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<br />l <br />:> <br />,. <br />~ <br />=> <br /> <br />',I <br />i <br /> <br />J <br /> <br />UNITED STATES <br />DEPARTMEXT OF THE IKTERIOR <br /> <br />JCLIl7S .d. Kava, Secretary <br /> <br />BUREAU OF REeL.UIATIUK <br /> <br />MICHAEL W. STRAUS, Commissioner <br />WAI.KEll R. YOUSG. Chief Engiuf:'€-r <br /> <br />BOULDER CANYON PROJECT <br />FINAL REPORTS <br /> <br />PART IV-DESIGN AND CONSTRUCTION <br /> <br />Bu\letin 4 <br /> <br />CONCRETE MANUFACTURE, HANDLING, <br />AND CONTROL <br /> <br /> <br />DENvER, COLORADO <br />1V47 <br />