2011-03-30_HYDROLOGY - M1978056 (2)

Home Browse Search

Cheryl Signs, P.E. Kurtz Pit, DRMS-1999-006 Page 4 water decreed in case no. 2001 CW274. The attached Tables 2A and 2B show the reservoirs operations over the next two years. The average ground water contribution and direct and indirect precipitation for the two pits has been included' in the study. The Applicant intends to exchange the junior water for some of the Rural Ditch water that had previously been stored in the 112 Reservoir. Thus, the replacements for depletions at Kurtz Pit will be satisfied by delivery of junior water decreed in case no. 2001 CW274 and previously stored in the 112 and Dakolios Reservoirs. Delivery of augmentation water to the Saint Vrain Creek is subject to transit losses as determined by the water commissioner and the division engineer. Although not proposed to be used in this plan, additional replacements for depletions if necessary could be made by releases of a portion of four shares in the Rural Ditch Company water that is stored in the 112 and Dakolios lined pits. The Rural Ditch Company four shares were historically used to irrigate 158.9 acres on the 112-parcel site and these shares were used in the previous plans. Consumptive use credits from the 4 shares of the Rural Ditch that are not used to replace depletions during the irrigation season will be stored in the 112 Reservoir and subsequently released to replace non-irrigation season depletions. An application for a change of water right (to allow the applicant's Rural Ditch shares to be used in addition to irrigation for augmentation, replacement, exchange, commercial, industrial, recreational, piscatorial, wildlife propagation and storage) and approval of a plan for augmentation was filed with the Water Court in Case No. 2003CW306. The historical consumptive use of the four shares of the Rural Ditch water averages 265.50 acre-feet per year. Excess consumptive use credits from the four shares of Rural Ditch stored in the 112 Reservoir will also be released to replace non-irrigation season depletions for the Durham Pit and Everist's Lohmann Pit, Rinn Valley Pit, Firestone Pit, Fort Lupton Pit and Lupton Meadows Pit. The monthly depletions and replacement requirements are found on the attached Table 1. Conditions of Approval I hereby approve the proposed substitute water supply plan in accordance with §37-90-137(11), C.R.S. subject to the following conditions- 1 . This plan is approved with the effective date of November 1, 2010 and shall be valid through October 31, 2012 unless otherwise revoked or modified. If this plan is not decreed in water court by the plan's expiration date, a renewal request must be submitted to this office with the statutory fee of $257 no later than September 15, 2012. 2. Well permit no. 74385-F, was obtained for the current use and exposed pond surface area of the gravel pit pond in accordance with §37-90-137(2) and (11), C.R.S. 3. The total surface area of the groundwater exposed at the Kurtz site must not exceed 173.1 acres CK dewatering ceases), which results in a maximum evaporative annual loss of 235.42 acre-feet. 4. The annual water used for dust control at the Kurtz Pit shall not exceed 3.36 acre-feet and the total product mined at the Kurtz Pit site shall not exceed 700,000 tons per year, which results in 20.60 acre-feet of water lost with the mined aggregate. 5. Total consumption at the Kurtz Pit must not exceed these aforementioned amounts unless an amendment is made to this plan. 6. For the currently exposed surface area the evaporation depletions shall be calculated based on the gross evaporation minus the effective precipitation. Information regarding the depth to the gr+a??nd water table at this location must be provided to this office at the time that the