NPRNTeitlMath O SaflePerthynasNPRN309624TeitlElan Aqueduct: Air Valve Chamber, Clywedog SyphonMath O Saflen/aPerthynasAssociated withNPRN309623TeitlElan Aqueduct: Washout Chamber, Clywedog SyphonMath O Saflen/aPerthynasAssociated withNPRN309626TeitlElan Aqueduct: Clywedog Washout Chamber, Clywedog SyphonMath O Saflen/aPerthynasAssociated withNPRN309622TeitlElan Aqueduct: Inlet and Overflow Chamber, Clywedog SyphonMath O Saflen/aPerthynasAssociated withNPRN95469TeitlElan Aqueduct, Elan Valley Water Scheme, Birmingham Corporation WaterworksMath O Saflen/aPerthynasPart ofNPRN309625TeitlElan Aqueduct: Clywedog Aqueduct, Clywedog SyphonMath O Saflen/aPerthynasAssociated with
