# CASTLE ROCK

- **MSHA mine ID:** 2402222
- **Status:** Intermittent
- **Type / commodity:** Surface / Dimension Slate
- **Location:** Flathead, MT
- **Operator:** Montana Rockworks Inc.
- **Controller:** Brad  Mercord
- **Public source rows linked:** 272
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Brad  Mercord (0192760) → Montana Rockworks Inc. (0083324) → CASTLE ROCK (2402222)**

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

## Controller and operator valid-time history

- **Brad  Mercord et al → Montana Rockworks LLP:** 2001-06-01 through 2007-09-13; derived from co-tenure at mine 2402222; source `msha-controller-operator-history`.
- **Bill  Carter et al → Montana Rockworks LLP:** 2001-06-01 through 2007-09-13; derived from co-tenure at mine 2402222; source `msha-controller-operator-history`.
- **Brad  Mercord et al → Montana Rockworks Inc.:** 2007-09-14 through 2023-01-06; derived from co-tenure at mine 2402222; source `msha-controller-operator-history`.
- **Bill  Carter et al → Montana Rockworks Inc.:** 2007-09-14 through 2023-01-06; derived from co-tenure at mine 2402222; source `msha-controller-operator-history`.
- **Brad  Mercord → Montana Rockworks Inc.:** 2023-01-07 through current/open; derived from co-tenure at mine 2402222; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 10
- 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: 2026-10-18T09:31:49.615908+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 7 since 2021:** Violations and penalties 23 violation rows across the full record; 5 carry an S&S flag and $5,236 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 10 personal; 1 area. 0 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 423 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 8 since 2021:** Inspections 34 inspection events and 376 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 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 41.11 — Notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.11
- **30 CFR 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.13012 — Compressor air intakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13012
- **30 CFR 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.4203 — Extinguisher recharging or replacement.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4203
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **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 56.16003 — Storage of hazardous materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16003

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2003-09-09 through 2016-08-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-05-12 through 2025-05-12; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2014-06-19 through 2014-06-19; source ID `msha-area-samples`
- **Assessed Violations:** 23 rows; 2002-06-25 through 2025-07-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2014-01-10 through 2014-01-10; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 2 rows; 2013-06-04 through 2013-06-04; source ID `msha-contested-violations`
- **Controller and Operator History:** 5 rows; 2001-06-01 through 2007-09-14; source ID `msha-controller-operator-history`
- **Inspections:** 34 rows; 2002-06-25 through 2026-05-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 137 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 30 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:** 10 rows; 2002-06-26 through 2026-05-13; source ID `msha-personal-health-samples`
- **Violations:** 23 rows; 2002-06-25 through 2025-07-10; 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/castle-rock-2402222`
- JSON: `/api/v1/mines/castle-rock-2402222`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2402222/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2402222/relationships`
- MCP resource: `mine://2402222/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`