2014-10-21_HYDROLOGY - M1997054 - Laserfiche WebLink

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Stephen Buechner, Applegate Group Page 3 October 20, 2014 and the total lagged stream depletions were calculated to be 32.12 acre-feet for the 2014-2015 approval period. SITE DEWATERING The Applicant began dewatering the Parkdale Pit in 2012 to assist in the mining of material below the groundwater table. The water is removed from the ground and placed into a series of dewatering trenches. This water will be eventually piped and then discharged into the Arkansas River on the south side of the property boundary. The Applicant will monitor the dewatering operations and include the data in their monthly accounting submittals to the State Engineer's Office. REPLACEMENTS The proposed sources of replacement water for this pit are an annual lease of 50 acre- feet per year of fully consumable water from the Board of Water Works of Pueblo ("PBWW"), valid through April 1, 2016, and the applicant's ownership of five shares of Twin Lakes Reservoir and Canal Company stock, yielding approximately 3.5 acre-feet of water. The PBWW water will be provided at the City of Pueblo wastewater treatment plant located east of Pueblo when adequate exchange potential exists to make that replacement water available at the Parkdale Project site. When there is insufficient exchange potential to utilize reusable effluent, the PBWW will release water from upstream storage at Twin Lakes Reservoir. Upstream reservoir releases will be subject to a 0.07 percent per mile river transit loss, which equates to approximately 6.55 percent from Twin Lakes to Parkdale. Front Range Aggregates also has an additional backup supply for this project from a 50 acre-foot lease with the Canon City Water Department that will only be used in the event that the other sources become inadequate. The Canon City lease, a copy of which was provided to this office on September 12, 2008, is valid until January 2035. The monthly depletions and replacement requirements are provided on the attached Table 3. 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 SWSP shall be valid for the period of October 1, 2014 through September 30, 2015, unless otherwise revoked, modified, or superceded by decree.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 (currently $257) by August 17, 2014. 2. The annual consumptive use of water at the operation shall not exceed 33.81 acre-feet, as shown on the attached Table 2, being 11.28 acre-feet of evaporation resulting from exposure of no more than 4 acres of ground water, 8.8 acre-feet for dust control and 13.66 acre-feet lost with 540,531 tons of mined product (387,415 tons of washed aggregate and 153,116 tons of unwashed material). 3. Total consumption at the Parkdale Project site must not exceed the aforementioned amounts unless an amendment is made to this plan. 4. Well permit no. 67722-F was issued on November 24, 2008 in accordance with §37-90-