Vermont · MSHA record

Calder

GREENSTONE SLATE COMPANY

MSHA operator: GREENSTONE SLATE COMPANY
Source name: CALDER
Quarry / operation: CALDER
Location: Poultney, Vermont
Color families: Not listed
MSHA ID: 4300801
Reported status: MSHA: Intermittent · Mine ID 4300801
MSHA record details
CALDER
Snapshot: 18 September 2026. Mine source record 4300801 · Look up this ID at MSHA · Status effective 18 November 2019
Regulatory classification; confirm current supply separately.
Mine source record
Record type: Quarry / mining operation

Reported workforce

1 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 definitions Explore Greenstone Slate / Briar Hill Quarry

Register classification

Architectural producer

Curated group: Greenstone Slate / Briar Hill Quarry (Vladyka & Hill)

A research classification, separate from MSHA operating status.

Confirm before specifying

Ask the supplier about current availability, material range, fabrication and test data for your application. A listing or MSHA status does not establish supply readiness.

Look up this mine ID at MSHA

MSHA snapshot dated 18 September 2026. Company names identify operators, not verified parent-company ownership.