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<br />ARAPAHOE COUNTY WATER AND WASTEWATER AUTHORITY <br /> <br />ACWW A is planning an indirect potable reuse system and an expansion of its non-potable water <br />system in the effort to conserve water. The Joint Water Purification Project (JWPP) will increase <br />the Authority's water supply by extending the use of alluvial water to extinction, thus reducing <br />reliance on deep groundwater and extend the life of the nonrenewable resource. Additionally the <br />increased use of non-potable water will reduce potable water demands and thus the required <br />capacity of the new water treatment plant. <br /> <br />Joint Water Purification Project <br /> <br />There are several components of the JWPP, the Joint Water Purification Project Water <br />Treatment Plant (JWPPWTP), the alluvial recharge system, and the non-potable water <br />system. <br /> <br />ACWW A is planning to construct an alluvial recharge system as part of the JWPP. The <br />recharge system will allow ACWW A to secure their existing water supply. Treated <br />wastewater effluent would be pumped upstream of the Authority's wells that are along <br />Cherry Creel( and injected into the alluvium. The effluent would then travel through the <br />alluvium where natural purification and mixing with native water would occur before the <br />water is re-pumped by ACWW A's raw water extraction wells. Currently, treated effluent <br />from the L TCWRF that is not used for non-potable irrigation, is discharged to Cherry <br />Creel(. ACWW A however holds the water rights to use its alluvial water supply to <br />extinction. The recharge system will allow ACWW A to do this, and therefore conserve <br />the Authority's non-tributary potable water supplies. <br /> <br />Following construction of the JWPP, water will be supplied to the Authority from both <br />alluvial and non-tributary wells. Alluvial well water will be treated at the JWPPWTP <br />prior to pumping into the Authority's distribution system, while non-tributary water will <br />be chlorinated and pumped directly into the distribution system. Treatment processes at <br />the JWPPWTP were selected to provide a positive barrier, and in some cases multiple <br />barriers, to contaminants that may be in the raw water due to influence from upstream <br />dischargers and the alluvial recharge system. <br /> <br />Non-Potable Irrigation System <br /> <br />The non-potable water system will consist of a pipeline delivery system that is separate <br />from the potable water distribution system and the raw water supply system for the <br />JWPPWTP. The non-potable system will supply water for service area uses that do not <br />require potable water, generally irrigation for turf and landscape areas in new residential <br />single family properties, new and existing multi-family areas, and commercial properties. <br />The non-potable system will include the use of both raw alluvial well water and treated <br />wastewater effluent. Irrigation in residential areas will be limited to using raw alluvial <br />water. <br /> <br />The non-potable water system will reduce the required capacity of the JWPPWTP by <br />reducing the potable water demands. ACWW A is constructing the JWPPWTP as a joint <br /> <br />Richard P. Arber Associates, Inc. <br /> <br />12 <br /> <br />ACWW A05 <br />