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Donald E. Frick, E.I.T. Page 5 of 12 South Platte Combined Replacement Plan November 14, 2006 Boyd 8 Freeman Ditch The 240 Boyd and Freeman Ditch shares were historically used to irrigate 85 acres of pasture grass. Using aBlaney-Griddle analysis the potential crop consumptive use for the 85 acres was determined to be 142 acre-feet. Assuming a 10% ditch loss and 55% farm efficiency the dry year consumptive use was determined to be 99.3 acre-feet. The applicant will utilize all 240 shares in this plan. Loloff Section 4 Ditch The Loloff Section 4 Ditch collects seepage and waste water in the vicinity of the Loloff Pit in the SW1/4 of the NW1/4 of Section 4, Township 5 North, Range 65 West. The Division 1 Water Court adjudicated a conditional water right for the Loloff Ditch in case no. 87CW 152 for up to 4 cfs of water with an appropriation date of March 15, 1987. The decreed uses of the Loloff Ditch include irrigation and augmentation. Using an existing flume located on the ditch, when in priority, water will be diverted into the existing lake at the Loloff Pit and used for recharge. Citv of Greelev and Tri-Districts Lease Aggregate is not proposing to use fully consumable water leased from the City of Greeley and the Tri-Districts in this plan since the replacement water is not required. However, Aggregate may use the sources in future plans to supplement the current augmentation water. St. Vrain River The SWSP request submitted by aggregate in December of 2005 proposed to use the Smith & Emmons Ditch and the Leggett Reservoir as replacement sources under this plan. The applicant's consultant has since requested that those sources be removed as replacement sources under this plan. Prior to the applicant claiming the Smith & Emmons Ditch and the Leggett Reservoir for future plans they must demonstrate that bypass structures, approved by the water commissioner, are in place to allow administration of the replacement water. Replacement Sources Total CU credit CU credit for this Ian Comments Coffin 8 Davis Ditch 328.5 328.5 100% ownershi Rural Ditch 32.9 32.9 0.67 shares rechar ed throw h Larson Pit Ci of Lon mont Lease 0.0 0.0 Annual lease if necessa Coffin & Davis Ditch The Coffin 8 Davis Ditch is currently owned by the City of Longmont (21.55%), Don Shennrood (47.55%) and Aggregate (30.99%). Pursuant to a 1999 mining lease agreement with the City of Longmont, Aggregate has the right to use their 21.55 percent of Coffin 8 Davis. Pursuant to a 1993 mining lease with Don Sherwood, Aggregate has the right to use 47.55 percent of the Coffin & Davis Ditch. Mining has permanently removed the historically irrigated area from irrigation. Assuming a 10% ditch loss and 55% farm efficiency the dry year consumptive use was determined to be 328.5 acre-feet.