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<br /> <br />UNITED STATES <br />DEPARTMENT OF THE INTERIOR <br /> <br />. J. A. Krug, Secretary <br /> <br />BUREAU OF RECLAMATION <br /> <br /> <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 5 <br /> <br />PENSTOCKS AND OUTLET PIPES <br /> <br />