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FROM-Caorado Dlvlsion of Minerals <br />Geology <br />+130?6328106 <br />T-592 P.001/003 F-393 <br />~~ ~, n.~~ <br />STATE CJF CDLOIZADO <br />OFFICE OF 7FIE STATE ENGINEER <br />Division of Water Resources <br />Department 4f Natural Resources <br />1313 Sherman 6tree4 Room 818 <br />Denver, Colorado 80203 <br />Phone (3D3) 866.3581 <br />FAX (303) 866-3589 <br />vr«w.wat2~state.co.us <br />~v~~ <br />r~ P; 2 3 206 <br />Division of Minerals and Geulnyy <br />June 23, 2006 <br />Ms. Kate A. Pickford, Environmental Protection Specialist <br />,~ Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Co 80203 <br />Re: Reclamation Permit Aonl' ion for the Allen Pit, DMG #M-2005-080 <br />Sec.11, Twp. 10 South, Rng. n West, 6s' P.M. ~~- <br />Water Division 1, Water District 23 <br />Dear Ms. Pickford: <br />F~ <br />N / . .._ <br />a~'~- <br />++ x <br />.+ <br />~ lB96 x <br />Bill Owens <br />Gtrvernor <br />81155211 GCOfgC <br />Executive Director <br />F1a1 D. Simpson, P.E. <br />State Engineer <br />This letter is in response tD the ahove referenced application for a reclamation permit for <br />the Allen Pit, Permit No. M-2005-080, filed by the Allen Drilling and Excavating Company. This <br />fetter also is in response to the letter dated May 30, 2006 from Ms. Sheela Stack of Harvey <br />Curtis & Associates, concerning the proposed Allen Pit. <br />This office reviewed and commented on the proposed mining plan for the Allen Pit by <br />letter dated February 8, 2006 (copy enclosed). Information in the fife of the Division of Minerals <br />and Geology ("DMG") for the Alien Pit indicates that the Allen Pit is proposed to be excavated to <br />a depth of approximately 10 feet and the excavation is not expected to expose ground water. <br />Based on this information, our comment letter of February 8, 2006 indicated that the mining <br />operation was not expected tD expose groundwater and therefore, a substitute water supply <br />plan would not be required. <br />Based on the comments in the May 30, 2006 letter from Ms. Stack, this office reviewed <br />the well construction reports of two existing monitoring holes (monitoring hole notice nos. <br />46101-MH and 46102-MH) that are reported to be drilled within the reclamation permit <br />boundary of the Allen Pit. Based on the information reported in those files, the ground water <br />level varies between 16 feet to 21 feet below surface at the pit site. Accordingly, at a maximum <br />excavation depth of 10 feet, it does not appear the proposed mining operation would expose <br />ground water to the atmosphere. However, in the event that ground water is exposed to the <br />atmosphere, the Applicant would be required to obtain a gravel pit well permit in accordance <br />with C,R.S. § 37-90-137(2) and (11). Ground water exposed in an excavation at this site would <br />be tributary to the Middle Fork of the South Platte River. The South Platte River is an over- <br />appropriated stream System, therefore, a substitute water supply plan approved by the State <br />Engineer or a Water Court approved plan for augmentation must be obtained before a well <br />permit could be issued for a gravel pit excavation <br />