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<br />Ou2085 <br /> <br />3 <br /> <br />had no adverse effect, or had a beneficial effect, on cultural resources. Sediments were <br />redeposited along terrace margins providing a stabilizing buffer to deposits containing cultural <br />materials. Ethnobotanical resources experienced areas of scouring that promoted a later <br />renewal of vegetation. Preventative stabilization was conducted at the Goodding willow and <br />it appeared healthy during the 1996 growing season. <br /> <br />"".-,-.~ <br /> <br />Monitoring that has been conducted subsequent to the 1996 Test Flow indicates that <br />physical impacts continue at some of the monitored resource locations. Surface erosion <br />appears to be the most frequent physical impact. Bank slumpage, gullying and arroyo cutting <br />is present at resource locations where drainage systems are actively changing to achieve the <br />dam-induced, lowered river baselevel. These impacts were identified at approximately 34% of <br />the monitored sites. Ethnobotanical resources appear to be recovering and monitoring <br />continues. The Goodding willow at Granite Park has continued to be monitored as <br />continuous high flows in 1997 may have removed stabilized sediments in the root area. <br /> <br />."$. <br /> <br />c. The economic implications of conducting 1996 Test. Flows, or future, as-yet-undefined <br />"Adaptive Management Flows," primarily relate to changes in power generation. However,. <br />changing flow regimes can affect other resources, including recreational whitewater boating <br />and sport fishing which will be evaluated in future flows. Assessment of resource reports of <br />adaptive management flows to date have largely focused on evaluation of impacts on power <br />revenues. The 1996 Test Flow resulted in a loss of generation, which had to be replaced by <br />purchases to meet Western's contractual commitments to deliver power, and thus repay dam <br />operation and maintenance costs. This resulting additional cost was approximately <br />$3,900,000 <br /> <br />Final Draft - 12/12/97 - For AMWG Review <br />