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No. 2,533 — ChopwellTownship of Chopwell, Durham Sheet 5 of 19thC Ordnance Map. Lat. 54° 55' 28", Long. 1° 47' 50". [ OS Grid Ref: NZ 12994 58890 (412994,558890) ] Account of Strata sunk through in the Furnace Pit at Heavy Gate, Garesfield Colliery, from the Stone Coal Seam to the Brockwell Seam, 1869 Approximate surface level 650 feet above sea (Ordnance datum)
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