| Feature Name: | Coal Mine Tunnels
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| Feature Type: | tunnel
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| State: | California
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| County: | Contra Costa
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| County Population: | 948816
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| County Housing Units: | 354577
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| County Size: | 719.95 Square Miles
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| Latitude: | 37.94139
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| Longitude: | -121.81306
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| Map Cell Name: | Antioch South
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| Geographic Keywords: | Coal,
Tunnels
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