NPRNTeitlMath O SaflePerthynasNPRN96459TeitlElan Valley Water Scheme, Birmingham Corporation Waterworks, Cwm ElanMath O Saflen/aPerthynasPart ofNPRN261432TeitlDol-y-Mynach Tunnel: Nant Gwyllt Aqueduct, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated withNPRN309538TeitlDol-y-Mynach Tunnel, South Entrance, Dol-y-Mynach Reservoir, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated withNPRN309541TeitlGarreg-Ddu Reservoir, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated with
