EngineeringWaterCodeStudiesSP (2)

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4 Conclusions 1. Planned utilization of 10 to IS percent of the available groundwater storage capacity in the alluvium is reasonably attainable. Use of the ground- water storage capacity can provide more efficient utilization of the total resources of the Basin, reduce shortages, and minimize conflicts between water users. This planned utilization in conjunction with surface water supplies would basically involve a heavier draft upon the groundwater supplies during low runoff years with provision for replenishment of those supplies during years of surplus runoff. 2. To achieve more optimum distribution of water supplies and accomplish desired goals, certain surface water rights should be served from groundwater sources during low runoff periods. Such operations would allow more surface water to be diverted in the upper regions, making greater re-use of return flows possible. 3. Since the groundwater in storage adjacent to the main stem of the South Platte River is currently being used to support the flowing stream, and many users are dependent upon and have rights in the return flow which joins the River via the groundwater system, provisions must be made to pro- tect these rights and to supply them with alternate sources of water to insure the continued utilization of the groundwater supply. The cost of providing such facilities should be borne by those who benefit. 4. Optimum use of water resources within the South Platte Basin can- not be achieved without control of nonbeneficial uses or waste of water. S. Integrated management of groundwater and surface water can be best achieved on an overall South Platte River Basin basis. Recommendations 1. It is recommended that legislation should be passed which will allow and encourage the integrated mangement and administration of ground- water and surface water in the South Platte Basin. It is recommended that this be accomplished through the establishment of basin water management districts. The districts should be given specific powers to own and operate well fields, reservoirs, and other facilities. 2. It is recommended that the State Engineer be granted the authority to review and overrule the operational plans of these water management districts and any agreements which may be made. The State Egnineer should continue to have the authority necessary to insure that all vested rights in the Basin are protected. 3. It is also recommended that the State Engineer should have the authority to define waste and beneficial use under the various circumstances and uses and be required to restrict diversions of water not being used bene- ficially. Water rights should be quantified in terms of acre-feet on the basis of beneficial use. ~.'