... polythene filler squashed into joint Fig. 17. Reinforcement in diaphragm walls around cable anchorages way of a concrete trough into a tumbling bay and then on into a drainage ditch. To isolate the aqueduct for maintenance purposes, tilting stop gates were provided either side of the aqueduct. These consist...

... entrance and gate with a deeper sill designing a channel to suit the lowered sill, the characteristics of the submarine and the accompanying tugs dredging the channel and installing new and improved equipment such as navigation aids and tide gauges procuring various associated works and advice...

... belongin a period of several thousand years. the development of design changesin siphons, Mention of these points and gates and weirs over the pa1s5tyears. references has been included here merelyto emphasize sev- ThisPaper is mainlya tion of bridge openings to eral matterswhich have a review...