# Warren Quarry

- **MSHA mine ID:** 2402306
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Carbon, MT
- **Operator:** Montana Limestone Company
- **Controller:** Basin Electric Power Cooperative
- **Public source rows linked:** 2,209
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Basin Electric Power Cooperative (0041523) → Montana Limestone Company (0051136) → Warren Quarry (2402306)**

Current identity source: `msha-mines`. This is a current snapshot, not a historical claim.

## Controller and operator valid-time history

- **Basin Electric Power Cooperative → Montana Limestone Company:** 2002-08-01 through current/open; derived from co-tenure at mine 2402306; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- Interval anomalies: 0
- Valid-time bounds: inclusive; date granularity; null end means open-ended in the upstream history row; not independent proof of present control.
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 3 since 2021:** Accidents and injuries 23 historical accident/injury rows; 0 coded fatalities and 683 lost days across the published record.
2. **COMPLIANCE — 17 since 2021:** Violations and penalties 133 violation rows across the full record; 23 carry an S&S flag and $17,715 appears in current assessed amounts.
3. **HEALTH — 33 samples:** Occupational health samples 33 personal. 2 personal-sample rows have a published C/E ratio above 1; 0 noise rows have an action-level or PEL dose above 100%. These are separate measures, not a silica exceedance count. Silica results and sample status are shown separately.
4. **PRODUCTION — 0 tons:** Quarterly production and employment 8K employee hours and 16 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 8 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 9 linked entities:** Contractors Contractors are linked through this mine’s violation or accident records. Their production and hours cover all their operations, so they are not included in this mine’s totals.
7. **INSPECTIONS — 13 since 2021:** Inspections 62 inspection events and 2K published inspection hours across the historical record.

## EIA annual operating context

No matched record in the 2024 EIA coal-public workbook. This may be inapplicable for a non-coal operation.

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 56.15001 — First-aid materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002
- **30 CFR 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 47.44 — Temporary, portable containers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.44
- **30 CFR 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207

## Source coverage

- **Accident, Injuries, and Illnesses:** 23 rows; 2003-11-04 through 2026-05-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2003-02-10 through 2003-02-10; source ID `msha-addresses`
- **Assessed Violations:** 133 rows; 2003-01-29 through 2025-12-16; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2009-11-18 through 2010-09-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2004-03-19 through 2004-03-19; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2008-02-28 through 2010-01-13; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,175 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 285 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 2002-08-01 through 2002-08-01; source ID `msha-controller-operator-history`
- **Inspections:** 62 rows; 2003-01-28 through 2026-08-18; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 282 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 72 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Metal and Nonmetal Personal Health Samples:** 33 rows; 2003-01-29 through 2026-08-18; source ID `msha-personal-health-samples`
- **Violations:** 133 rows; 2003-01-29 through 2025-12-16; source ID `msha-violations`

## Caveats

- This is public-record decision support, not legal advice or an official MSHA record.
- Missing data can indicate no event, publication delay, an unresolved identity, or inapplicability.
- Contractor production data is entity-level and is not attributed to this mine.

## Alternate representations

- HTML: `/mines/warren-quarry-2402306`
- JSON: `/api/v1/mines/warren-quarry-2402306`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2402306/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2402306/relationships`
- MCP resource: `mine://2402306/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`