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I I I I I J I I I t I I I I I I I I I build upon effluent management and systems integration concepts previously identified in the MWSI Project. Specifically, the study will focus on the hydrology, water rights, operations, water quality and raw water storage aspects of potential actions. In the northwest geographic sub-region, a study will be conducted to define the potential additional yield that could be cooperatively developed through interconnections and cooperative use of storage facilities at one or more locations in the northwest area. Northwest water supply systems, seasonal operations for wet/average/dry years, participants' relevant water rights, and major system facilities including diversion points, canals, pipelines, reservoirs, treatment plants, principal treated water distribution lines and interconnections will be examined to identify critical linkages, capacities and bottlenecks. An operational analyses will be conducted to help identify constraints and opportunities. In conclusion, it is important to note that investigation of opportunities for the use of existing systems' infrastructure to promote maximum utilization of water resources available to the South Platte Basin above the Henderson Gage requires a high level of trust and cooperation between individual water providers and the State. The identification and investigation of the opportunities listed above has occurred as a direct result of the efforts of the members of the Technical Advisory Committee for the MWSI Project. ChaDter 7 - The Effect on Existing Water Rights of Current Recharge Technology and Practices in the Denver Basin Aquifers (Technical Addendum No.1, Chapter 6) Injection or recharge of reusable water into the Denver Basin aquifers for storage and later recovery and use has significant potential for the Denver Basin aquifers. Research by the Centennial Water and Sanitation District and the Willows Water and Sanitation District has proven that this concept works at its existing storage level, the Denver Basin has an estimated 500,000 acre feet of injection storage capacity. Impact on water rights would be minimal since the water used for recharge must be fully reusable. Furthermore, the Denver Basin Artificial Recharge Extraction Rules protect existing water rights in a number of ways. Using excess water treatment capacity of water providers during the non-irrigation season, water can be treated to drinking water standards and recharged using gravity to inject water into the Denver Basin aquifers. This ability to use surplus treatment capacity supports conjunctive use of surface water and ground water. ChaDter 8 - The Impact of De Minimis Standards for Injury Based upon an Annual Depletion Standard - 9-