NPRNTeitlMath O SaflePerthynasNPRN413072TeitlElan Aqueduct: Dolau Tunnel Observation Tower WestMath O Saflen/aPerthynasConsists ofNPRN413073TeitlElan Aqueduct: Dolau Tunnel Graig ShaftMath O Saflen/aPerthynasConsists ofNPRN413075TeitlElan Aqueduct: Dolau Tunnel Bleddfa ShaftMath O Saflen/aPerthynasConsists ofNPRN413074TeitlElan Aqueduct: Dolau Tunnel Observation Tower EastMath O Saflen/aPerthynasConsists ofNPRN95469TeitlElan Aqueduct, Elan Valley Water Scheme, Birmingham Corporation WaterworksMath O Saflen/aPerthynasPart of
