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Black Diamond Shaft

Black Diamond Shaft

Highlight • Historical Site

Black Diamond Shaft

Mountain biking

5.0

(2)

Hiking

5.0

(1)

This Highlight is in a protected area

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Black Diamond Mines Regional Preserve

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Location: Contra Costa County, California, United States

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Sue

August 2, 2023

Hiking

This once 150 feet deep air shaft was put in place to ventilate a coal mine to keep it free from dangerous gasses. There is a short tunnel to access the interior and get a closer look. On the excavation sides, there is still evidence of marks left by the picks from miners.

Sue

January 8, 2024

Mountain biking

This once 150-foot-deep air shaft was put in place to ventilate a coal mine to keep it free from dangerous gasses. There is a short tunnel to access the interior and get a closer look. On the excavation sides, there is still evidence of marks left by the picks from miners.

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