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<br />( <br /> <br />-:-:. <br />t=> <br /><"":l <br />v) <br />......1 <br />~ <br /> <br />quality data would be collected for one to two <br />years unless the information collected indicated <br />the need for further evaluation of water quality in <br />the tailwaters. <br /> <br />Standardized pressure count and creel census data <br />would also be collected to evaluate the effect of <br />the reoperation of Navajo Dam on angler ~se. The <br />data would also be used to supplement population <br />estimate. Angler use and catch surveys would <br />continue through the remaining six years of <br />proposed research. <br /> <br />Contractual studies on trout habitat and <br />reproduction and the macroinvertebrate populations <br />in the tailwater reach have not yet been refined <br />and may ultimately be conducted internally by the <br />cooperating agencies. However, these studies will <br />focus on the response of trout populations to the <br />different experimental flow regimes proposed for <br />Navajo Dam. <br /> <br />CATEGORY - WATER OUALITY <br /> <br />Status: <br /> <br />( <br /> <br />Lead Agency: <br /> <br />Task: <br /> <br />Timeline: <br /> <br />Objectives: <br /> <br />L <br /> <br />New investigation <br /> <br />Bureau of Reclamation, Upper Colorado regional <br />office <br /> <br />Characterize water quality in the San Juan River <br />basin. <br /> <br />Identify critical water quality issues which may <br />affect recovery of endangered.fish in the San Juan <br />River basin. <br /> <br />Coordinate objectives and research efforts of the <br />San Juan Seven Year Research Plan with other on <br />going and planned water quality investigations in <br />the San Juan River basin. <br /> <br />Initial review of water quality would be conducted <br />during Phase II in FY 1992. Water quality <br />investigations and coordination with other projects <br />and agencies would continue for the duration of the <br />research program. <br /> <br />Summarize water quality data available for the San <br />Juan River <br /> <br />Analyze available water quality information and <br />identify critical water quality issues which may <br /> <br />17 <br />