2015-03-31_HYDROLOGY - M1999050 - Laserfiche WebLink

Home Browse Search

1`" ` pF •Cpl 0 \yy �, T 7 tly£ h�1C• 187ro DEPARTMENT OF NA'T'URAL RESOURCES DIVISION OF WATER RESOURCES Mr. Todd Williams, P.E. Williams and Weiss Consulting, LLC 5255 Ronald Reagan Blvd, Ste. 220 Johnstown, CO 80534 John W. Hickenlooper Governor Mike King Executive Director March 24, 2015 Dick Wolfe, P.E. Director /State Engineer Re: Timnath- Connell Substitute Water Supply Plan_(WDID 0302526) Timnath- Connell Pit, DRMS File No. M- 1999 -050 (WDID 0303018) Section 3, T6N, R68W, 6th P.M. RECEIVED Water Division 1, Water District 3, Larimer County Approval Period: April 1, 2015 through March 31, 2016 &-MAR 312015 Contact Phone Number for Mr. Williams: 303 - 653 -3940 ; , :,;F RECLAMATION MINING AND SAFETY Dear Mr. Williams: This letter is in response to your letter dated February 13, 2015 in which you request renewal of the above referenced substitute water supply plan (SWSP) on behalf of Connell Resources, Inc (Applicant) in accordance with 5 37 -90- 137(11), C.R.S. to cover depletions caused by gravel mining operations at the Timnath- Connell Pit (M- 1999 -050). The required fee of $257 has been submitted (receipt no. 3668459). The most recent SWSP renewal was approved on April 21, 2014 and expires on March 31, 2015. SWSP Operation The Timnath Pit is located in Section 3, Township 6 North, Range 68 West of the 6th P.M., south of the town of Timnath and west of the Poudre River. Mining operations at the Timnath- Connell Pit during this plan period will consist of evaporation from ground water exposed at the site and dust control. The reclamation activity proposed to occur at the Timnath- Connell Pit during this plan period is limited to backfilling of previously mined areas. No additional mining of sand and gravel is proposed to occur at this site during this plan period. Replacement of depletions at the site will be made via delivery of Box Elder Ditch Company shares to an on -site recharge pond. The final reclamation plan for the site calls for a lined reservoir for the area west of the Box Elder Ditch and backfilling of the mined area to the east of the Box Elder Ditch. An 8.10 -acre recharge pond and a 2.74 -acre unlined pond will remain on the site after reclamation. Depletions There are 6.03 acres of exposed ground water at the site and an 8.10 -acre recharge pond. Ground water is exposed at the site in 0.15 acres of dewatering trenches, a 0.53 -acre dewatering sump, a 2.61 -acre pond used to provide water for dust control purposes, and a 2.74 -acre pond (Map 1). Evaporative depletions were calculated using a gross annual evaporation of 39 inches, with a credit of 10.1 inches for effective precipitation (based on an average annual precipitation for the Loveland and East Ft. Collins weather stations). Net evaporative depletions are 19.52 acre -feet per year for the 8.10 -acre recharge pond and 14.53 acre -feet per year for the remaining 6.03 acres of exposed ground water (see attached Tables 1 and 2). The evaporative loss from the recharge pond is deducted from the deliveries to the recharge pond in the given month prior to determining the net Office of the State Engineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 -866 -3581 • Fax: 303 - 866 -3589 www.watenstate.co.us