Part of extraction site (NPRN 500868), a spoil heap 22 m long, 5 m wide and 1.5 m high, immediately to the south west of slate quarry (NPRN 500870). Methodology: 30 m transect survey. Positional accuracy: less than 10 m. Tolerance of accuracy: +/- 5m. K. Laws, EAS Ltd, 22/11/2007.
