2013-03-12_HYDROLOGY - M2000041 - Laserfiche WebLink

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Angela Aldred, P.E. Page 2 February 13, 2013 DEPLETIONS Well permit no. 54064 -F (ID 1406561) was obtained to expose water in this pit. Fremont Paving will continue to mine the site with an allowance to disturb up to 50 acres. The exposed ground water areas consist of 5 acres of pond area, 0.3 acre of dewatering trenches, 0.1 acre of collection area, and 0.1 acre of return trench. The total of 5.5 acres of exposed ground water will result in 19.42 acre -feet of evaporative Toss (see attached Table 1). A total of 15.33 acre -feet of water is expected to be consumed by mining operations, consisting of 14.72 acre -feet of water lost in 500,000 tons of aggregate and 0.61 acre -feet used for dust suppression (see attached Table 2). Total operations with evaporation will result in 34.75 acre -feet of consumptive use. Projected uses and consumption during the 2013 plan year are as shown in the attached Tables 1, 2, and 3. Glover Analysis data provided in the cover letter of the submittal include the following: • A distance to the river of 2,400 feet • A distance of approximately 5,000 feet to the Excelsior Ditch; i.e. the impermeable boundary • Transmissivity of 100,000 gpd /ft • Storage coefficient of 0.20 Your stream depletion analysis is also attached (see attached Table 3) providing a monthly distribution of the steam depletion. You have calculated total stream depletions to be 31.92 acre -feet for the April 1, 2013 through March 31, 2014 plan year. Post -2013 plan year depletions are projected to be 8.88 acre -feet. REPLACEMENT During April 2013 through March 2014, leased fully consumable replacement credits from the Arkansas Groundwater Users Association (AGUA), available pursuant to a 2 -year lease, will be provided to cover mining depletions. The credits will be generated through the delivery of fully consumable water available to AGUA from the Board of Water Works of Pueblo, from the City of Aurora, or from the Pueblo West Metropolitan District, to AGUA's Excelsior Recharge Ponds located immediately west of Chico Creek. The lease provides that AGUA will deliver up to 30.3 acre -feet to the Arkansas River by means of recharge ponds on the Excelsior Ditch. According to the request, a copy of the lease will be submitted under separate cover. Attached Table 4 shows the proposed accounting forms and the monthly replacement schedule for the 2013 plan year. POST PLAN DEPLETIONS Projected post plan depletions are shown at the bottom of attached Table 5. Projected post - 2013 plan year depletions are 8.88 acre -feet. AGUA has agreed to provide 8.88 acre -feet of fully consumable recharge credits from the Excelsior Ponds during the period of April 2013 through March 2014 if needed. The State and Division Engineers have reviewed the plan and the adequacy of each source of water provided for use as augmentation water, including, where necessary, the historical consumptive use of each water right, and return flows from diversion of waters imported into the Arkansas River Basin or other fully consumable waters proposed for use as augmentation water.