The Culvert in Ebbw Vale is along the River Ebbw Fawr, a stretch of just over a mile of the river was Culverted in 1937 to accommodate expansion of the steel works.
The tunnel was originally a brick lined concrete arch for its entire length. In places it has raised walkways on either side, it is well documented that someone died in this Culvert from touching a live wire that some metal thieves had cut some years ago.