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I/ OFFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1313 Sherman Street, Roam 81 B Denver, Colorado 80203 Phone (303)866-3581 FAX (303)866-3589 http:gwww.water. state.co.us / Michelle L. Hatcher ,/// Applegate Group, Inc. 1499 West 120t" Avenue, Suite 200 Denver CO 80234-2759 ~~ ~d. STATE OF COLORADO March 6, 2007 ~ECElVED +IAR 0 8 2007 Divtston of Rarlarnation, Mining and Safety Re: Camenish Borrow Pit, Substitute Water Supply Plan DMG File No..tVl-O6-078 Section 15, T2N, R68W of the 6'" P.M. Water Division 1, Water District 5 Approval Period: February 1, 2007 through January 31, 2009 Contact phone number for Ms. Michelle L. Hatcher: 303-452-6611 Dear Ms. Hatcher: ~~ 0~F `~ ~P N~ .G~wJ~~ya \r9~f1 A, Bill Ritter, Jr. Gavemor Hants D. Sherman Executive Director Hal D. Simpson, P E. State Engineer This letter is in response to your application of January 18, 2007 requesting approval of a substitute water supply plan ("SWSP") for a sand and gravel pit operated by Flatiron Constructors, Inc. ("Applicant" or "Flatiron'). The applicant shall be responsible for compliance with this plan, but the State Engineer's Office may also pursue the landowner for eventual compliance. The required fee of $1,593 for the substitute water supply plan has been submitted (receipt no. 3612944). Plan Operation This plan seeks to replace depletions resulting from mining at the Camenish Borrow Pit ("Pit"). Gravel extracted from the Pit will be used for the CDOT I-25 widening project that will add additional lanes to I-25. Flatiron expects to complete mining at the Bile prior to December 2007. Depletions at the site will result from evaporation from exposed groundwater surface, water retained in mined product and dust control. The lagged depletions will accrue to St. Vrain Creek and will be replaced with fully consumable water leased from the St. Vrain Left Hand Water Conservancy District ("SVLH"). The project proposes to dewater the pit and pump that water into an excavated recharge area to be located in the North East corner of the property. The water will recharge back to the stream in the same approximate timing as the depletions from dewatering. The reclamation plan for the Camenish Borrow Pit is to place a compacted clay liner around the interior of the mine slopes for the purpose of preventing groundwater seepage from entering the pit. The applicant has bonded for lining of the pit through the Division of Reclamation Mining and Safety.