2014-03-10_HYDROLOGY - M2001107 - Laserfiche WebLink

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Michelle L. Hatcher NCCI Pit #1 SWSP March 7, 2014 Page 3 of 5 Conditions of Approval I hereby approve the proposed substitute water supply plan in accordance with Section 37 -90- 137(11), C.R.S., subject to the following conditions: 1. This SWSP shall be valid for the period of January 1, 2014 through December 31, 2014, unless otherwise revoked, modified, or superceded by decree. If this plan will not be made absolute by a water court action by the plan's expiration date, a renewal request must be submitted to this office with the statutory fee by November 1, 2014. 2. Well Permit 74792 -F has been issued for this pit, and this permit remains valid. The permit covers up to 111.14 acres of exposed surface area, dewatering activities, and annual water uses of 6.2 acre -feet for dust control, 22.1 acre -feet of water lost in mined product (750,000 tons /yr), 7.4 acre -feet for concrete production, and 0.4 acre -feet of asphalt production. Actual appropriates cannot exceed these amounts and are limited to those uses specifically approved through this SWSP. 3. The total exposed ground water surface area at the NCCI Pit #1 must not exceed 8.48 acres (in the dewatering trenches and ponds) during the approval period of this SWSP resulting in an annual evaporative loss of 25.2 acre -feet. 4. The annual amount of water used at the operation shall not exceed 6.2 acre -feet for dust control and the total product mined shall not exceed 450,000 tons per year below the groundwater surface, resulting in 13.2 acre -feet of water lost with the product. 5. Total consumption at the NCCI Pit #1 Pit must not exceed the aforementioned amounts unless an amendment is made to this plan. 6. Approval of this plan is for the purposes as stated herein. Any additional uses of this water must first be approved by this office. 7. The applicant shall maintain daily records of all diversions, replacements, and the amount of water used for each particular purpose. The applicant shall provide a report of these records to the division engineer at Div1Accounting(a-)_state.co.us and to District 2 Water Commissioner at William. Schneider(a).state.co.us on a monthly basis. Submitted accounting shall conform to the Administration Protocol "Augmentation Plan Accounting, Division One — South Platter River" (attached). In addition, the applicant shall verify that entities making replacement for this SWSP are including that use on their monthly accounting submitted to this office. For the purposes of this SWSP that entity is the City of Thornton (WDID 0202611). 8. All diversions shall be measured in a manner acceptable to the division engineer. The Applicant shall install and maintain such measuring devices as required by the division engineer for operation of this SWSP. 9. Conveyance loss for delivery of augmentation water is subject to assessment and modification as determined by the division engineer. Currently 0.05% per mile conveyance loss is being accounted for in the SWSP; this is subject to change depending upon current conditions. 10. All releases of replacement water must be sufficient to cover all out of priority depletions and be made under the direction and /or approval of the water commissioner. The replacement may be aggregated to maximize beneficial use. The water commissioner and /or division engineer shall determine the rate and timing of an aggregated release.