Columbia Quarry
MSHA Mine ID: 2700232
Material Type
Dimension Stone NEC
Mine Type
Surface
Classification Confidence
95% (HIGH)
Location Status
VERIFIED
Operator Information
Operator
Rock Of Ages Corp
Controller
Polycor Inc
Location
County: Coos
State: NH
Country: US
Data Source
US_MSHA
Snapshot: 2026-01-30
Classification: vv1
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