# Greybull Field Project

- **MSHA mine ID:** 4801679
- **Status:** Abandoned
- **Type / commodity:** Underground / Oil Shale
- **Location:** Big Horn, WY
- **Operator:** New Era Petroleum, Inc.
- **Controller:** New Era Petroleum (Jersey) Ltd
- **Public source rows linked:** 427
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**New Era Petroleum (Jersey) Ltd (0091773) → New Era Petroleum, Inc. (0108445) → Greybull Field Project (4801679)**

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

## Controller and operator valid-time history

- **Joe  McPhie → Greybull Petroleum LLC:** 2005-08-11 through 2007-05-06; derived from co-tenure at mine 4801679; source `msha-controller-operator-history`.
- **Rich  Couilard et al → Greybull Petroleum LLC:** 2005-08-11 through 2007-05-06; derived from co-tenure at mine 4801679; source `msha-controller-operator-history`.
- **Joe  McPhie → Rock Well Petroleum (US), Inc:** 2007-05-07 through 2010-03-05; derived from co-tenure at mine 4801679; source `msha-controller-operator-history`.
- **Rich  Couilard et al → Rock Well Petroleum (US), Inc:** 2007-05-07 through 2010-03-05; derived from co-tenure at mine 4801679; source `msha-controller-operator-history`.
- **New Era Petroleum (Jersey) Ltd et al → New Era Petroleum, Inc.:** 2010-03-06 through current/open; derived from co-tenure at mine 4801679; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 11
- 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 5 historical accident/injury rows; 0 coded fatalities and 5 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 18 violation rows across the full record; 1 carry an S&S flag and $1,612 appears in current assessed amounts.
3. **HEALTH — 7 samples:** Occupational health samples 7 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 51 inspection events and 776 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 57.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12032
- **30 CFR 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 57.14132 — Horns and backup alarms for surface equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-M/section-57.14132
- **30 CFR 57.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-K/section-57.12004
- **30 CFR 57.13011 — Air receiver tanks.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-L/section-57.13011
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 57.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-C/section-57.4201
- **30 CFR 57.22202 — Main fans (I-A, I-B, I-C, II-A, III, V-A, and V-B mines).** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-T/section-57.22202
- **30 CFR 57.13021 — High-pressure hose connections.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-L/section-57.13021
- **30 CFR 57.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-57/subpart-O/section-57.16005

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2006-06-26 through 2008-01-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2016-04-15 through 2016-04-15; source ID `msha-addresses`
- **Assessed Violations:** 18 rows; 2006-01-18 through 2014-11-04; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2008-02-12 through 2008-02-12; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2007-06-25 through 2007-06-25; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 244 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 43 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2005-08-11 through 2010-03-06; source ID `msha-controller-operator-history`
- **Inspections:** 51 rows; 2005-11-07 through 2016-01-12; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 32 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:** 7 rows; 2006-04-25 through 2015-04-28; source ID `msha-personal-health-samples`
- **Violations:** 18 rows; 2006-01-18 through 2014-11-04; 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/greybull-field-project-4801679`
- JSON: `/api/v1/mines/greybull-field-project-4801679`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4801679/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4801679/relationships`
- MCP resource: `mine://4801679/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`