2014-01-28_HYDROLOGY - M2003091 - Laserfiche WebLink

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O 1p` r 18 7 6 DEPARTMENT OF NATURAL RESOURCES DIVISION OF WATER RESOURCES January 27, 2014 David Heintz or Kristina Wynne Bishop - Brogden Associates 333 West Hampden Ave., Ste 1050 Englewood, CO 80110 Re: Duckworth Substitute Water Supply Plan (WDID 0602525) Duckworth Pit, DRMS Permit No. M- 2003 -091 (WDID 0603005) Section 35, T1S, R67W, 6th P.M. Water Division 1, Water Districts 5 and 6, Adams County Approval Period: November 1, 2013 through October 31, 2014 Contact phone number for Mr. Heintz or Ms. Wynne. 303 - 806 -8952 Dear Mr. Heintz & Ms. Wynne: John W. Hickenlooper Governor Mike King Executive Director Dick Wolfe, RE Director /State Engineer RECEIVED JAN 2 8 2014 Division of Reclamation, Mining & Safety We have reviewed your letter dated October 4, 2013 requesting a substitute water _supply plan ( "SWSP ") in accordance with § 37 -90- 137(11), C.R.S., to cover depletions caused by mining op re ations at the Duckworth Pit operated by Martin Marietta Materials ( "MMM" or "Applicant ") along Boulder Creek. The required fee of $257.00 for the renewal of this substitute supply plan has been submitted (receipt no. 3662040). The SWSP was originally approved on July 20, 2005, and was most recently renewed on December 24, 2012. Plan Operation This SWSP covers depletions caused by sand and gravel mining operations at the Duckworth Pit. Mining operations commenced in November 2012 and are projected to occur in two phases over a period of four to five years. During this plan period it is expected that the exposed ground water area will vary from 0.88 acres to 1.15 acres as shown in attached Table 1. Dewatering will occur to allow for dry mining at the site. Operations that will consume water include exposing ground water, dewatering, mining and removal of product, and dust control. Replacement water will come from water stored in priority in Heaton Reservoir, dewatering credits from the Duckworth pit, changed Rural Ditch shares and excess accretions from MMM's South Platte Combined SWSP (WDID 0202581). Under this SWSP the Applicant also sought to divert changed Rural Ditch shares from Heaton Reservoir for use at the Del Camino Batch Plant and replace depletions from out -of- priority storage in Heaton Reservoir. Such operations cannot be approved under a SWSP approved pursuant to § 37 -90- 137(11), C.R.S. Therefore, prior to diverting changed Rural Ditch shares for use at the Del Comino Batch Plant, or storing water in Heaton Reservoir out of priority, the Applicant must obtain a SWSP pursuant to § 37 -92 -308 or a court approved augmentation plan. Depletions Evaporation and Mining Operations Net evaporative depletions are calculated using a gross annual evaporation of 40 inches per year per NOAA Technical Report NWS -33. This is reduced by applying a credit of 9.1 Office of the State Engineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 www.water.state.co.us