2009-04-01_HYDROLOGY - M2004078 - Laserfiche WebLink

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Richard T. Raines March 27, 2009 Page 4 Dunes Development Mann Lakes 2,800 6,700 115,000 0.2 400 4,450 45,000 0.2 Stagecoach Stop Property 200 15,000 45,000 0.2 Ft. Lupton Pit Stream Dep letion Factor of 300 days was used Lupton Lakes V ,a•_ar____ - 2,640 7,600 150,000 0.2 ^_UIJIQIIUe IIUIII WCII LU IIVU[ W-distance from the aquifer boundary through the well to the river channel T-transmissivity of the alluvial aquifer (in gallons per foot/day) between the well and the river The lagged mining depletions are shown in the attached Table 1. Replacements The proposed source of replacement water is fully consumable water leased from the City of Aurora. The Applicant has an agreement with the City of Aurora ("Aurora") whereby Aurora will continue to make releases of reusable effluent up to a maximum volume of 214.20 acre-feet for the Lafarge SWSPs. The applicant will account for a transit loss of 0.5% per mile from the Metropolitan Waste Water Treatment Plant to the gravel pit sites. The transit losses for each site are shown in the table below. For purposes of the SWSP request, an average 5% transit loss was used, which is conservative given the estimated depletions at each site. Point of Re lacement Distance From Replacement Source mi) Transit Loss From Replacement Source Howe Pit 7 3.5% Tanabe Pit 7 3.5% Dunes Development 7 3.5% Mann Lakes 8 4% Stagecoach 8 .4% Ft. Lupton Pit 19 9.5% Lupton Lakes 14 7% The total lagged mining depletions and replacements are shown on attached Table no. 2. Conditions of Approval I hereby approve this 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SWSP shall be valid for the period of November 1, 2008 through October 31, 2009, unless otherwise revoked, modified, or superceded by decree.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 per site) by August 31, 2009. 2. The total area of pond surface exposed after December 31, 1980 for each of the unlined pits shall not exceed those values listed in Table A of this approval. Should the total :surface area exposed exceed those amounts, an amendment will need to be filed with this office. The total lagged depletions resulting from operation of the pits shall not exceed those amounts specified in