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No. 2,486 — ButterknowleTownship of Lynesack and Softley, Durham Sheet 41 of 19thC Ordnance Map. Lat. 54° 37' 33¼", Long. 1° 50' 51¼". [ OS Grid Ref: NZ 09845 25656 (409845,525656) ] Account of Strata sunk through at the Quarry West Pit, Butterknowle Colliery, 1876 Approximate surface level 702.01 feet above sea (Ordnance datum)
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