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<br /> <br />=' <br /> <br />',. <br /> <br />DESILTING PLANT <br /> <br />BEOTION PAGE <br />140 General discussion nh.__n__...'nn.......... ......un........_..._.._m..... .__.n................ ...__.... 265 <br />141 Description ..._..__..._,.........____.'..__..'____...___._.._ ....n....._.............:___........ .................__.nn 266 <br />142 DeBUting basins n..............._..._.._..__................ _.....u........_..... ,,'n_o__.___.___ 266 <br />143 Rotary scrapers n.........__................ .............._..........._...n.......__..._.......h......_..hh..... 268 <br />144 Removal of silt ..........._.................. .........h....._.....n.h...........__.._huhn....h............__ 269 <br /> <br />CHAPTER XIIl-Al,L-AMERICAN CANAl, SYSTEM <br /> <br />146 Introduction __....... <br /> <br />.............................271 <br /> <br />ALL-AMERICAN CANAL <br /> <br />146 Surveys and investigations ...'n...............__..............h........._................................. 274 <br />147 Description .............................................. ........................................... ..................... 276 <br />148 Canal sections .._................. ......................... .................................................... ...... 278 <br />1'49 Construction equipment and methods ....n .. ... ......_................. 282 <br /> <br />STRUCTURES AT DRAINAGE COURSES <br /> <br />150 General discussion ..................................._........._......h........_.n................................ 285 <br />161 SIphons ...................................................................................................................... 286 <br />152 Wash overchutes _.... .....................................h.........h....._h............................-....... 288 <br />153 Drainage inlets .......... ..................._........,...,.................................. ...........,............. 290 <br /> <br />OTHER STRUCTURES <br />154 Pilot Knob check and wasteway ........._.........................._..................................... 291 <br />165 Alamo River croBsing ..............................................._......n....._................m........... 292 <br />166 New River crosBing ........................................._.._......................._......_...._............... 294 <br />167 Power drops ..._........._....................................._...................,...,.................................. 294 <br />168 Coachella Canal turnout nn..'..h...................,.............hn.'....._....h.............m._.."._.. 297 <br />