NPRNTitleType Of SiteArchivesImagesNPRN309541TitleGarreg-Ddu Reservoir, Elan Valley Water SchemeType Of SiteRESERVOIRArchives21Images14NPRN261690TitleCoed-y-Foel, Pill Box IIIType Of SitePILLBOXArchives2Images2NPRN752TitleGarreg-Ddu Dam, Elan Valley Water Scheme;Carreg Ddu Viaduct and Submerged DamType Of SiteDAMArchives55Images37NPRN261674TitleCoed Foel Pill BoxType Of SiteGUN EMPLACEMENTArchives2Images2NPRN270333TitleCoed-y-Foel, Pill Box IType Of SitePILLBOXArchives4Images4NPRN96459TitleElan Valley Water Scheme, Birmingham Corporation Waterworks, Cwm ElanType Of SiteWATER SUPPLY SITEArchives100Images25NPRN32527TitleElan Aqueduct: Foel Valve Tower; Garreg-Ddu Reservoir Tower, Foel TunnelType Of SiteVALVE TOWERArchives19Images14