Laserfiche WebLink
Stephen Buechner, Applegate Group <br />June 8, 2011 <br />DEPLETIONS <br />Page 2 <br />You have provided a monthly breakdown of lagged depletions at this site in your attached <br />Appendix A. The stream depletion model was developed based on the following assumptions: <br />the exposed surface area is 1,250 feet from an active stream, the transmissivity is 55,000 <br />gal/day/ft, the specific yield is 0.2, and the location of the impermeable boundary is 2,400 feet <br />from the live stream. During this plan approval period, no ground water will be used for <br />reclamation, concrete batching, or any other purpose. The total consumptive use and total <br />lagged stream depletions were calculated to be 17.94 acre-feet and 16.32 acre-feet, <br />respectively, for the 2009-2010 approval period. The total consumptive use and total lagged <br />stream depletions were projected to be 18.69 acre-feet and 18.67 acre-feet, respectively, for the <br />2010-2011 approval period. <br />REPLACEMENTS <br />The proposed sources of replacement water for this pit are an annual lease of 50 acre- <br />feet per year of fully consumable water from the Board of Water Works of Pueblo (PBWW), and <br />the applicant's ownership of five shares of Twin Lakes Reservoir and Canal Company stock, <br />yielding approximately 3.5 acre-feet of water. The PBWW water will be provided at the City of <br />Pueblo wastewater treatment plant located east of Pueblo when adequate exchange potential <br />exists to make that replacement water available at the Parkdale Project site. When there is <br />insufficient exchange potential to utilize reusable effluent, the PBWW will release water from <br />upstream storage at Clear Creek Reservoir or Twin Lakes Reservoir, or the applicant may <br />release water from Twin Lakes Reservoir. Upstream reservoir releases will be subject to a 0.07 <br />percent per mile river transit loss, or approximately 6.34 percent from Clear Creek Reservoir to <br />Parkdale, and 6.55 percent from Twin Lakes to Parkdale. Front Range Aggregates also has an <br />additional backup supply for this project from a 50 acre-foot lease with the Canon City Water <br />Department that will only be used in the event that the other sources become inadequate. The <br />Canon City lease, a copy of which was provided to this office on September 12, 2008, is valid <br />until January 2035. The monthly depletions and replacement requirements are provided on the <br />attached Table 3. <br />The Parkdale Project mining operation possesses a corporate surety bond in the amount <br />of $1,174,724 held with the Division of Reclamation, Mining, and Safety. The amount is <br />available to cover the cost to line or backfill the pit in the event the operator abandons the project <br />and/or allows the dewatering operation to discontinue. <br />CONDITIONS OF APPROVAL <br />I hereby approve the proposed substitute water supply plan in accordance with §37-90- <br />137(11), C.R.S., subject to the following conditions: <br />1. This plan shall be valid through September 30, 2011 unless otherwise revoked or <br />modified. If this plan will not be made absolute by a water court action by the plan's <br />expiration date, a renewal request must be submitted to this office with the statutory fee <br />(currently $257) by August 16, 2011.