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5363 Available Water Rights -) Table 8-1 lists the adjudicated non-tributary groundwater rights available to Castle Pines North. Table B-1 - Castle Pines North Water Rights Classification Aquifer Source Annual Appropriation (ac-ft/yr) Nontributary Dawson 693 Denver 1,462 Arapahoe ],724 Laramie-Fox Hills 696 Total 4,575 In addition, Castle Pines North can develop return flows from non-tributary groundwater sources Conservation Castle Pines North is a member of the Plum Creek Wastewater Authori!)' (PCWA) and is participating in the development of a regional reuse project that will deliver treated effluent from Plant #] on Plum Creek for use on the Ridge Golf Course and open space areas. Under future conditions, it has been estimated that 828 acre-feet per year of effluent from Castle Pines North will be availab]e from Plant #1 and that 275 acre-feet per year of outdoor demands could be met by delivering the treated effluent in a new pipeline along Daniel's Park Road. At this time Castle Pines North is developing a lawn irrigation return flow recapture program by constructing weirs in local drainages with alluvial wells recovering flows for subsequent reuse in outdoor areas. J In addition to the development of a nonpotable reuse system, the District promotes conservation through an increasing block rate structure, landscaping guidelines and compliance with the low flow plumbing appliances specified by the Unifonn Plumbing Code. Water Levels Castle Pines North has been monitoring water levels in production wells since at least 1984. A complete history of water levels for each of the wells is included with the well inventory. The average rate of decline in static water levels for the Arapahoe wells based on 16 years of data is 36 feet per year. Wells A-], A-2 and A-3 averaged drops in static water levels of 31 feet per year. Heavy use of Well A-4C during year 2001 resulted in both the static water level and the pumping water leve] operating below the top ofthe aquifer during the middle of the summer. This well experiences the greatest rate of decline at 5] feet per year for the period from 1996 through 2001. Well A-7's static water level is at the top of the Arapahoe fonnation and the district will closely monitor well production capacity to establish whether there are declines in deliveries, well efficiencies and water level recovery with protracted operation under unconfined conditions. The District's A-I Arapahoe well has seen a static water level decline from an elevation of 5330 feet in 1984 to elevation 4950 feet in 2000. Pumping water level declines of250 feet are seen when this well is pumped at an average 300 gallons per minute. Figure B-2 illustrates the water level declines that have been measured in the A-] Arapahoe well over the last 15 years. At this )1