Clywedog Reservoir

Construction of the dam started in 1963 and finished in 1967 after the passing of an act of Parliament, the (c. xxxi), ordering its creation to help prevent flooding of the River Severn in winter and to maintain its water levels in the summer. Local opposition was strong against the construction of the reservoir as it would result in the flooding of much of the Clywedog valley and the drowning of 615 acre of agricultural land. On top of several disruptions and protests, the construction site's overhead cableway was destroyed in a bombing on 6 March 1966, causing £30,000 in damage and delaying construction of the dam by six months. The militant Welsh nationalist organisation Mudiad Amddiffyn…