NPRNTeitlMath O SaflePerthynasNPRN96459TeitlElan Valley Water Scheme, Birmingham Corporation Waterworks, Cwm ElanMath O Saflen/aPerthynasPart ofNPRN32534TeitlPen-y-Garreg Dam; Pen-y-Gareg Dam, Elan Valley Water SchemeMath O Saflen/aPerthynasAssociated with
