HYDRO20414 - Laserfiche WebLink

Home Browse Search

Michelle Austin April 25, 2006 Page 2 schedule to the Arkansas River, as presented in your Table 3. The total lagged depletions for this plan year are 59.61 acre-feet. No mining or dewatering will take place during this plan year unless an amendment to this plan is approved. The previous plan was approved through March 31, 2006 with a requirement that the net unreplaced depletions for the plan year of 37.26 acre-feet be replaced. Of that amount, 9.15 acre-feet remain unreplaced. You propose that the remaining unreplaced depletions will be replaced through the excess 6.07 acre-feet of LAVWCD water available in water year 2006 and subsequent water years until the unreplaced depletions are completely replaced. Your analysis shows that 21.65 acre-feet of depletions from the Active Pit will accrue to the river after the expiration date of this plan. The analysis for the Old Aggregate Sales Areas from the prior years submittal shows that about 5.13 acre-feet of post plan depletions will accrue to the river from this pond. Therefore, the total combined post plan depletions are approximately 26.78 acres-feet. REPLACEMENTS The source of replacement water is the Lower Arkansas Valley Water Conservancy District, and a 5-year lease agreement has been submitted as verification to this office. The terms of the lease are 99 shares of Twin Lakes water per year, commencing April 1, 2005. You have considered transit losses of 10% from Twin Lakes Reservoir to Pueblo Reservoir and 0.25 percent per mile for 18 miles to the Rich Pit. The total transit loss is 9.5 acre-feet. You estimate that the shares will provide in excess of 75.2 acre-feet per year of replacement water and will therefore be sufficient to replace depletions associated with the Rich Pit and transit losses, which total 75.2 acre-feet. The source of renewable long-term replacement water sufficient to cover evaporative depletions has not been secured for this plan. Lafarge West, Inc maintains a bond with the Division of Minerals and Geology for reclamation of the site, but the bond is not of sufficient amount to backfill the excavations to a level above the ground water table. Lafarge West, Inc. is negotiating with the-City of Aurora~and Aurora•has filed amendments to Case~Nos. 99CW 169•° ~• ~ "~ and 99CW 170 to include the Rich Pit for water storage. You state that if Aurora purchases this site, then Aurora will provide the long-term commitment of water supply from its Arkansas Basin water rights. Aurora intends to construct a slurry wall liner and use the pit as a reservoir. 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: This plan shall be valid through March 31, 2007 unless otherwise revoked or modified. 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 $217) by February 15, 2007. 2. The exposed ground water surface areas, consumption of water, and river depletions due to operation of this plan may not exceed those listed in Tables 1, 2, and 3, unless an amendment is approved in advance by this office. Documentation of pond size may be required by the Division Engineer in the form of an aerial photo evaluation or survey by a