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Ii The accounting procedures that will allow quantification of the yields associated with these tributary rights have not been fully implemented so the reliable yields are estimated at this time. Current estimates indicate that ACWW A is entitled to consume 59.7 acre-feet of tributary groundwater per month under its senior water rights during the irrigation season. This is expected to increase to 372 acre-feet per year when all adjudicated rights are developed. Well Production Capacity ACWW A currently operates 4 non-tributary wells and 3 alluvial wells (as of February 2001). Table A-5 - ACWW A Well Characteristics No. Well Production (gpm) I Race No.1 - Alluvial 1,100 2 Race No.2 - Alluvial 1,400 3 Lloyd No.2 - Alluvial 1,200 Antonoff-Dawson 100 4 Airport No.3 - Arapahoe 475 5 A-2 - Arapahoe 600 6 Denmark- Arapahoe - Arapahoe 180 7 Loyd LFH 120 8 Denmark-LFH 260 Total Available Production 3,550 · = Rate of production capacity for alluvial and nontributary sources under dry year conditions Future Water Supply Plans ACWW A has projected future water supply needs assuming that nontributary wells must be able to meet peak day demands and annual requirements with only dry year yields being provided by the alluvial wells. It is estimated that between 2000 and 4000 acre-feet per year in additional yields are required to meet ACWW A's future needs. Additionally, replacement wells will be required to maintain flow capacity to users. No schedule for developing those replacement wells has been developed at this time. ACWW A will develop an additional 18 deep wells by year 2005 to meet near-term demands. ACWW A has also purchased decreed groundwater resources in northwest Elbert County for development and transmission into their service area. This imported groundwater will be used to reduce pumping of the 'aquifers within ACWW A's current service areas. For planning purposes, ACWW A uses an average production capacity from each of its groundwater sources in the Cherry Creek basin. These planning factors are shown in Table A-5. The development of the alluvial groundwater resources along Cherry Creek will require treatment because of the impacts of point and nonpoint sources of pollution on the hydraulically connected surface water systems. The unit cost for treatment of these sources of water is estimated as $1.5 - 2 million per million gallons of water treated daily. ACWW A estimates it will develop a treatment plant of 4 million gallons per day capacity. A major impact of this type of treatment is the high level of bypass water that is created and must be treated before discharges to limited