet for the first year and 2.48 acre-feet for the second year with no exposure of ground water to the atmosphere. According to information submitted, no ground water was exposed prior to January 1, 1981. This operation includes the open quarry mining of granitic bedrock 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. You have provided an annual breakdown of the depletions for the first five years of the operation. Based on subsequent discussions with you by our outside consultant (Wright Water Engineers, Inc.), these values have been evenly distributed over the year to generate a table of monthly depletions. The first years depletions consist of no evaporative losses (no ground water is to be exposed in this operation), no water lost in the aggregate (material is to be dry mined), 1.38 acre-feet of water lost in process dust suppression (100 percent loss) and 0.58 acre-foot of water used for roadway dust suppression (100 percent loss). These anticipated losses have been portrayed on a monthly basis in Table 1 (Year 1) and Table 2 (Year 2). The water supplied to the Project will be pumped directly from the Arkansas River. The proposed source of replacement water for this operation is consumable water available from Agile's 5 shares of the Twin Lakes Reservoir and Canal Company (Twin Lakes). These shares carry with them an approximate per share yield of 0.93 acre-feet or 4.65 acre-feet total. Accounting for transit losses of 0.07 percent per mile over the approximately 93.5 miles between Twin Lakes Reservoir and the Parkdale Project, the five Twin Lakes shares yield about 4.35 acre-feet (0.87 acre-feet per share). This represents a transit loss .~ ~,~ ti OF COLORADO