# Evolution

- **MSHA mine ID:** 4609577
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Grant, WV
- **Operator:** Potomac-North, Inc
- **Controller:** Justin L Simmons; Alexander J Woods
- **Public source rows linked:** 211
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Justin L Simmons; Alexander J Woods (0162541) → Potomac-North, Inc (0165314) → Evolution (4609577)**

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

## Controller and operator valid-time history

- **Curtis  Layman et al → Potomac-North, Inc:** 2019-07-23 through 2021-03-11; derived from co-tenure at mine 4609577; source `msha-controller-operator-history`.
- **Jannette  Layman et al → Potomac-North, Inc:** 2019-07-23 through 2021-03-11; derived from co-tenure at mine 4609577; source `msha-controller-operator-history`.
- **Justin L Simmons et al → Potomac-North, Inc:** 2021-03-12 through current/open; derived from co-tenure at mine 4609577; source `msha-controller-operator-history`.
- **Alexander J Woods et al → Potomac-North, Inc:** 2021-03-12 through current/open; derived from co-tenure at mine 4609577; 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 16 since 2021:** Violations and penalties 19 violation rows across the full record; 10 carry an S&S flag and $2,691 appears in current assessed amounts.
3. **HEALTH — 134 samples:** Occupational health samples 93 coal dust; 10 coal quartz; 31 noise. 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
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 — 19 since 2021:** Inspections 24 inspection events and 572 published inspection hours across the historical record.

## EIA annual operating context

- **Reporting year:** 2024
- **Production:** 81,291 short tons
- **Labor hours:** 23,378
- **Average employees:** 10
- **Coal supply region:** Appalachia Northern
- **Union code:** Not published
- **Published rows under this MSHA ID:** 1

## Recent Title 30 crosswalk

Snapshot current through 2026-08-19.

- **30 CFR 77.1605 — Loading and haulage equipment; installations.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1605
- **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 77.404 — Machinery and equipment; operation and maintenance.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.404
- **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 77.1606 — Loading and haulage equipment; inspection and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-Q/section-77.1606
- **30 CFR 77.502 — Electric equipment; examination, testing, and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502

## Source coverage

- **Addresses of Record:** 1 rows; 2026-09-01 through 2026-09-01; source ID `msha-addresses`
- **Assessed Violations:** 19 rows; 2020-06-15 through 2025-11-06; source ID `msha-assessed-violations`
- **Coal Dust Samples:** 93 rows; 2020-01-29 through 2026-07-07; source ID `msha-coal-dust-samples`
- **Controller and Operator History:** 4 rows; 2019-07-23 through 2019-07-23; source ID `msha-controller-operator-history`
- **Inspections:** 24 rows; 2019-12-03 through 2026-09-17; source ID `msha-inspections`
- **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:** 31 rows; 2020-01-29 through 2025-11-20; source ID `msha-noise-samples`
- **Quartz Samples — Coal:** 10 rows; 2020-05-13 through 2025-04-14; source ID `msha-quartz-samples`
- **Violations:** 19 rows; 2020-06-15 through 2025-11-06; 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/evolution-4609577`
- JSON: `/api/v1/mines/evolution-4609577`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4609577/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4609577/relationships`
- MCP resource: `mine://4609577/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`