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State and Federal joint venture) manner. Creative leadership was required for <br />synthesizing technical methods and illuminating institutional approaches for <br />instream flow protection. <br />Toward this end the U.S. Fish and Wildlife Service initiated two efforts in <br />1975. First, the Western Water Allocation Project of the Office of Biological <br />Services commissioned a state-of-the-art review of currently used methods <br />determining instream flow needs. This review, for the first time, compiled <br />the contributions of struggling practitioners in this emerging specialty area <br />(Stalnaker and Arnette1976). <br />Second, the Service (Memo to Associate Director for Environment and Research, <br />August 21, 1975) provided the impetus which resulted in a December 1975, <br />decision to create the Cooperative Instream Flom Service Group (IFG) in Fort <br />Collins, Colorado. The IFG was established in July 1976, using EPA pass-thru <br />funds. The tasks and accomplishments of the IFG through fiscal years 1977 to <br />1979 is the subject of this Three-Year Report. <br />THE COOPERATIVE INSTREAM FLOW SERVICE GROUP CONCEPT ('14-'? ? <br />The conceptual basis of the IFG has two aspects. First, the Group was <br />designed to address the interrelationships among specific areas. of instream <br />flow needs: the physical component, the biological component and the <br />decision-making component.- The belief that these components should, and <br />could, be closely coordinated was to be the guiding principle of the organi- <br />zation. The physical component sets the bounds for the biological component. <br />The biological component is essential for determining actual instream <br />