# Dianne Mine

- **MSHA mine ID:** 3605708
- **Status:** Abandoned and Sealed
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Armstrong, PA
- **Operator:** Canterbury Coal Company
- **Controller:** Robert E  Murray
- **Public source rows linked:** 1,500
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Robert E  Murray (C13408) → Canterbury Coal Company (P20158) → Dianne Mine (3605708)**

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

## Controller and operator valid-time history

- **Canterra Coal Inc → Canterbury Coal Company:** 1975-06-01 through 1989-03-09; derived from co-tenure at mine 3605708; source `msha-controller-operator-history`.
- **Robert E  Murray → Canterbury Coal Company:** 1989-03-10 through current/open; derived from co-tenure at mine 3605708; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 — 0 since 2021:** Accidents and injuries 38 historical accident/injury rows; 0 coded fatalities and 833 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 161 violation rows across the full record; 63 carry an S&S flag and $30,573 appears in current assessed amounts.
3. **HEALTH — 229 samples:** Occupational health samples 182 coal dust; 32 coal quartz; 15 noise. 0 personal-sample rows have a published C/E ratio above 1; 4 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 62 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 3 civil-penalty docket/decision rows, and 59 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 — 0 since 2021:** Inspections 86 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 75.1711 — Sealing of mines.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1711
- **30 CFR 75.1103-11 — Tests of fire hydrants and fire hose; record of tests.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1103-11
- **30 CFR 75.400 — Accumulation of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.400
- **30 CFR 75.904 — Identification of circuit breakers.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-J/section-75.904
- **30 CFR 75.1103-1 — Automatic fire sensors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1103-1
- **30 CFR 75.333 — Ventilation controls.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.333
- **30 CFR 75.380 — Escapeways; bituminous and lignite mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.380
- **30 CFR 77.205 — Travelways at surface installations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-C/section-77.205
- **30 CFR 75.518 — Electric equipment and circuits; overload and short circuit protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.518
- **30 CFR 75.1725 — Machinery and equipment; operation and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1725
- **30 CFR 75.523-2 — Deenergization of self-propelled electric face equipment; performance requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.523-2

## Source coverage

- **Accident, Injuries, and Illnesses:** 38 rows; 2000-01-12 through 2000-08-02; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2005-05-17 through 2005-05-17; source ID `msha-addresses`
- **Assessed Violations:** 160 rows; 2000-01-05 through 2005-05-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2001-07-17 through 2001-07-17; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 182 rows; 2000-01-08 through 2000-10-23; source ID `msha-coal-dust-samples`
- **Conferences:** 59 rows; 2000-02-24 through 2000-05-05; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 546 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 136 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 1975-06-01 through 1989-03-10; source ID `msha-controller-operator-history`
- **Inspections:** 86 rows; 2000-01-03 through 2005-04-05; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 74 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 4 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 15 rows; 2000-04-06 through 2000-04-26; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 32 rows; 2000-01-08 through 2000-07-11; source ID `msha-quartz-samples`
- **Violations:** 161 rows; 2000-01-05 through 2005-05-13; 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/dianne-mine-3605708`
- JSON: `/api/v1/mines/dianne-mine-3605708`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3605708/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3605708/relationships`
- MCP resource: `mine://3605708/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`