HC Deb 18 June 1974 vol 875 cc141-2W
Mr. Wigley

asked the Secretary of State for Wales what is the acreage of land submerged under each water reservoir in Wales with a capacity of more than 1,000 million gallons.

Mr. John Morris

The information is not available in the form requested. The following table shows the approximate area of water surface for each reservoir in Wales with a capacity of more than 1,000 million gallons. The water surface area of the reservoirs listed is approximately 0.2 per cent. of the total area of Wales.

Reservoirs of over 1,000 mg Capacity in Wales
Name of Reservoir
Approximate area of water surface (acres)
Alaw … 1,100
Llwyn On … 150
Llandegfedd … 434
Llyn Cowlyd … 250
Talybont … 320
Llysyfran … 187
Taf fechan … 330
Usk … 320
Alwen … 400
Lake Vyrnwy … 1,380
Llyn Celyn … 830
Caban Elan Group … 500
Pen-y-Garreg … 124
Craig Goch … 217
Claerwen … 650
Clywedog … 615
Llyn Brianne … 530
Brenig (under construction) … 1,750
10,087