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Mine detail: Longwell Ranch Central, North and South Pits
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North America
United States
California
Contra Costa
Previously called ''
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Location
Lat / long:
37.86935, -121.68936
Resource(N)
Primary:
Sand and Gravel, Construction
Ore:
Sand
Production
Operation type:
Unknown
Production size:
None
Development status:
Occurrence
Geology
References
MRDS
M007182
DEP
10029559
Reference
CALIF. JOUR. VOL. 47, NO. 4, OCT. 1951, PL. 42 & P. 608; V. 54, NO. 4, OCT. 1958, P. 581, PL.
Reporter
Gere, W.