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., DS ~~ <br />~' <br />STATE OF COLORADO <br />OFFICE OF THE STATE ENGINEER <br />Division of Water Resources <br />Department of Natural Resources <br />1313 Sherman Street, Room 818 <br />Denver, Colorado 80203 <br />Phone{303)866-3561 <br />FAX (303) 8663589 <br />http://www.waler, state.co. us <br />~ pF Cp <br />RECEIVED "eJ <br />~ r8]6 ~ <br />/ .~ <br />AUG 1 5 2007 <br />Division of r.caamation, Bill Ritter, !r. <br />August 14, 2007 Mining and Safety Governor <br />Hams D. Sherman <br />Executive Diredor <br />~~ Ms. Michelle Cunico Johnson <br />Martin and Wood Water Consultants, Inc. <br />602 Park Point Drive, Suite 275 <br />Golden, CO 80401 <br />Re: Substitute Water Su~pl~an, 120' Estates Partners Sand and Gravel Mine <br />(124 Esta~ ~,/ <br />Section 35, T1 S, RSTW, 6th P.M. - DMG # M-2001.085 <br />Water Division 1, Water District 2, Adams County <br />Approval Period: May 1, 2007 through October 31, 2007 <br />Contact phone number for Ms. Michelle Cunico Johnson: 303-526-2600 <br />Dear Ms. Johnson: <br />(vacant) <br />State Engineer <br />We have received your letter of May 9, 2007 (and amendment letter request of July 20, 2007), <br />requesting renewal and amendment of the above referenced substitute water supply plan to cover <br />depletions caused by an existing gravel mining operation. The required fee of $257.00 for the renewal <br />and $257 for the amendment of this substitute supply plan have been submitted (receipt no. 3617465, <br />and 3619207). The original supply plan was approved on September 27, 2004 and the plan was <br />renewed on June 1, 2006, and March 14, 2007. <br />Plan Operation <br />The mining plan includes a slurry wall around the perimeter of the site during mining. <br />The slurry wall has been completed; however, recent tests have indicated that there is a leak in <br />the liner. 120`" Estates Partners, the owners of the 124'" is currently working to fix the slurry wall <br />and anticipates that the slurry wall liner will be fixed and approved prior to October 31, 2007. <br />Since the pit is not considered to be lined, this amendment is required to account for and replace <br />additional depletions that result from water lost in mined product during the period of May 1, <br />2007 through October 31, 2007 <br />All mining will be accomplished using a dry mining method. The plan includes a rinse <br />water lagoon and dewatering pond contained within the slurry wall with a combined exposed <br />surtace area of 2 acres. Other consumptive uses at the site include dust control and water <br />removed in product. <br />Water pumped from the dewatering pond will be discharged into the Henderson Water <br />Ski Lake ("Ski Lake"), a reclaimed and unlined gravel pit. Evaporative losses from the Ski Lake <br />are augmented under division 1 Water Court case no. 82CW393. According to the plan and <br />based on site observations of the Ski Lake, no significant increase in evaporation wilt occur from <br />