How big are the plug holes in Ladybower Reservoir?
Each plug hole has a diameter of 24m (78ft) and the drop from the exit point to the floor of the tunnel below is 20m (66ft). These shaft spillways have been nicknamed bellmouth or morning glory – after the flower – spillways. Importantly, they look pretty cool too.
Are there any other reservoirs with plug holes?
Could we see a photo looking up from inside the plug hole? Absolutely, here you go. Do other reservoirs have plug holes? Yes they do – but not many. Next time you’re enjoying a visit to the Brecon Beacons in Wales, look out for one at Llyn Pontsticill Reservoir. You’ll find another near the Monticello Dam in Lake Berryessa, Napa County, California.
Why are there plug holes in Rutland reservoir?
Other reservoirs employ side channel spillways, which as the name suggests channel the water away from the side of the dam, or outlet towers, which mechanically pump water from the reservoir. You’ll find one of these at Rutland Water along with a limnological tower – used to study aquatic ecosystems within the reservoir.
Each plug hole has a diameter of 24m (78ft) and the drop from the exit point to the floor of the tunnel below is 20m (66ft). These shaft spillways have been nicknamed bellmouth or morning glory – after the flower – spillways. Importantly, they look pretty cool too.
Could we see a photo looking up from inside the plug hole? Absolutely, here you go. Do other reservoirs have plug holes? Yes they do – but not many. Next time you’re enjoying a visit to the Brecon Beacons in Wales, look out for one at Llyn Pontsticill Reservoir. You’ll find another near the Monticello Dam in Lake Berryessa, Napa County, California.
Other reservoirs employ side channel spillways, which as the name suggests channel the water away from the side of the dam, or outlet towers, which mechanically pump water from the reservoir. You’ll find one of these at Rutland Water along with a limnological tower – used to study aquatic ecosystems within the reservoir.
