# PLANT #71

- **MSHA mine ID:** 4703449
- **Status:** Intermittent
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** La Crosse, WI
- **Operator:** MILESTONE MATERIALS DIVISION OF MATHY CONST. CO.
- **Controller:** Mathy Construction Company
- **Public source rows linked:** 210
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Mathy Construction Company (M00893) → MILESTONE MATERIALS DIVISION OF MATHY CONST. CO. (L16472) → PLANT #71 (4703449)**

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

## Controller and operator valid-time history

- **Mathy Construction Company → Milestone Materials Division of Mathy Const. Co.:** 2006-04-06 through current/open; derived from co-tenure at mine 4703449; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 3 since 2021:** Violations and penalties 6 violation rows across the full record; 0 carry an S&S flag and $816 appears in current assessed amounts.
3. **HEALTH — 2 samples:** Occupational health samples 2 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 1 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 6 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 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 — 7 since 2021:** Inspections 21 inspection events and 123 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 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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 56.14100 — 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 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001

## Source coverage

- **Addresses of Record:** 1 rows; 2016-02-24 through 2016-02-24; source ID `msha-addresses`
- **Assessed Violations:** 6 rows; 2019-07-09 through 2026-08-10; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2020-12-17 through 2020-12-17; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 3 rows; 2019-07-09 through 2019-07-09; source ID `msha-contested-violations`
- **Controller and Operator History:** 1 rows; 2006-04-06 through 2006-04-06; source ID `msha-controller-operator-history`
- **Inspections:** 21 rows; 2007-07-18 through 2026-08-10; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 130 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 36 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:** 2 rows; 2026-08-11 through 2026-08-11; source ID `msha-personal-health-samples`
- **Violations:** 6 rows; 2019-07-09 through 2026-08-10; 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/plant-71-4703449`
- JSON: `/api/v1/mines/plant-71-4703449`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4703449/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4703449/relationships`
- MCP resource: `mine://4703449/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`