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High grade surveying with a theodolite in West Mine

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Title: High grade surveying with a theodolite in West Mine

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Work on the surface at Pot Shaft. Doug is sifting material excavated from the shaft.Timbers found at the base of Pot Shaft during the excavation. Carbon dating put them as having been part of a living tree in about 75BC.Excavation in progress in Tom's Shaft
Sketch made during Tom's Shaft excavationSurveying the minesHigh grade surveying with a theodolite in West Mine
Adding detail such as passage height and width. The tape represents the line surveyed by theodoliteUsing a total station to survey in the main chamber of Alderley Edge. The distant light is a reflector placed over a survey stationUsing a total station on the surface to set up a giro on the base line at West Mine. The giro was used underground to set a base line there

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