LevelItemDescriptionArchaeological Excavation report on Powerline Refurbishment at Bwlch y Ddeufan and Llannerch Fedw. Written by Carol Ryan Young of Gwynedd Archaeological Trust, October 2019. Project No. G2626. Report No. 1510. Historic Environment Record Event Primary Reference Number 45464.ArchiveGATP - Gwynedd Archaeological Trust Projects ArchiveDateArchive Number6547893