# Madera Quarry, Inc.

- **MSHA mine ID:** 0405825
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Granite
- **Location:** Madera, CA
- **Operator:** Madera Quarry Inc.
- **Controller:** W (Wallace) Jaxon  Baker
- **Public source rows linked:** 224
- **Source coverage:** 12 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**W (Wallace) Jaxon  Baker (M06034) → Madera Quarry Inc. (0191373) → Madera Quarry, Inc. (0405825)**

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

## Controller and operator valid-time history

- **Jeffrey  Lessman et al → Madera Quarry LLC:** 2011-05-19 through 2023-07-04; derived from co-tenure at mine 0405825; source `msha-controller-operator-history`.
- **Paul  Cocotis et al → Madera Quarry LLC:** 2011-05-19 through 2023-07-04; derived from co-tenure at mine 0405825; source `msha-controller-operator-history`.
- **W (Wallace) Jaxon  Baker → Madera Quarry Inc.:** 2023-07-05 through current/open; derived from co-tenure at mine 0405825; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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 2 historical accident/injury rows; 0 coded fatalities and 123 lost days across the published record.
2. **COMPLIANCE — 8 since 2021:** Violations and penalties 38 violation rows across the full record; 6 carry an S&S flag and $6,489 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 12K employee hours and 20 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 12 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 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 — 2 since 2021:** Inspections 15 inspection events and 310 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 56.14107 — 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 56.23003 — Requirements for written safety program.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-T/section-56.23003
- **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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 45.4 — Independent contractor register.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-45/section-45.4
- **30 CFR 56.1000 — Notification of commencement of operations and closing of mines.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 62.120 — Action level.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-M/part-62/section-62.120
- **30 CFR 47.51 — Requirement for an MSDS.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-F/section-47.51
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2011-12-30 through 2016-02-12; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-03-03 through 2025-03-03; source ID `msha-addresses`
- **Assessed Violations:** 38 rows; 2011-10-12 through 2026-02-03; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2012-10-16 through 2012-10-16; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 6 rows; 2011-10-12 through 2011-10-12; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 2011-05-19 through 2023-07-05; source ID `msha-controller-operator-history`
- **Inspections:** 15 rows; 2011-10-12 through 2026-01-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 86 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 22 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; 2011-10-12 through 2026-02-03; source ID `msha-personal-health-samples`
- **Violations:** 38 rows; 2011-10-12 through 2026-02-03; 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/madera-quarry-inc-0405825`
- JSON: `/api/v1/mines/madera-quarry-inc-0405825`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405825/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405825/relationships`
- MCP resource: `mine://0405825/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`