# White Bear Mica Plant

- **MSHA mine ID:** 3901158
- **Status:** Abandoned
- **Type / commodity:** Facility / Mica
- **Location:** Custer, SD
- **Operator:** Pacer Minerals, LLC
- **Controller:** Berg Family Investments, LLC; BDG, LLC; Steve  Burns
- **Public source rows linked:** 1,144
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Berg Family Investments, LLC; BDG, LLC; Steve  Burns (0146841) → Pacer Minerals, LLC (0162733) → White Bear Mica Plant (3901158)**

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

## Controller and operator valid-time history

- **Julie  Oswald et al → Pacer Corporation:** 1979-01-01 through 2016-02-18; derived from co-tenure at mine 3901158; source `msha-controller-operator-history`.
- **Steve  Burns et al → Pacer Corporation:** 2016-02-19 through 2017-12-31; derived from co-tenure at mine 3901158; source `msha-controller-operator-history`.
- **Steve  Burns et al → Pacer Minerals, LLC:** 2018-01-01 through current/open; derived from co-tenure at mine 3901158; source `msha-controller-operator-history`.
- **BDG, LLC et al → Pacer Minerals, LLC:** 2018-01-01 through current/open; derived from co-tenure at mine 3901158; source `msha-controller-operator-history`.
- **Berg Family Investments, LLC et al → Pacer Minerals, LLC:** 2018-01-01 through current/open; derived from co-tenure at mine 3901158; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 10
- 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 — 2 since 2021:** Accidents and injuries 21 historical accident/injury rows; 0 coded fatalities and 304 lost days across the published record.
2. **COMPLIANCE — 35 since 2021:** Violations and penalties 197 violation rows across the full record; 56 carry an S&S flag and $45,226 appears in current assessed amounts.
3. **HEALTH — 78 samples:** Occupational health samples 74 personal; 4 area. 17 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 4K employee hours and 9 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 17 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 civil-penalty docket/decision rows, and 5 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 — 10 since 2021:** Inspections 86 inspection events and 1K 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 56.14107 — Moving machine parts.** (6 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **30 CFR 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 21 rows; 2000-10-26 through 2021-11-09; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-02-19 through 2025-02-19; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 4 rows; 2008-04-17 through 2008-04-17; source ID `msha-area-samples`
- **Assessed Violations:** 196 rows; 2000-07-24 through 2023-05-02; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2018-04-23 through 2018-04-23; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 5 rows; 2019-12-06 through 2020-06-02; source ID `msha-conferences`
- **Contested Violations:** 6 rows; 2017-10-24 through 2017-10-30; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 373 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 96 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1979-01-01 through 2018-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 86 rows; 2000-07-24 through 2024-09-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 49 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:** 74 rows; 2003-09-04 through 2023-05-03; source ID `msha-personal-health-samples`
- **Violations:** 197 rows; 2000-07-24 through 2023-05-02; 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/white-bear-mica-plant-3901158`
- JSON: `/api/v1/mines/white-bear-mica-plant-3901158`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3901158/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3901158/relationships`
- MCP resource: `mine://3901158/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`