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Kim Edwards South Platte Combined Replacement Plan October 23, 2007 Page 8 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°k conveyance loss was assumed as well as a farm efficiency of 50°k. The return flow obligations, which were not addressed in the above decree, were calculated for this plan using a SDF value of 270 days and the assumption that all water diverted but not used by the crops is returned to the stream system through deep percolation. For accounting purposes the return flow requirement for the Fulton Ditch will be determined based on the calculated return flow factors. Brighton Ditch The 1.323 shares of Brighton ditch were historically used to irrigate the three farms described below: The 4/14'" share was historically used to irrigate 64.9 acres of pasture grass at the Getr Farm. Using aBlaney-Criddle analysis the potential crop consumptive use for the 64.9 acres was determined to be 106.53 acre-feet. Assuming a 30% ditch loss and 55% farm efficiency the dry year consumptive use was determined to be 44 acre-feet. The 4/6"' share was historically used to irrigate 40.4 acres at the Wattenberg Property consisting of 50% pasture grass and 50% alfalfa. Using aBlaney-Criddle analysis the potential crop consumptive use for the 40.4 acres was determined to be 73.23 acre-feet. Assuming a 30% ditch loss and 55% farm efficiency the dry year consumptive use was determined to be 72.2 acre-feet. The 0.371 shares were historically used to irrigate 72.1 acres at the Haake Property along with 5.75 shares of New Granter Ditch. The property consists of consisting of 50% pasture grass and 50% alfalfa. Using aBlaney-Criddle analysis the potential crop consumptive use for the 72.1 acres was determined to be 130.75 acre-feet. Assuming a 30% ditch loss and 55% farm efficiency the dry year consumptive use for the 0.371 Brighton ditch shares was determined to be 46.5 acre-feet. Aggregate will utilize the entire 1.323 shares for use in this plan. Westminster 1999 The 1999 conditional lease with the City of Westminster will provide 2.0 cfs of fully consumable effluent every day from November 10 to March 20 beginning on November 10, 2000. This lease has a maximum duration of eight years. Additionally, under this lease, the City, at its discretion, can make replacements at either Metro Wastewater Treatment Plant or the Big Dry Creek Waste Water Treatment Plant. The lease provides 515.70 acre-feet annually. New Brantner Ditch Aggregate sold its New Brantner shares to Todd Creek and has leased those shares back in previous years for use in this SWSP. Todd Creek is now exercising its option to terminate the lease back provisions as they prepare to take the shares to court in the coming months. Therefore, the New Brantner Ditch shares have been removed from this SWSP Old Brantner Ditch Aggregate current has use of 11 shares of Old Brantner Ditch, however they do not propose to utilize those shares in this plan. Dewatering Credit The applicant will account for the depletions and accretions to the river that result from dewatering operations. Prior to claiming any credit for the water returned to the stream system from dewatering the applicant must install adequate measuring device to measure the quantity of water being pumped for dewatering purposes.