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Task 3: March through July 1996 <br />Conduct aerial reconnaissance, photography, and topographic surveys of the <br />proposed study reaches. Develop limiting factors criteria. Document habitat and <br />fish composition (if possible) at flow levels occurring during site visits. <br />Task 4: August through September 1996 <br />Conduct computer hydraulic modeling of the study reaches based on the <br />information gathered in the field. Determine range of physical parameters at a <br />range of flows representative of historic hydrologic conditions in the mid to late <br />summer. Evaluate the potential benefit of diversion structure modification, <br />possible storage releases from an enlarged Elkhead Reservoir, or acquisition of <br />senior direct flow water rights to facilitate fish passage. <br />Objective 2: <br />Task 5: August through September 1996 <br />Use hydrologic model to determine frequency and duration of threshold flow <br />condition at present and future consumptive use levels; the need, frequency and <br />duration of flows required to provide passage; and the potential storage <br />availability for augmentation flows. <br />Assess biological and population data of Colorado squawfish to determine <br />potential historic hnpacts and a characteristic range of migration periods and flow <br />ranges for the return migration period. <br />Task 6: August through September 1996 <br />Participate in discussions and field evaluations between and with the project team <br />members and other interested experts to facilitate the formulation of an opinion <br />of the range of flows required for the migration of the Colorado squawfish in the <br />Yampa River system. <br />Task 7: October through December 1996 <br />Prepare a project report including recommendations concerning the potential <br />benefit(s) to the migration of the Colorado squawfish from improvements to <br />diversion structures, releases of stored water from the proposed enlargement pool <br />in Elkhead Reservoir under various reservoir operation rules, or acquisition of <br />senior direct flow water rights. <br />Objective 3: <br />Task 1: January through March <br />Acquire radio tags and data logger detection equipment. <br />