2009-04-01_HYDROLOGY - M1978210 - Laserfiche WebLink

Home Browse Search

8 DEPARTMENT OF NATURAL RESOURCES DIVISION OF WATER RESOURCES March 27, 2009 Ms. Michelle L. Hatcher ,A0 Clear Water Solutions, Inc. 8010 S. County Road 5, Suite 105 Windsor, Co 80528 RE: YSubstitute Water Supply Plan, Geisert Pit, DRMS No. M-78-210 Section 31, T6N, R65W, 6th P.M. Water Division 1, Water District 3 Approval Period: April 1, 2009 through March 31, 2010 Contact Phone Number for Ms. Hatcher.' 970-631-6070 Dear Ms. Hatcher: Bill Ritter, Jr. Governor Harris D. Sherman Executive Director Dick Wolfe, P.E. Director RECEIVED P /AP R 01 [i,u? Divisional fltiwd m11611u1 Mining and Safety We have reviewed your letter of December 18, 2008, requesting renewal of the above referenced substitute water supply plan to cover depletions caused by an existing mining operation. The required fee of $257.00 for the renewal of this substitute supply plan has been submitted (receipt no. 3635932). The original supply plan was approved on March 25, 1994 and it was most recently renewed on February 21, 2008. Plan Operation This plan seeks to replace depletions resulting from the mining operation at the Geisert gravel pit, operated by Weld County ("County"). The County operates this site to produce aggregate for road base and public works construction projects. Depletions from the mining operation during this SWSP period result from evaporation from the exposed ground water, water lost with the mined product, and dust control. No dewatering is provided or sought under this plan. The proposed replacement source is fully consumable water leased from the City of Greeley ("Greeley"). Depletions The County has completed mining in all the cells except the southeastern cell of the mining site. At build-out, the southeastern cell will expose 14.8 acres. The County continues to mine the remaining cell deeper. The gravel reserve is approximately 50 feet deep. During the period of this plan, the County anticipates the total exposed surface area in this cell will be approximately 13.1 acres therefore the total exposed surface area at this site will be 44.7 acres. According to the information submitted, 6 acres of water surface was exposed within the reclamation permit boundary prior to January 1, 1981. Due to a change in administration of evaporation from ground water exposed to the atmosphere prior to 1981, pre- 1981 credits will no longer be allowed for gravel pits which exposed ground water to the atmosphere prior to 1981 and were actively mined on or after January 1, 1981. Accordingly, evaporative depletions for such gravel pits will need to be replaced from the entire surface area of the ground water exposed in the pits. Therefore, no evaporation credit will be claimed in this SWSP for the 6 acres exposed prior to January 1, 1981. The total consumptive use of ground water at the Geisert Pit (including evaporative and operational Office of the Statekngineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303-866-3581 • Fax: 303-866-3589 www.water.state.co.us