NPRNTeitlMath O SaflePerthynasNPRN96459TeitlElan Valley Water Scheme, Birmingham Corporation Waterworks, Cwm ElanMath O Saflen/aPerthynasPart ofNPRN309537TeitlPen-y-Garreg Reservoir, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated withNPRN261210TeitlPen-y-Garreg Dam Valve Tower, Elan Valley Water SchemeMath O Saflen/aPerthynasConsists of
