Drainage System

Culvert : A simple culvert lets water flow underneath a road. Traffic can pass during a rainstorm and the road road surface remains undamaged.

Bridge and drift : Steps moderate the flow of water downhill during a flash flood.

Drain cast in situ : A drain built with all its reinforced concrete components cast on site.

Manhole : A pre-cast manhole cavity is installed.

U-Drain : A U-drain consisting of re-inforced concrete components all of which were cast off site.

Tidal control gate : Re-inforced concrete gate built entirely on site to prevent upstream salt water contamination.