# Carroll Hollow Mine - **MSHA mine ID:** 3304495 - **Status:** Abandoned and Sealed - **Type / commodity:** Underground / Coal (Bituminous) - **Location:** Carroll, OH - **Operator:** Sterling Mining Corporation - **Controller:** W Thomas Mackall - **Public source rows linked:** 785 - **Source coverage:** 12 / 20 - **Generated:** 2026-10-17T06:17:15.228Z ## Current entity hierarchy **W Thomas Mackall (C00082) → Sterling Mining Corporation (P21337) → Carroll Hollow Mine (3304495)** Current identity source: `msha-mines`. This is a current snapshot, not a historical claim. ## Controller and operator valid-time history - **W Thomas Mackall et al → Sterling Mining Corporation:** 2002-02-04 through current/open; derived from co-tenure at mine 3304495; 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: 2026-10-17T05:35:58.500035+00:00. ## Assessment signals 1. **SAFETY — 0 since 2021:** Accidents and injuries 23 historical accident/injury rows; 0 coded fatalities and 99 lost days across the published record. 2. **COMPLIANCE — 0 since 2021:** Violations and penalties 123 violation rows across the full record; 46 carry an S&S flag and $15,280 appears in current assessed amounts. 3. **HEALTH — 447 samples:** Occupational health samples 394 coal dust; 23 coal quartz; 30 noise. 0 personal-sample rows have a published C/E ratio above 1; 6 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 — 31K tons:** Quarterly production and employment 8K employee hours and 16 summed average employees across reported subunits in the latest published quarter. 5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 — 0 since 2021:** Inspections 54 inspection events and 3K 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 75.403 — Maintenance of incombustible content of rock dust.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-E/section-75.403 - **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 75.503 — Permissible electric face equipment; maintenance.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.503 - **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 77.400 — Mechanical equipment guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.400 - **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 - **30 CFR 75.364 — Weekly examination.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-D/section-75.364 - **30 CFR 75.517 — Power wires and cables; insulation and protection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-75/subpart-F/section-75.517 ## Source coverage - **Accident, Injuries, and Illnesses:** 23 rows; 2004-07-14 through 2008-05-22; source ID `msha-accidents` - **Addresses of Record:** 1 rows; 2008-06-24 through 2008-06-24; source ID `msha-addresses` - **Assessed Violations:** 121 rows; 2002-07-22 through 2008-03-19; source ID `msha-assessed-violations` - **Coal Dust Samples:** 394 rows; 2002-10-04 through 2008-05-09; source ID `msha-coal-dust-samples` - **Controller and Operator History:** 1 rows; 2002-02-04 through 2002-02-04; source ID `msha-controller-operator-history` - **Inspections:** 54 rows; 2002-04-23 through 2008-07-17; source ID `msha-inspections` - **Mine Employment and Production — Quarterly:** 5 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:** 30 rows; 2003-06-30 through 2007-11-20; source ID `msha-noise-samples` - **Quartz Samples — Coal:** 23 rows; 2003-03-04 through 2008-03-19; source ID `msha-quartz-samples` - **Violations:** 123 rows; 2002-07-22 through 2008-05-07; 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/carroll-hollow-mine-3304495` - JSON: `/api/v1/mines/carroll-hollow-mine-3304495` - Silica records, units, sample status and quarterly means: `/api/v1/mines/3304495/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows) - Relationship JSON: `/api/v1/mines/3304495/relationships` - MCP resource: `mine://3304495/assessment` - Complete Title 30 corpus: `/data/title30-sections.json`