2011-08-09_HYDROLOGY - M1987049 - Laserfiche WebLink

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Page 4 of 8 Jeffrey Clark August 8, 2011 The Applicant's Fulton Ditch shares are either delivered directly to the South Platte River or stored and released later, depending upon the season. The shares will be delivered down either the lateral (Erger Lateral) that historically served the Bromley Lakes site or either of the City of Brighton's ( "Brighton ") Fulton Ditch augmentation stations (Midland or 124 Avenue). RMCC will measure the delivery of the shares through the Erger's Lateral prior to release to the river for replacement of depletions or to storage. Brighton will measure the Fulton Ditch deliveries at these augmentation stations and account from RMCC's deliveries separately. RMCC is still in the process of finalizing an agreement with Brighton for the delivery of the Fulton Ditch shares through the augmentation stations listed above. A copy of the finalized agreement must be submitted to the State Engineer's Office once obtained. The historical consumptive use credit of Fulton Ditch shares is based on 1.76 acre -feet per share as determined in the South Adams County Water and Sanitation District ( "SACWSD ") change case engineering report prepared for Division 1 Water Court case no. 2001 CW258. The 70 shares would yield a total consumptive use yield of 123.2 acre -feet. You have proposed to calculate the historical consumptive use replacement credit from the shares as the lesser of 1.76 acre -feet per share (distributed monthly based on the SACWSD engineering report) or the total Fulton Ditch deliveries multiplied by the monthly consumptive use factors, calculated as 1 minus the summertime return flow factors presented in the SACWSD engineering report. The distribution of the average historical consumptive use of the Fulton Ditch shares is shown in Column 14 of the attached Table 1B. The historic yield of these Fulton Ditch shares will exceed the depletions in August 2011 and August 2012, and July 2013, and will require replacement of historic return flows in the winter months of November through March. The excess yield from the Fulton shares will be placed into storage in Kenneth Mitchell Lake for later release to the river during the fall and winter months, as shown in Table 1 B. RMCC has obtained an agreement with the City of Brighton to store up to 200 acre -feet of water in Kenneth Mitchell Lake. Additional replacement requirements will be met by water that RMCC already has in storage. Releases from storage for replacement purposes are shown in Table 1B, column 18. The RMCC portion of evaporation from Kenneth Mitchell Lake was estimated based upon conservative storage projection provided by the City of Brighton. RMCC has also obtained a lease from the City of Brighton for up to 250 acre -feet of water per year through December 2012. Deliveries will be made to the downstream calling right from Kenneth Mitchell Lake, 124 Avenue Storage Reservoir or at either their Midland or 124 Ave Fulton Ditch augmentation stations. The lease water projected to be used under this plan is 89.5 acre -feet for year 1, and 183.1 acre -feet for year 2, as shown in column 20 of Table 1 B. RMCC plans to renew their current lease to provide for replacement deliveries through December 2013. A copy of the lease renewal must be submitted to the State Engineer's Office once obtained. In addition to the replacement sources listed above, RMCC is also requesting that water stored under its Erger Pipeline junior water right decreed in case no. 1998CW257 be allowed to be used for augmentation of the mining depletions at the sites included in this SWSP. The Erger Pipeline has an appropriation date of April 15, 1998 and would only be available for diversion when in priority and with prior approval of the water commissioner. The monthly lagged depletions and replacement requirements for the Bromley Lakes site and North Tower pit are shown on the attached Table 1 B.