# HWM # 36

- **MSHA mine ID:** 3304709
- **Status:** Abandoned
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Letcher, KY
- **Operator:** Commonwealth Mining, LLC
- **Controller:** SDC LLC; Cox Enterprises LLC
- **Public source rows linked:** 280
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**SDC LLC; Cox Enterprises LLC (0148501) → Commonwealth Mining, LLC (0109325) → HWM # 36 (3304709)**

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

## Controller and operator valid-time history

- **L C Management et al → Commonwealth Mining, LLC:** 2014-03-06 through 2018-12-31; derived from co-tenure at mine 3304709; source `msha-controller-operator-history`.
- **Cox Enterprises et al → Commonwealth Mining, LLC:** 2014-03-06 through 2018-12-31; derived from co-tenure at mine 3304709; source `msha-controller-operator-history`.
- **Cox Enterprises LLC et al → Commonwealth Mining, LLC:** 2019-01-01 through current/open; derived from co-tenure at mine 3304709; source `msha-controller-operator-history`.
- **SDC LLC et al → Commonwealth Mining, LLC:** 2019-01-01 through current/open; derived from co-tenure at mine 3304709; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 7
- 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 1 historical accident/injury rows; 0 coded fatalities and 62 lost days across the published record.
2. **COMPLIANCE — 23 since 2021:** Violations and penalties 44 violation rows across the full record; 11 carry an S&S flag and $7,453 appears in current assessed amounts.
3. **HEALTH — 101 samples:** Occupational health samples 53 coal dust; 48 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 — 4K tons:** Quarterly production and employment 437 employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 10 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 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 — 7 since 2021:** Inspections 32 inspection events and 1K 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 77.1109 — Quantity and location of firefighting equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1109
- **30 CFR 77.1104 — Accumulations of combustible materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-L/section-77.1104
- **30 CFR 77.1606 — Loading and haulage equipment; inspection and maintenance.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.1000 — Highwalls, pits and spoil banks; plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-K/section-77.1000
- **30 CFR 77.404 — Machinery and equipment; operation and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.404
- **30 CFR 77.602 — Permanent splicing of trailing cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-G/section-77.602
- **30 CFR 77.604 — Protection of trailing cables.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-G/section-77.604
- **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 77.704 — Work on high-voltage lines; deenergizing and grounding.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-H/section-77.704

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2018-03-07 through 2018-03-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-10-25 through 2022-10-25; source ID `msha-addresses`
- **Assessed Violations:** 43 rows; 2014-07-09 through 2022-06-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2020-04-02 through 2020-04-02; source ID `msha-civil-penalty-dockets-decisions`
- **Coal Dust Samples:** 53 rows; 2014-05-20 through 2022-07-12; source ID `msha-coal-dust-samples`
- **Contested Violations:** 5 rows; 2019-09-23 through 2019-09-25; source ID `msha-contested-violations`
- **Controller and Operator History:** 4 rows; 2014-03-06 through 2014-03-06; source ID `msha-controller-operator-history`
- **Inspections:** 32 rows; 2014-04-30 through 2022-05-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 34 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 9 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Noise Samples:** 48 rows; 2014-07-04 through 2022-07-12; source ID `msha-noise-samples`
- **Violations:** 44 rows; 2014-07-09 through 2022-06-10; 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/hwm-36-3304709`
- JSON: `/api/v1/mines/hwm-36-3304709`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3304709/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3304709/relationships`
- MCP resource: `mine://3304709/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`