3S 



IXPEX. 



Conclusions as to rise of river bed. 98 



Concrete locks (also see Locks, concrete). 163. 315 



monolithic, i;j 

 Conditions to be fulfilled by movable dams, 2 1 1 



in ojK-n rivers, 41 

 Conduct of work. 331 

 Congress must authorize expenditures, 5 

 ruction, bank protection, 71 

 bridges. 342 

 dikes. 64 



fixed dams, 201-205 

 levees. 85 

 locks, 155-160 

 wharvi-s. 342 



Continuing contract system, 6 

 Coping, ITI 

 Coppe, H., bank icvctment, 70 



levee sections. ;<j 

 Cord, use of in sounding. 25 

 Corps of Engineers, administration by, 5 

 Cost of concrete locks, 173 

 fixed dams. 207 

 >;ates for locks, 193 

 levees, 98 

 needle dams, 226 

 Poses dam, 250 

 wicket dams, 240 

 Creation of obstructions, 342 

 Crests of weirs, profile for overflow, 31 

 Crevasses in levees, 93 

 Cribs. 160. 326 

 Current, meters for velocity, 36 



rates of. in rivers, 51 

 Curtain dams. 244 

 Curves. Parker Ix-ar trap, 266 

 Cylindrical valves, 197 



Dalhausen. dam at, 110 

 Dams, A-frame. Thomas, 254 

 bear-trap, Lang, 263 



old, 263 

 Parker, 262 

 bridge, Taveniier, 247 

 curtain, Cam6r6, 244 

 Dalhausen, no 



drum, Desfontaines, Chittenden, 259 

 fixed, 199 

 gate, BouU?, 241 

 La Mulatiere, 231 

 Louisa, Ky., 219 

 masonry. 207 

 movable, 208 

 needle, Poire, 217 

 Poses, 247 

 shutter, Girard, 254 



Thcnard, 252 

 Ternay and Bcver, 1 1 o 

 wicket, Chanoine. 227 

 Datum for zero of gauges. 39 

 D'Aulmisson anil Downing'* formula, ,14 

 De Mas. F. B., author "Rivieres a Courant Libre," 56 

 Deposits of refuse, 343 

 Depth on sills of locks, 136 

 Description of A-frame dam, 254 

 bear- trap dam, 262 

 drum dam, 259 

 lock, 146 



movable dam, 208 

 stationary dam, 199 

 wicket dam, 227-240 

 Desfontaines, drum-weir, 259 

 Design of locks, 144 



metal lock gates, 184 

 .Movable clams. 210 



Details of construction, fixed dams, 201 

 locks, 155 

 lock gates, 181 



Diagonals on lock gates, 188 



strain in, 180 

 Dikes, closing, 65 



,truct nm. 64 



longitudinal, 



mati-rials of OOOBtniCtiaiX, 63 



Ohio River, 60 

 sections, 64 

 spur, 59 



submerged spurs. 60 

 Dimensions of trestles and needles, 225 

 Bouli- gates, 241 

 Cami-re curtains, 254 

 wickets. 229, 240 



Discharge curves based on Ba/iu's formula, 32 

 free, 29 



in open channels, 33 

 over weii 



submerged, 30. 33 

 through culverts, 198 

 Double floats for measuring velocity, 35 

 locks, 138 



sheathing, lock gates, 188 

 Drainage of levee basins. 94 

 Drains lie-hind locks, 158 

 Dredges and dredging, 44 

 clam-shell. 45 

 combination, 45 

 dipper, 44 

 elevator, 45 



for improved rivers, 48 

 hydraulic, 46 

 operations 47 

 rock, 46 



Drift-chutes in movable dams, 215 

 Drum dams, 259 

 valves. 197 



Dn Buat's experiments, 10 

 Dwelling, lock-tender's. 298 

 Lynamite, removing liars with, 48 

 snags with, 49 



Kads jetties, i -<) 



K fleets of storage on Moods, 108 



Etlicicncy of levees. 97 



Electric recording, floats, 35 



Elevator dredge. 45 



Ellct. ('has . Jr.. advocate of storage, 101 



Embankment specifications, 310 



End reactions in lock gates, 179 



Engels, Prof., conclusions on regulation, 52 



Establishment of ha'bor line. 343 



Examinations, preliminary, 16 



Examples of natural reservoirs, 104 



Excavation specifications, 310 



Expedients for improving open rivers, 41 



Expenditures to be authorized by Congress. 5 



Experiments of Rafter and Williams, discharge, 29 



Facing for concrete walls, 171 



Failure of levees, causes of, Sc) 



Farguc. Insp. (len.. on rcgulurization, 53-55 



Fence specifications, 304 



Finish of walls, 163 



Fixed dams, r 



alignment, 199 



Cost, JO? 



design. 200 



details of construction, 201 



length. 199 



methods of putting in, 203-205 

 Floats for velocity, 35 

 Floods, 13 



of Mississippi, 118 

 Floors of locks, 155 

 Foreign levees, 98 

 Formation of bars, 13, us 



