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~ . Parker Water and Sanitation District November 19-20, 2001 Agenda Item 21a. DI'1dilltil~lil~;leJ""'.'!'\_~ Water RiQhts The District owns a variety of water rights for which the Rueter-Hess Reservoir becomes a key management tool. . Surface water may be diverted from Cherry Creek and Newlin Gulch under a 1985 priority date. . Ground water may be pumped from the Cherry Creek aquifer under a1985 priority date. . Ground water may also be pumped from the Cherry Creek aquifer under priority dates ranging from 1877 through 1955, associated with 10 ditches converted to well rights. . Finally, ground water may be pumped from the Cherry Creek aquifer in accordance with a 1991 augmentation plan. Effluent from the Advanced Wastewater Treatment of water originating from (non-tributary) deep wells owned by the District is exchanged for that pumped from the Cherry Creek aquifer. Water will be delivered to the Rueter-Hess ReseNoir through a 48-inch raw water transmission pipeline, or, in the case of native flow form Newlin Gulch, through the existing stream channel. (Note: The PWSD has acquired agricultural land with water rights on the lower South Platte, in former water district 64. Water rights from this property may be needed to make up depletions for the Rueter-Hess project. The costs associated with this land purchase are not being financed by this CWCB loan.) Proiect Description A number of alternatives were analyzed in the feasibility study, with 3 primary alternative as follows. 1. No Action 2. Construction of a dam at the Castlewood Canyon dam site 3. Construction of a dam at the Newlin Gulch dam site Alternative 2, Construction of a dam at the Castle wood Canyon dam site, was ruled out in 1993 when the Colorado Supreme Court denied the District's right to acquire the site for construction of a dam. Alternative 3, Construction of a dam at the Newlin Gulch dam site, consists of the Rueter-Hess ReseNoir, raw water transmission lines, and facilities to divert water from Cherry Creek. This alternative, after rigorous evaluation by the District, is considered the preferred alternative. The no-action alternative was considered unacceptable since it would mean that the District would continue to rely on nonrenewable ground water from Denver Basin wells, at ever increasing capitol and operational costs. Selected Alternative 3 consists of construction of the Rueter-Hess ReseNoir ($35 million), a 48-inch raVJ vfater transmission pipeline ($9.2 million), and the Cherry' Creek ravv vvater _ pump plant ($17.5 million). It also includes purchase of the land the reseNoirwill be built on ($8 million), and construction of the effluent pipeline, effluent reservoir, and pump station ($13.8 million). 2