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<br />~ <br />00 <br />..,. <br />N <br /> <br />c <br /> <br />CONTENTS <br /> <br />xur <br /> <br />PILE DRIVING <br />&dron P~4 <br />146 Concrete piles_____ _______________ - - ___ ----------------------- 185 <br />147 Steel sheet-piling__________________________ ------------------- 186 <br />148 Timber sheet-piling____________ __________________ ---------- --- 187 <br />149 Timber bearing piles__________________________________________ 187 <br /> <br />COMPACTED EMBANKMENTS <br /> <br />150 BOITowpl~______________________________________________---- 188 <br />151 Prepara.tion of subgrade_______________________________________ 189 <br />152 Transportation and spreading__________________________________ 190 <br />153 Compaction of materiaL _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - - - - - - 190 <br />154 Quantities______________________________________________----- 191 <br /> <br />ROCK PROTECTIVE WORK <br /> <br />155 Pit-rungravel____________________________________________---- 192 <br />156 Dry-rock paving___________________ ____ _______________________ 193 <br />157 Rock on canalslopes__________________________________________ 193 <br />158 Rock dikes__ _ __ ______.._________________________ ------------- 194 <br />159 Riprap________________________________________________------ 194 <br /> <br />CONCRETE <br /> <br />160 Cement________________________________________________----- 19a <br />161 Aggregates _ __________________________________ _______________ 198 <br />162 Mixing plan~_____________________ ________________ ______ ----- 202 <br />163 Transportation of concrete______________________________,.______ 208 <br />164 Preparation of founda.tions_ _ _ _ ___ __________ __ ____ _____________ 210 <br />165 Formo__________________________________________________----- 210 <br />166 Joints__ __ __ ___ __ _ _ _ ____ __ __ _ _ _ _ _ _ _ _ __ _ _ _ _ __ _ _ _ _ _ _ - - - - - - - -- -- 212 <br />167 Placing concrete______________________________________________ 213 <br />168 Finishing and curing__________________________________________ 217 <br />169 Concrete control and investigations_____________________________ 217 <br /> <br />PRESSURE GROUTING <br /> <br />170 Grout curtains_ _ ______________ ________________ _______________ 225 <br />171 Grouting California. abutment__________________________________ 226 <br />172 Grouting Arizona end_________________________________________ 226 <br /> <br />FABRICATED METALWORK <br /> <br />173 Revolving scrapers_ _ _ _ _______________________________________ 227 <br />174 Sludge-disposal piping_______ _________________________________ - 227 <br />175 High-pressure water system____________________________________ 227 <br />176 Roller gates_______________________ ____ ________ __ __ ____ _______ 229 <br />177 Radial g.tes_ _____________ __ ______ __ __ ______ ____ _____________ 230 <br />178 Fixed-wheel gates_ __ _ _______________ ______ __ __ ___ ____________ 231 <br />179 Gate hoi.~_________________ __ ____ ________ __ ______ ____ _______ 231 <br />180 Service and maintenan0e bridges_______________________________ 232 <br />181 Trash racks___ _ _________ ________ __ _ _______ __ _________________ 237 <br />182 Trash-rack rakes___ ________________________ ____ _______________ 237 <br />183 IIandrails_______________________________________________----- 239 <br />184 Sump pumps________ __ __________ ____ ______ ____ _______________ 239 <br />185 Weights of metalwork_________________________________________ 239 <br />