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Prepared by Evan Stafford for American Whitewater <br />CK Consulting <br />417 E Plum St. <br />Fort Collins, CO 80524 <br />970.420.5377 <br />Nathan Fey <br />American Whitewater <br />Colorado Stewardship Director <br />970.708.5181 <br />Upper Colorado River Survey 2007 <br />Description of Work and Estimated Costs <br />1. Description of Basic Analysis <br />1. Instream flow impact acceptability curves describing minimum, optimum, and <br />maximum acceptable flow and the range of acceptable flows for each river <br />segment surveyed (11 segments surveyed in Upper Colorado River Basin). <br />Example Figure 1 <br />Impact Acceptability Curve for Upper Crooked River, Washington, USA <br />3 <br />2 <br />1 <br />O <br />-1 <br />2 <br />3 <br />Optimum <br />2400 cfs <br />Minimum Maximum <br />1400 cfs ?? cfs <br />Range of Tolerable Flows <br />1400 - 4600cfs <br />50 200 400 800 1200 iG00 2000 2400 3000 3500 4GOD <br />wow I.cvd (G3+S) <br />M \ <br />`r -?'p?