Montana · MSHA record
Portable Crew #3
Block Mountain Slate & Stone
- MSHA operator
- Block Mountain Slate & Stone
- Quarry / operation
- Portable Crew #3
- Location
- Plains, Montana
- Color families
- Not listed
- MSHA ID
- 2402408
- Reported status
- Intermittent · since 08/09/2012MSHA snapshot: 18 Sept 2026
- Record type
- Portable operation; physical site unconfirmed
Reported workforce
4 workers in this MSHA record
MSHA’s NO_EMPLOYEES field comes from the Mine Information Form. The snapshot is dated 18 Sept 2026; it does not give this field a reporting-period date. These are mine-record figures, not current company headcounts or proof of production.
MSHA field definitionsRegister classification
Review - likely veneer/flagstone
A research classification, separate from MSHA operating status.
Confirm before specifying
Open MSHA source datasetAsk the supplier about current availability, material range, fabrication and test data for your application. A listing or MSHA status does not establish supply readiness.
MSHA snapshot dated 18 Sept 2026. Company names identify operators, not verified parent-company ownership.