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SMITHSON VALLEY QUARRY
Cibolo Creek @ US 281, North, Bexar County, TX
MSHA ID4104108
TYPESurface
MATERIALConstruction Sand and Gravel
EMPLOYEES12
MATERIALS PRODUCED
Construction Sand and Gravel
COMPANY INFORMATION
Operator
Martin Marietta Materials Southwest LLC
Parent Company
Martin Marietta Materials Inc
Company Type
Other
DIRECTIONS
8
CONTACT
Contact information not available for unclaimed listings.
Are you the owner? Claim this listing29.837500, -98.818333
Data Source
Mine Safety and Health Administration (MSHA)
Last updated: 1/30/2026
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