# Calvary No 81

- **MSHA mine ID:** 1512753
- **Status:** Active
- **Type / commodity:** Underground / Coal (Bituminous)
- **Location:** Leslie, KY
- **Operator:** Blue Diamond Coal Co
- **Controller:** Sev.en Global Investments a.s.
- **Public source rows linked:** 23,985
- **Source coverage:** 17 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Sev.en Global Investments a.s. (0158381) → Blue Diamond Coal Co (0134733) → Calvary No 81 (1512753)**

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

## Controller and operator valid-time history

- **Pargas Inc → River Processing Inc:** 1981-03-01 through 1983-12-20; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Coal Ridge Fuels Of Hazard Inc → River Processing Inc:** 1983-12-21 through 1985-05-27; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Consumers Coal Company → Kentucky Prince Coal Corp:** 1985-05-28 through 1986-11-19; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Amax Inc  et al → Kentucky Prince Mining Company:** 1986-11-20 through 1992-04-28; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Petrofina Oil Company et al → Kentucky Prince Mining Company:** 1986-11-20 through 1992-04-28; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Leroy  Lackey et al → Sovereign Mining Company:** 1992-04-29 through 1995-04-16; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Blue Diamond Coal Company → Blue Diamond Coal Company:** 1995-04-17 through 1999-01-27; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Charles  Collins → Calvary Coal Co. Inc:** 1999-01-28 through 2004-02-04; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **James River Coal Company → Blue Diamond Coal Co:** 2004-02-05 through 2014-09-03; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Blackhawk Mining LLC → Blue Diamond Coal Co:** 2014-09-04 through 2020-05-31; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.
- **Sev.en Global Investments a.s. → Blue Diamond Coal Co:** 2020-06-01 through current/open; derived from co-tenure at mine 1512753; source `msha-controller-operator-history`.

- History rows: 11
- Typed edges: 30
- 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 — 33 since 2021:** Accidents and injuries 183 historical accident/injury rows; 0 coded fatalities and 6,922 lost days across the published record.
2. **COMPLIANCE — 931 since 2021:** Violations and penalties 4,462 violation rows across the full record; 1,090 carry an S&S flag and $2,458,153 appears in current assessed amounts.
3. **HEALTH — 10K samples:** Occupational health samples 8,568 coal dust; 661 coal quartz; 818 noise. 0 personal-sample rows have a published C/E ratio above 1; 146 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 — 62K tons:** Quarterly production and employment 56K employee hours and 96 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2,572 linked rows:** Contests, conferences and decisions 1,233 contested-violation rows, 1,233 civil-penalty docket/decision rows, and 106 conference records linked by issuance number.
6. **CONTRACTORS — 18 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 — 87 since 2021:** Inspections 299 inspection events and 54K published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 348,428 short tons
- **Labor hours:** 311,766
- **Average employees:** 121
- **Coal supply region:** Appalachia Central
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 75.380 — Escapeways; bituminous and lignite mines.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.380
- **30 CFR 75.1107-16 — Inspection of fire suppression devices.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1107-16
- **30 CFR 75.1731 — Maintenance of belt conveyors and belt conveyor entries.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-R/section-75.1731
- **30 CFR 75.1103-5 — Automatic fire warning devices; actions and response.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-L/section-75.1103-5
- **30 CFR 75.520 — Electric equipment; switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.520
- **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 75.512 — Electric equipment; examination, testing and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.512
- **30 CFR 75.220 — Roof control plan.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.220
- **30 CFR 75.202 — Protection from falls of roof, face and ribs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-C/section-75.202

## Source coverage

- **Accident, Injuries, and Illnesses:** 183 rows; 2000-02-16 through 2026-08-19; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2020-07-14 through 2020-07-14; source ID `msha-addresses`
- **Assessed Violations:** 4,358 rows; 2000-01-07 through 2026-08-14; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1,233 rows; 2001-06-04 through 2026-07-01; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 8,568 rows; 2000-01-17 through 2026-10-08; source ID `msha-coal-dust-samples`
- **Conferences:** 106 rows; 2000-07-25 through 2024-07-22; source ID `msha-conferences`
- **Contested Violations:** 1,233 rows; 2007-02-20 through 2026-01-15; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,448 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 354 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 11 rows; 1981-03-01 through 2014-09-04; source ID `msha-controller-operator-history`
- **Inspections:** 299 rows; 2000-01-06 through 2026-10-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 205 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 44 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 818 rows; 2005-10-11 through 2026-08-06; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 661 rows; 2000-03-13 through 2026-08-06; source ID `msha-quartz-samples`
- **Violations:** 4,462 rows; 2000-01-07 through 2026-10-07; 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/calvary-no-81-1512753`
- JSON: `/api/v1/mines/calvary-no-81-1512753`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1512753/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1512753/relationships`
- MCP resource: `mine://1512753/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`