# RMC Bronson Mine

- **MSHA mine ID:** 0801323
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Polk, FL
- **Operator:** Cemex Construction Materials Florida LLC
- **Controller:** Cemex S A
- **Public source rows linked:** 193
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Cemex S A (M09149) → Cemex Construction Materials Florida LLC (0106585) → RMC Bronson Mine (0801323)**

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

## Controller and operator valid-time history

- **RMC Group PLC → RMC South Florida, Inc.:** 2003-07-10 through 2005-02-28; derived from co-tenure at mine 0801323; source `msha-controller-operator-history`.
- **Cemex S A → RMC South Florida, Inc.:** 2005-03-01 through 2005-12-31; derived from co-tenure at mine 0801323; source `msha-controller-operator-history`.
- **Cemex S A → Cemex Construction Materials LP:** 2006-01-01 through 2008-12-18; derived from co-tenure at mine 0801323; source `msha-controller-operator-history`.
- **Cemex S A → Cemex Construction Materials Florida LLC:** 2008-12-19 through current/open; derived from co-tenure at mine 0801323; 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 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 27 violation rows across the full record; 8 carry an S&S flag and $3,117 appears in current assessed amounts.
3. **HEALTH — 6 samples:** Occupational health samples 6 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 3K employee hours and 5 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 — 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 19 inspection events and 345 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 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 56.12018 — Identification of power switches.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **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 56.9300 — Berms or guardrails.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **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 56.12020 — Protection of persons at switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12020
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2004-10-08 through 2004-10-08; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2009-08-03 through 2009-08-03; source ID `msha-addresses`
- **Assessed Violations:** 26 rows; 2003-09-30 through 2008-07-01; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2004-09-17 through 2004-09-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2004-06-22 through 2004-06-22; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2004-01-20 through 2004-01-20; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 31 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 2003-07-10 through 2008-12-19; source ID `msha-controller-operator-history`
- **Inspections:** 19 rows; 2003-09-29 through 2009-04-10; 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:** 13 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:** 6 rows; 2003-09-30 through 2004-12-08; source ID `msha-personal-health-samples`
- **Violations:** 27 rows; 2003-09-30 through 2008-07-01; 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/rmc-bronson-mine-0801323`
- JSON: `/api/v1/mines/rmc-bronson-mine-0801323`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0801323/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0801323/relationships`
- MCP resource: `mine://0801323/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`