Part of Graig Colliery & Brick Works (nprn 507795). Machine base at C19 colliery, disused in late C19. It survives in the form of 2 sets of holding-down bolts 4x2m and 4x3m, with bolts 0.2-1m high, all set into stonework, which only survives at ground level.
Recorded as part of Uplands Initiative Survey. R Hayman, H&H, 16/09/2009.