NPRNTeitlMath O SaflePerthynasNPRN96459TeitlElan Valley Water Scheme, Birmingham Corporation Waterworks, Cwm ElanMath O Saflen/aPerthynasPart ofNPRN309539TeitlDol-y-Mynach Reservoir, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated withNPRN261432TeitlDol-y-Mynach Tunnel: Nant Gwyllt Aqueduct, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated withNPRN261172TeitlDol-y-Mynach Tunnel, North Outlet, Garreg-Ddu Reservoir, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated with
