The crest of the uncontrolled spillway is and is approximately long. When full, flood flows spill over the crest and down an concrete chute. The water then returns to the river via an open rock cascade which gradually widens to at river level. Once Dartmouth Reservoir reaches 99% capacity, it is considered to be 'operationally full'. Releases are then set to pass inflows downstream to prevent the level rising further.
The crest of the uncontrolled spillway is and is approximately long. When full, flood flows spill over the crest and down an concrete chute. The water then returns to the river via an open rock cascade which gradually widens to at river level. Once Dartmouth Reservoir reaches 99% capacity, it is considered to be 'operationally full'. Releases are then set to pass inflows downstream to prevent the level rising further.