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Mine detail: Longwell Ranch
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North America
United States
California
Contra Costa
Previously called ''
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Location
Lat / long:
37.86931, -121.68933
Resource(N)
Primary:
Sand and Gravel, Construction
Production
Operation type:
Surface
Development status:
Past Producer
Geology
References
MAS
60130056
DEP
10278214
Reference
{Deposit:: CALIF. JOUR. V. 47, NO.4, OCT. 1951, PL.42, P.608; V.54, NO}{Deposit:: 1958, P.581, PL. 5.}
Reporter
Western Field Operations Center (WFOC)