The reservoir brought jobs and relative prosperity to the community, with the population remaining relatively stable for the next 70 years. In 1974, ownership of the estate passed from the Liverpool Corporation to the Severn Trent Water Authority . Governance Llanwddyn has a community council which has up to seven locally elected councillors. Llanwddyn also gives its name to the Llanwddyn electoral ward which elects a councillor to Powys County Council. At the May 2017 council election Bryn Davies won Llanwddyn as Plaid Cymru's first seat on Powys Council. References External links Llanwddyn Community Council Former villages in Wales