# Mico Quarry

- **MSHA mine ID:** 4104711
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Medina, TX
- **Operator:** Vulcan Construction Materials, LLC
- **Controller:** Vulcan Materials Company
- **Public source rows linked:** 1,157
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Vulcan Materials Company (0071891) → Vulcan Construction Materials, LLC (L16168) → Mico Quarry (4104711)**

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

## Controller and operator valid-time history

- **Lattimore Properties Inc → Lattimore Materials Corp.:** 2008-02-15 through 2011-03-30; derived from co-tenure at mine 4104711; source `msha-controller-operator-history`.
- **Holcim Ltd → Lattimore Materials Corp.:** 2011-03-31 through 2013-05-31; derived from co-tenure at mine 4104711; source `msha-controller-operator-history`.
- **Vulcan Materials Company → Vulcan Construction Materials, LLC:** 2013-06-01 through current/open; derived from co-tenure at mine 4104711; source `msha-controller-operator-history`.
- **Legacy Vulcan Corp (Form:Vulcan Materials Co) → Vulcan Construction Materials, LLC:** 2013-06-01 through 2007-11-15; derived from co-tenure at mine 4104711; source `msha-controller-operator-history`.
- **Holcim Ltd → Lattimore Materials Corp.:** 2015-07-10 through 2013-05-31; derived from co-tenure at mine 4104711; source `msha-controller-operator-history`.
- **Amrize Ltd → Lattimore Materials Corp.:** 2025-06-23 through 2013-05-31; derived from co-tenure at mine 4104711; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 14
- Interval anomalies: 3
- 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 — 2 since 2021:** Accidents and injuries 17 historical accident/injury rows; 0 coded fatalities and 129 lost days across the published record.
2. **COMPLIANCE — 15 since 2021:** Violations and penalties 40 violation rows across the full record; 5 carry an S&S flag and $8,318 appears in current assessed amounts.
3. **HEALTH — 13 samples:** Occupational health samples 13 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 12K employee hours and 16 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 5 linked rows:** Contests, conferences and decisions 2 contested-violation rows, 2 civil-penalty docket/decision rows, and 1 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 — 12 since 2021:** Inspections 45 inspection events and 609 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 56.3401 — Examination of ground conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3401
- **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 46.5 — 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 56.12004 — 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 56.14207 — 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 56.15005 — 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 46.7 — New task training.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 17 rows; 2008-02-21 through 2025-09-29; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2014-04-01 through 2014-04-01; source ID `msha-addresses`
- **Assessed Violations:** 40 rows; 2009-03-10 through 2026-02-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 2 rows; 2018-04-13 through 2025-04-21; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2017-12-15 through 2017-12-15; source ID `msha-conferences`
- **Contested Violations:** 2 rows; 2017-05-17 through 2024-10-31; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 562 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 149 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 2008-02-15 through 2013-06-01; source ID `msha-controller-operator-history`
- **Inspections:** 45 rows; 2008-05-10 through 2026-04-30; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 221 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 57 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:** 13 rows; 2009-09-17 through 2024-06-25; source ID `msha-personal-health-samples`
- **Violations:** 40 rows; 2009-03-10 through 2026-02-17; 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/mico-quarry-4104711`
- JSON: `/api/v1/mines/mico-quarry-4104711`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4104711/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4104711/relationships`
- MCP resource: `mine://4104711/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`