# Green Bay Mine

- **MSHA mine ID:** 0801329
- **Status:** Active
- **Type / commodity:** Surface / Sand, Common
- **Location:** Polk, FL
- **Operator:** E R Jahna Industries Inc
- **Controller:** E R Jahna  Industries Inc
- **Public source rows linked:** 1,347
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**E R Jahna  Industries Inc (M00497) → E R Jahna Industries Inc (L00585) → Green Bay Mine (0801329)**

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

## Controller and operator valid-time history

- **E R Jahna  Industries Inc → E R Jahna Management Inc:** 2004-03-10 through 2006-11-26; derived from co-tenure at mine 0801329; source `msha-controller-operator-history`.
- **E R Jahna  Industries Inc → E R Jahna Industries Inc:** 2006-11-27 through current/open; derived from co-tenure at mine 0801329; 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 — 1 since 2021:** Accidents and injuries 21 historical accident/injury rows; 0 coded fatalities and 46 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 66 violation rows across the full record; 22 carry an S&S flag and $9,403 appears in current assessed amounts.
3. **HEALTH — 35 samples:** Occupational health samples 35 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 13K employee hours and 22 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 7 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 8 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 57 inspection events and 774 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 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.20003 — Housekeeping.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20003
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **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 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 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.4402 — Safety can use.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402
- **30 CFR 46.5 — New miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.5
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **30 CFR 46.8 — Annual refresher training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.8

## Source coverage

- **Accident, Injuries, and Illnesses:** 21 rows; 2005-06-16 through 2021-04-30; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2006-10-11 through 2006-10-11; source ID `msha-addresses`
- **Assessed Violations:** 66 rows; 2004-10-05 through 2024-07-03; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2006-08-16 through 2016-06-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2014-10-15 through 2014-10-15; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2006-03-29 through 2016-01-12; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 720 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 147 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 2 rows; 2004-03-10 through 2006-11-27; source ID `msha-controller-operator-history`
- **Inspections:** 57 rows; 2004-10-05 through 2026-08-18; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 178 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 46 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:** 35 rows; 2004-10-06 through 2024-01-31; source ID `msha-personal-health-samples`
- **Violations:** 66 rows; 2004-10-05 through 2024-07-03; 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/green-bay-mine-0801329`
- JSON: `/api/v1/mines/green-bay-mine-0801329`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0801329/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0801329/relationships`
- MCP resource: `mine://0801329/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`