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<br />t":l <br />t:) <br />"" <br />N <br /> <br />o <br /> <br />....,.~ <br />~. .\ <br /> <br />.>to" <br /> <br />CONTENTS <br /> <br />3 <br /> <br />FORMS <br /> <br />SECTION <br /> <br />PAGE <br /> <br />55 General............................................................ 120 <br />56 Tunnel lining.............,......................................... 120 <br />57 Boulder Dam...... . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 126 <br />58 Spillways ..............,.....................,..................... 128 <br />59 Intake towers............... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 129 <br />60 Powerhouse ........................................................ 130 <br />61 Outlet-va.lve houses.. . .. . . ... .. . . . . . . . . .. . . . . . . .. .. .. . . . . . . . . . 131 <br />t12 Tunnel plugs................ .... .................. ...... 131 <br /> <br />PLACING EQUIPMENT <br /> <br />63 Vibrators ..".."."". _ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 131 <br />64 Pneumatic guns..........................................,..... 134 <br />65 Concrete pumps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . " . . . . . . ... . . .. 135 <br /> <br />CHAPTER V-PLACING, CURING, COOLING, <br />AND GROUTING <br /> <br />66 Introduction <br /> <br />.."'" 139 <br /> <br />PLACING PROCEDURE <br /> <br />61 Diversion tunnel lining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14-0 <br />68 Boulder Dam.. . .. . .. . . . . .. . .. . ..... . .. .. . . . . . . .. .. ,. . . . . .. .. . .. ... .. 143 <br />69 Spillways .......................................................... 153 <br />70 Inclined spillway tunnels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . ,. 156 <br />71 Intake towers........,...,.....".,........,.......,................ 157 <br />72 Powerhouse ......;................................................. 160 <br />73 Outlet-valve houses..........,.........................."............ 162 <br />74 Penstock tunnels................................ .. .. . . . . . . ... . . . ., .. 164 <br />75 Tunnel plugs.,..,., ,__... __. __.... __ __ __ ".. ...,., __ __.... __ __...,.. 167 <br /> <br />TREATMENT AFTER PLACING <br /> <br />76 Curing concrete. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . .. 170 <br />77 Cooling concrete................................. ........ ............ 171 <br />78 Grouting contracting joints... ........... .... .. ..........,......... ... 176 <br />70 Contraction control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 178 <br /> <br />CONSTRUCTION PROGRESS <br /> <br />80 General....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 180 <br />81 Records..............,.....,.................................. .". ... 181 <br />A2~~.........................................................1~ <br /> <br />1 <br />~ <br />