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<br />002451 <br /> <br /> <br />United States Department of the Interior <br />GRAND CANYON MONITORING AND RESEARCH CENTER <br />2255 N. Gemini Dr., Room 341 <br />Flagstaff, AZ 86001-1637 <br />520 556-7094 Telephone <br />520 556-7092 Fax <br /> <br />GCMR-700 <br />PRJ-13.1O <br /> <br />June 17, 1998 <br /> <br />MEMORANDUM <br /> <br />To: <br /> <br />Adaptive Management Work Group <br /> <br />From: <br /> <br />L. David Garrett, Chief, Grand Canyon Monitoring and Research Center <br /> <br />Subject: <br /> <br />Proposed Long-Term Monitoring and Research Program for Lake Powell <br />(GC, PRJ 5.1O-AMWG, GCMRC) <br /> <br />The Adaptive Management Work Group (AMWG) at the September 1997 meeting received an <br />executive summary of the Grand Canyon Monitoring and Research Center's (GCMRC) <br />assessment of past dam operations on Lake Powell water quality. Based on the GCMRC' s <br />findings of dam operation impacts to Lake Powell water quality, the AMWG recommended <br />that the TWG and the GCMRC complete several tasks. One of the tasks is to prepare a 5-year <br />Lake Powell monitoring and research plan for theAMWG to review and approve at its July <br />1998 meeting. The tasks are as follows: <br /> <br />1. Continue the current GCMRC monitoring program for the period of October <br />1997 to October 1998. <br /> <br />2. Conduct additional assessments of existing data relating to Lake Powell and <br />release water quality, including analyses of chemical and biological data that <br />were not performed due to time and monetary constraints. <br /> <br />3. Review with the Technical Work Group, in January 1998, all existing <br />knowledge related to the effects of Glen Canyon Dam operations on the water <br />quality in Lake Powell and downstream releases. <br /> <br />4. Develop, with the Technical Work Group, objectives and information needs for <br />any future Lake Powell water quality monitoring and research programs. This <br />activity would occur in January to March 1998. <br /> <br />5. Develop for the Adaptive Management Work Group and Technical Work Group <br />approval, a proposed monitoring and research plan for any specified future Lake <br />Powell water quality monitoring programs. The draft plan would be produced <br />by June 1, 1998. <br />