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<br />C"'J <br />~ <br />In <br />C'J <br /> <br />c <br /> <br />UNITED 5TA TES <br />DEPAR1MENT OF THE INTERIOR <br />J. A. Krug, Secretary <br /> <br />BUREAU OF RECLAMATION <br /> <br />Michael W. Straus, Commissioner <br />Leslie N. McClellan. Chief Engineer <br /> <br />BOULDER CANYON PROJECT <br />FINAL R,EPORTS <br /> <br />PART VI-HYDRAULIC INVESTIGATIONS <br /> <br />Bulletin 4 <br /> <br />MODEL STUDIES OF IMPERIAL DAM, <br />DESILTING WORKS, ALL-AMERICAN <br />CANAL STRUCTURES <br /> <br /> <br />DENVER, COLORADO <br />1949 <br />