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<br />DEPARTMENT OF THE INTERIOR <br /> <br />DONALD PAUL HODEL, Secretary <br />U.S. GEOLOGICAL SURVEY <br /> <br />Dallas l. Peck, Director <br /> <br />For additional information <br />wri te to: <br /> <br />District Chief <br />U.S. Geological Survey <br />Water Resources Division <br />Box 25046, Mail Stop 415 <br />Denver Federal Center <br />lakewood, CO 80225 <br /> <br />Copies of this report may be <br />purchased from: <br /> <br />U.S. Geological Survey <br />Books and Open-File Reports Section <br />Federal Center <br />Box 25425 <br />Denver, CO 80225 <br />