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No. 35 — Backworth B PitTownship of Backworth, Northumberland Sheet 81 of 19thC Ordnance Map. Lat. 55° 03' 15", Long. 1° 31' 43". [ OS Grid Ref: NZ 30110 73406 (430110,573406) ] Account of Strata bored through from the High Main Seam, Backworth Colliery, at a point in the Workings N. 6° E., 47 chains from B Pit Approximate surface level 150 feet above sea (Ordnance datum)
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