# OAK HILL MINE

- **MSHA mine ID:** 3003338
- **Status:** Intermittent
- **Type / commodity:** Surface / Wollastonite
- **Location:** Essex, NY
- **Operator:** NYCO MINERALS LLC
- **Controller:** Imerys S A
- **Public source rows linked:** 810
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Imerys S A (M11763) → NYCO MINERALS LLC (L03422) → OAK HILL MINE (3003338)**

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

## Controller and operator valid-time history

- **Fording Inc → NYCO Minerals LLC:** 2000-07-01 through 2008-03-13; derived from co-tenure at mine 3003338; source `msha-controller-operator-history`.
- **Rolling Rock Minerals Inc → NYCO Minerals LLC:** 2008-03-14 through 2012-09-13; derived from co-tenure at mine 3003338; source `msha-controller-operator-history`.
- **S & B Industrial Minerals S A → NYCO Minerals LLC:** 2012-09-14 through 2015-02-25; derived from co-tenure at mine 3003338; source `msha-controller-operator-history`.
- **Imerys S A → NYCO Minerals LLC:** 2015-02-26 through current/open; derived from co-tenure at mine 3003338; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- 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 — 1 since 2021:** Accidents and injuries 5 historical accident/injury rows; 0 coded fatalities and 69 lost days across the published record.
2. **COMPLIANCE — 14 since 2021:** Violations and penalties 35 violation rows across the full record; 7 carry an S&S flag and $5,344 appears in current assessed amounts.
3. **HEALTH — 58 samples:** Occupational health samples 58 personal. 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 2K employee hours and 5 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 — 5 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 — 12 since 2021:** Inspections 31 inspection events and 359 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 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.12018 — Identification of power switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **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 56.12028 — Testing grounding systems.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023
- **30 CFR 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2009-05-11 through 2021-09-29; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-02-24 through 2026-02-24; source ID `msha-addresses`
- **Assessed Violations:** 35 rows; 2006-10-16 through 2023-06-05; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 429 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 89 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2000-07-01 through 2000-07-01; source ID `msha-controller-operator-history`
- **Inspections:** 31 rows; 2002-09-17 through 2026-03-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 97 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 25 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:** 58 rows; 2017-03-07 through 2023-06-07; source ID `msha-personal-health-samples`
- **Violations:** 35 rows; 2006-10-16 through 2023-06-05; 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/oak-hill-mine-3003338`
- JSON: `/api/v1/mines/oak-hill-mine-3003338`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3003338/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3003338/relationships`
- MCP resource: `mine://3003338/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`