# PIERCE

- **MSHA mine ID:** 0800388
- **Status:** Abandoned
- **Type / commodity:** Facility / Phosphate Rock
- **Location:** Polk, FL
- **Operator:** Mosaic Phosphates Company
- **Controller:** Mosaic Company
- **Public source rows linked:** 111
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Mosaic Company (M10050) → Mosaic Phosphates Company (L17524) → PIERCE (0800388)**

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

## Controller and operator valid-time history

- **Williams Companies → Agrico Mining Company:** 1978-03-09 through 1987-07-31; derived from co-tenure at mine 0800388; source `msha-controller-operator-history`.
- **Phosphate Resource Partners Lp → Agrico Chemical Company:** 1987-08-01 through 1993-06-30; derived from co-tenure at mine 0800388; source `msha-controller-operator-history`.
- **Mosaic Company → Imc-Agrico:** 1993-07-01 through 2004-10-22; derived from co-tenure at mine 0800388; source `msha-controller-operator-history`.
- **Mosaic Company → Mosaic Phosphates Company:** 2004-10-23 through current/open; derived from co-tenure at mine 0800388; source `msha-controller-operator-history`.

- History rows: 4
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 8 historical accident/injury rows; 1 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 8 violation rows across the full record; 1 carry an S&S flag and $552 appears in current assessed amounts.
3. **HEALTH — 4 samples:** Occupational health samples 4 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 29K employee hours and 58 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 — 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 — 0 since 2021:** Inspections 19 inspection events and 256 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 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.16006 — Protection of gas cylinder valves.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 48.28 — Annual refresher training of miners; minimum courses of instruction; hours of instruction.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-B/section-48.28
- **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 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 8 rows; 2000-08-28 through 2004-12-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2005-08-01 through 2005-08-01; source ID `msha-addresses`
- **Assessed Violations:** 8 rows; 2000-04-18 through 2003-12-04; source ID `msha-assessed-violations`
- **Controller and Operator History:** 4 rows; 1978-03-09 through 2004-10-23; source ID `msha-controller-operator-history`
- **Inspections:** 19 rows; 2000-02-10 through 2005-07-27; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 46 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 12 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:** 4 rows; 2002-02-06 through 2002-02-06; source ID `msha-personal-health-samples`
- **Violations:** 8 rows; 2000-04-18 through 2003-12-04; 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/pierce-0800388`
- JSON: `/api/v1/mines/pierce-0800388`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0800388/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0800388/relationships`
- MCP resource: `mine://0800388/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`