NPRN300520
Cyfeirnod MapSH47SE
Cyfeirnod GridSH4750073500
Awdurdod Unedol (Lleol)Ynys Môn
Hen SirAnglesey
CymunedLlanfihangel Ysgeifiog
Math O SafleGWEITHFEYDD GLO
CyfnodÔl-Ganoloesol
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Disgrifiad
Tyddyn Mawr was once the site of rural coal workings; aerial photography has shown an area of spoil tips, quarries and possible tramroads on this site.

RCAHMW: May 2009.