2006-12-12_REVISION - M1977439 - Laserfiche WebLink

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Ms. loons Comaniciu RE: Upper Poudre River SWSP Renews! September 26, 2006 Page 4 of 5 the dewatering operations at any of the sites occur during the projected term of this plan, an amendment will be submitted to the SEO with a new water balance and adequate replacements Water Balance for Water Year 2007 Table No. 5 shows the water balance of the total mining depletions and the accretion to the river from the lagged historic use credit from the 5.75 Taylor and Gill Ditch shares. There is a positive net impact to the Poudre River only during the months of June through October 2007 (Table No. 5). Table No. 5 includes a calculation for the estimated evaporation from the Taylor and Gill Ditch water briefly exposed at the rechazge site. The gross evaporation for this area is approximately 3.2 feet or 38 inches, which was used to determine the evaporative consumptive use. The estimated recharge site size is one acre. To be conservative, the plan assumes the entire surface of recharge site exposed some ditch water to evaporation during the irrigation season when water could be diverted into the rechazge site. The rechazge site does not expose groundwater. There may not be water in the rechazge site each day of the 2007 season, but these days cannot be predicted so the plan will assume the site has some gross evaporative loss throughout the season. Table No. 5 shows the estimated evaporative consumptive use from the rechazge site is approximately 2.6 acre-feet During the winter months when the historic use credit from the rechazge program is insufficient, a lease from the Tri-Districts will make the additional replacements for the depletions (Table No. 6). The Tri-Districts have water rights decreed for augmentation, which can be released during each month of the yeaz for various locations on the Poudre River as required by the Division Engineer. All releases will be coordinated with the Poudre River Water Commissioner. The total amount of replacement water required including transit losses will be 29.8 acre-feet in Water Year 2007 (Table No. 6). The previously accepted transit loss of 7.8 percent is the farthest distance to a replacement source available to the Tri-Districts. The total volume leased from the Tri-Districts is 32.1 acre-feet (Table No. 6). A copy of the lease from the Tri-Districts for Water Yeaz 2007 will be submitted to the SEO when it is received. SURROUNDING WATER RIGHTS The well permit remains valid for the mining sites and no new applications are required. The three mining sites received the following well permits: • Home Office Pit -Permit No. 42997-F • North Taft Hill Expansion Site -Permit No. 62410-F • Overland Ponds Site -Permit No. 60138-F LONG-TERM AUGMENTATION Lafazge West, Inc. has a decreed water storage application for the Home Office Pit and the North Taft Hill Expansion Site in Case No. 92CWI57. The decree includes the storage in four lined reservoirs and a junior diversion right on the north side of the Poudre River. The City of Greeley and the Tri- Districts filed a water storage application in Case No. O1CW2$1 for the Overland Ponds Site and a portion of the Home Office Pit on the south side of the Poudre River.