NPRNTeitlMath O SaflePerthynasNPRN309615TeitlElan Aqueduct: Outlet, Wye SyphonMath O Saflen/aPerthynasAssociated withNPRN309614TeitlElan Aqueduct: Washout Chamber, Wye SyphonMath O Saflen/aPerthynasAssociated withNPRN309606TeitlElan Aqueduct: Inlet and Overflow Chamber, Wye SyphonMath O Saflen/aPerthynasAssociated withNPRN95469TeitlElan Aqueduct, Elan Valley Water Scheme, Birmingham Corporation WaterworksMath O Saflen/aPerthynasPart of
