NPRNTeitlMath O SaflePerthynasNPRN309616TeitlElan Aqueduct: Inlet, Dulas SyphonMath O Saflen/aPerthynasAssociated withNPRN309618TeitlElan Aqueduct: Outlet, Dulas SyphonMath O Saflen/aPerthynasAssociated withNPRN95469TeitlElan Aqueduct, Elan Valley Water Scheme, Birmingham Corporation WaterworksMath O Saflen/aPerthynasPart of
