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<br />Summary of Sand Bar Studies <br /> <br />~Marble Canyon Sand Bar Areas (above <br />20,000 cfs) Decreased by 22% Since 1991 <br /> <br />~7 Independent Sources of Monitoring Data <br />Show Declining Sand in Marble Canyon <br /> <br />~ 1996 and 1997 Sand Bar Responses to <br />Restoration Flows Were Short Lived <br />