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<br />..-4 <br />00 <br />~ <br />C'J <br /> <br />c <br /> <br />r <br /> <br />" <br />i, <br /> <br />UNITED STATES <br />DEPARTMENT OF THE INTERIOR <br />J. A. Krug, Secretary <br /> <br />I <br />f <br /> <br />BUREAU OF RECLAMATION <br />Michael W. Straus, Commissioner <br />Leslie N. McClellan, Chief Engineer <br /> <br />BOULDER CANYON PROJECT <br />FINAL REPORTS <br /> <br />PART IV-DESIGN AND CONSTRUCTION <br /> <br />Bulletin 6 <br /> <br />IMPERIAL DAM AND <br />DESILTING WORKS <br /> <br /> <br />DENVER, COLORADO <br />1949 <br />