there is a river running under the highway. it has a dam with a gate that regulates the flood water level with worm gears. it's su

there river running under highway dam gate that regulates flood water level worm gears sunny sky blue clouds sky clouds bridge catchment causeway concrete dam wall control creek drain water engineering flap lifting mechanism flood floodgate floodgates flow flowing regulate level valve gates grass hydraulic engineering structure hydro industrial industry irrigation canal melioration metal fencing overflow partition regulation river banks road rural rurally screws spillway sunny technology gear gears mechanisms