attraction

big

boats

bridge

built

canal

channel

construction

dam

electric

electrical

energy

engineering

environment

flood

gate

gateway

handle

hydraulic

hydro

hydroelectric

hydropower

industrial

industry

level

locks

lowering

mechanism

metal

modern

navigation

plant

power

raising

red

regulation

renewable

reservoir

river

rotating

round

shutter

sluice

station

structure

system

technology

turbine

valve

waterways