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<br />(X)
<br />It'' CONSTRUCTION
<br />c:t"" sECTION PAGE
<br />C\! 118 Surveys. -. .' . . . . . . .. . . . . .. . .. . . . . .. . .. .. . . ., . . " . . .. . . . . . . . . .. .. .. .. 214
<br />119 Excavation..............................,.......................... 215
<br />120 Concreting ..................,...................................... 215
<br />121 Installation of ga.tes a.nd valves. . . . . . , . . . . . . . . . . . . . . . . .. . ... ... . . . .. .. 218
<br />122 Quantities and cos~................,......,......................... 221
<br />
<br />CHAPTER VIII-TUNNEL-PLUG OUTLET WORKS
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<br />123 Gtlneral description..................................,......... 223
<br />
<br />DESIGN OF STRUCTURES
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<br />124 Tunnel plugs.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 227
<br />125 Valve chambers... .. . . . . . ..... . . . . . . . . . . . . . .. .. .. .. .. . . . . . . . . . . . .. .. 229-
<br />126 Transition structures.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -. . . . . . . . . . .. 232
<br />127 Observation platforms. . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . . . . . . . . . . . . . . . . .. 234
<br />128 Air vents................... ............ .."......................... 234
<br />129 Adits to valve hOU$es........."......................... .......... .... 235
<br />
<br />VALVES AND GATES
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<br />130 Needle valves.. . .. .... .. . . . . " . . . . " . . . . . . . . . . . . . . . . " .. .. . . . . . . .. .. 236
<br />131 Emergency gates. ..... . . . . . . . . . . . . . . . . .' . . . . . . . . .. .... . . . . . , ,. . , .. .. 236
<br />132 Needle valve alinement.. . . . . . . . . . . . . . .. . . . .. . , .. ... . . . . . . .. " ,. '" . .. 236
<br />133 Operating program. .. .. . .. .. " . . , .' . .. . . . .. . . .. . .. . . . . .. .. .. . .' .. ..' 237
<br />134 Control and interlocking provisions........ ....,................... 238
<br />
<br />AUXILIARIES
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<br />135 Power supply.. .' . . . . . . . . ,.. " . . ,. . . . . . '" . ." .. .. .. . . . . .. .. ,. . . ., .. 238
<br />136 Lighting ........,.....,.........,...............".................. 239
<br />137 lJnwatering and drainage purnnps.............................. ........ 241
<br />138 Cran-es and other u.tilities.. .' . . . . . . . . .. . .. . .. . . . . .. . . . . .. .. . . . . . . . . .. 241
<br />
<br />CONSTRUCTION
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<br />139 Excavation.."....,..,.."".."",..""""""..""....,..", 242
<br />140 Concrete placement. .. . .. . . .. . . . . . . . . . . . . . . .. . '" .. . . . . . . .. .... . . .. 244
<br />141 Installa.tion of va.lves and gates.......... ....... ...,........ ~....... 245
<br />142 Grouting and drainage, , , , , , .. , ' , , , , , , .. , ' , , , , .. , .. .. ' , , , .. .. .. .. .. 246
<br />143 Cost summary, , , , ' , ..' , , , ...., .., , ' , , ..' , , .. .. , , , , , ' .. ' , .. ' , .. , ..,.. 241
<br />
<br />BULKHEAD GATES
<br />
<br />144 General description"""""""""..,.........."......"....,:" 241
<br />145 OperAting house utilities.. , .. ' .. , , ' , .. , , .. , .. , , , , , , ' , .. ' , , , , , ' , , , , ,.. 252
<br />146 Construction ..'"""",..,'..",'...."..'..'""",..'",,',..," 253
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