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,CD228fJ 20,000 af of water is diverted/consumed by the thermo-electric generation plants, which makes the electric industry the second largest water consumer in the Yampa Valley, BBC also analyzed if Yampa Valley industries could adopt water conservation methods to reduce water consumption, The electric powerplants in Craig and Hayden may install new generating units, which would decrease the amount of water they use for cooling purposes, The private and municipal sector may implement water conservation measures, but the amount of water saved is small in comparison to irrigated agriculture uses, At this time, it does not appear practical for agriculture to implement water conservation measures, Finally, BBC projected the water demand for the year 2045, This projection assumes the demands will not be limited by water availability, Water diversions will range between 490,000 and 620,000 af, Water consumption will range between 140,000 and 170,000 af. Agriculture will divert between 425,000 and 540,000 af and consume between 90,000 and 115,000 af, Tables 1 and 2 give a detailed breakdown of the 2045 water demands, 5. EVALUATION OF FUTURE FLOWS As discussed previously, the CRWCD initiated a study to consider the effect of the Juniper water right on instream flows and other water uses. This initial study lead to development of a Yampa River Basin model to simulate fiows in the basin under different operational scenarios, In Phase I studies it was determined the Elkhead Reservoir enlargement was the most feasible alternative to meet short-term demands for augmenting late season fiows on critical habitat This section summarizes results of selected model runs made by Hydrosphere during studies conducted between 1991 and 1996, 5.1 Definition of Scenarios Numerous model scenarios were run using Hydrosphere's Yampa River Basin Model in connection with Phase I and Phase II planning studies completed in 1993 and 1995, respectively. Subsequent to the completion of the Phase II study, additional model scenarios were developed to further examine a variety of operation and management options ("O&M Studies"), Of the more than fifty model scenarios run over the course of these efforts, six are described below. All these model scenarios simulated storage releases from an enlarged Elkhead Reservoir. The six scenarios include: . The Phase I Studv scenario, which simulates an instream flow water right based on the contemplated draft of the Juniper Project and having a priority date of 1954, Reservoir storage releases are made to satisfy existing and future in-basin demands, some of which are called out by the 1954 instream fiow right . The Phase II Studv scenario, which simulates flow targets, based on Preliminary Flow Recommendations developed in 1994, In-basin demands are assumed to divert free from any call for in stream flows, Reservoir storage releases are then made year around to bring Maybell fiows up to the level of the targets, if they are not met otherwise, Dr;lft 07/28/99 11 Ayres Associates