# Evanston Barite Mill

- **MSHA mine ID:** 4801714
- **Status:** Abandoned
- **Type / commodity:** Facility / Barite Barium Ore
- **Location:** Uinta, WY
- **Operator:** National Oilwell Varco LP
- **Controller:** National Oilwell Varco Inc
- **Public source rows linked:** 168
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**National Oilwell Varco Inc (0087815) → National Oilwell Varco LP (0103766) → Evanston Barite Mill (4801714)**

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

## Controller and operator valid-time history

- **Spirit Minerals Management LLC et al → Spirit Minerals, LP:** 2007-10-01 through 2009-07-12; derived from co-tenure at mine 4801714; source `msha-controller-operator-history`.
- **National Oilwell Varco Inc → National Oilwell Varco LP:** 2009-07-13 through current/open; derived from co-tenure at mine 4801714; source `msha-controller-operator-history`.

- History rows: 2
- Typed edges: 6
- 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 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 24 violation rows across the full record; 10 carry an S&S flag and $7,122 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 11 personal; 1 area. 6 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 105 employee hours and 2 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 — 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 25 inspection events and 369 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.5001 — Exposure limits for airborne contaminants.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-D/section-56.5001
- **30 CFR 56.13020 — Use of compressed air.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13020
- **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 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.4603 — Closure of valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4603
- **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 48.31 — Hazard training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.31
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.4500 — Heat sources.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4500

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2011-05-20 through 2011-05-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2013-10-16 through 2013-10-16; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2010-05-26 through 2010-05-26; source ID `msha-area-samples`
- **Assessed Violations:** 24 rows; 2008-01-23 through 2012-10-24; source ID `msha-assessed-violations`
- **Contractor Employment and Production — Quarterly:** 12 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 4 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 2007-10-01 through 2009-07-13; source ID `msha-controller-operator-history`
- **Inspections:** 25 rows; 2007-08-08 through 2012-10-23; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 48 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 14 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:** 11 rows; 2009-02-20 through 2012-10-24; source ID `msha-personal-health-samples`
- **Violations:** 24 rows; 2008-01-23 through 2012-10-24; 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/evanston-barite-mill-4801714`
- JSON: `/api/v1/mines/evanston-barite-mill-4801714`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4801714/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4801714/relationships`
- MCP resource: `mine://4801714/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`