Air Shaft

USA / California / Clayton /

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This air shaft (once 150 feet deep and reached here by a short tunnel) was used to keep a coal mine ventilated and free from dangerous gasses. The marks left by miners' picks are still evident on the excavation sides.

Nearby cities:

Coordinates: 37°57'3"N 121°53'39"W

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Los Medanos Hills/Pittsburg Hills 0.9 km
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