# Plant #41

- **MSHA mine ID:** 4701834
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Sauk, WI
- **Operator:** Milestone Materials Div/Mathy Construction Co
- **Controller:** Mathy Construction Company
- **Public source rows linked:** 370
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Mathy Construction Company (M00893) → Milestone Materials Div/Mathy Construction Co (L16472) → Plant #41 (4701834)**

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

## Controller and operator valid-time history

- **Thomas D  Kraemer et al → Edward Kraemer & Sons Inc:** 1950-01-01 through 1996-07-31; derived from co-tenure at mine 4701834; source `msha-controller-operator-history`.
- **Scott  Peterson et al → Edward Kraemer & Sons Inc:** 1950-01-01 through 1996-07-31; derived from co-tenure at mine 4701834; source `msha-controller-operator-history`.
- **William J  Kraemer et al → The Kraemer Company, LLC:** 1996-08-01 through 2020-12-21; derived from co-tenure at mine 4701834; source `msha-controller-operator-history`.
- **Mathy Construction Company → Milestone Materials Div/Mathy Construction Co:** 2020-12-22 through current/open; derived from co-tenure at mine 4701834; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 10
- 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 6 historical accident/injury rows; 0 coded fatalities and 12 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 38 violation rows across the full record; 12 carry an S&S flag and $4,710 appears in current assessed amounts.
3. **HEALTH — 11 samples:** Occupational health samples 11 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 164 employee hours and 1 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 4 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 — 6 since 2021:** Inspections 36 inspection events and 425 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 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.11016 — Snow and ice on walkways and travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11016
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130
- **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 56.4101 — 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 56.4201 — Inspection.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **30 CFR 56.3200 — Correction of hazardous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3200

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2001-07-31 through 2022-09-22; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2021-02-22 through 2021-02-22; source ID `msha-addresses`
- **Assessed Violations:** 38 rows; 2002-06-03 through 2020-06-16; source ID `msha-assessed-violations`
- **Conferences:** 4 rows; 2012-06-19 through 2018-08-21; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 6 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 1 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 2020-12-22; source ID `msha-controller-operator-history`
- **Inspections:** 36 rows; 2000-03-29 through 2026-08-19; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 196 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 28 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:** 11 rows; 2004-07-14 through 2022-10-26; source ID `msha-personal-health-samples`
- **Violations:** 38 rows; 2002-06-03 through 2020-06-16; 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-41-4701834`
- JSON: `/api/v1/mines/plant-41-4701834`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4701834/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4701834/relationships`
- MCP resource: `mine://4701834/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`