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Michelle L. Hatcher 8/13/2007 Page3 The steady state lagged mining depletions are shown in the attached Table 1. Replacements The proposed sources of replacement water are 25 shares of Fulton Ditch and fully consumable water leased from the Saint Vrain Left Hand Water Conservancy District and the City of Aurora. The Fulton Ditch water will be recharged into Zigan Reservoir which is a reclaimed gravel pit located in Section 35, Township 1 South, Range 67 West, 6"' P.M. The historic use of the 25 Fulton ditch shares yields 43.89 acre-feet of water during Aprif through October while generating 5.25 acre-feet of return flow obligation during November through March. This quantification is based on the technique used in the March 24, 1999 approval for the Fulton Lakes Pit, where the historic consumptive use values were determined using an analysis decreed in case number 82CW393. In this approach, headgate diversions were based on average monthly values for the period of 1976-1988 and a 10% conveyance loss was assumed as well as a farm efficiency of 50°~. The return flow obligations, which were not addressed in the above decree, were calculated for this plan based on the assumption that all water diverted but not used by the crops is returned to the stream system through deep percolation. The historical consumptive use and net consumptive use credit realized at the river from recharge of the Fulton Ditch shares is shown on attached Table no. 2. The plan will also account for the impacts and credits from the dewatering at the Stagecoach pit. The plan estimates that dewatering will occur for 8 hours per day, 365 days per year at a rate of 1,000 gpm. See attached Appendix D for the estimated credit and depletions from dewatering. The Applicant will lease 28.2 acre-feet of fully consumable replacement water from the Saint Vrain Left Hand Water Conservancy District ("SVLH") for November 2006 through March 2007. The point of replacement for the SVLH water will be the convergence of Saint Vrain Creek and the South Platte River. The Applicant will lease about 180 acre-feet of fully consumable replacement water from the City of Aurora (per phone call on July 19, 2007 between Ms. Michelle L. Hatcher and Bill McIntyre) for the period of November 2006 through October 2007 (includes 3.7 acre-feet for transit losses). The City of Aurora water will be released from the Metro Waste Water Treatment Plant and all replacements will account for transit losses. The total lagged mining depletions and replacements are shown on attached Table no. 3, 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 shalt be valid for the period of November 1, 2006 through October 31, 2007, unless othervvise revoked, modified, or superseded 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, 2007. 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 attached Table 3. Should the lagged depletion from any of the pits exceed