# HOGAN QUARRY

- **MSHA mine ID:** 0404819
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** Calaveras, CA
- **Operator:** Foothill Materials, Inc.
- **Controller:** Estate of Robert Jones
- **Public source rows linked:** 881
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Estate of Robert Jones (0111741) → Foothill Materials, Inc. (L12863) → HOGAN QUARRY (0404819)**

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

## Controller and operator valid-time history

- **Al Johnson Construction Company → Claude C Wood Company:** 1986-07-01 through 1992-09-21; derived from co-tenure at mine 0404819; source `msha-controller-operator-history`.
- **Robert  Jones → Foothill Materials, Inc.:** 1992-09-22 through 2014-01-07; derived from co-tenure at mine 0404819; source `msha-controller-operator-history`.
- **Estate of Robert Jones → Foothill Materials, Inc.:** 2014-01-08 through current/open; derived from co-tenure at mine 0404819; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 8
- 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 5 historical accident/injury rows; 0 coded fatalities and 1 lost days across the published record.
2. **COMPLIANCE — 7 since 2021:** Violations and penalties 71 violation rows across the full record; 11 carry an S&S flag and $8,016 appears in current assessed amounts.
3. **HEALTH — 19 samples:** Occupational health samples 19 personal. 2 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 4K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 33 linked rows:** Contests, conferences and decisions 14 contested-violation rows, 16 civil-penalty docket/decision rows, and 3 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 18 since 2021:** Inspections 68 inspection events and 842 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 56.14132 — 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 56.20003 — 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 56.14206 — Securing movable parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14206
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **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 46.9 — Records of training.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **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
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **30 CFR 56.13015 — Inspection of compressed-air receivers and other unfired pressure vessels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-L/section-56.13015

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2000-05-16 through 2013-01-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1996-01-30 through 1996-01-30; source ID `msha-addresses`
- **Assessed Violations:** 70 rows; 2000-09-18 through 2025-12-02; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 16 rows; 2004-04-13 through 2013-08-14; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 3 rows; 2019-09-18 through 2026-01-14; source ID `msha-conferences`
- **Contested Violations:** 14 rows; 2005-07-12 through 2013-03-14; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 261 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 58 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1986-07-01 through 1992-09-22; source ID `msha-controller-operator-history`
- **Inspections:** 68 rows; 2000-09-18 through 2026-04-15; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 246 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 45 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:** 19 rows; 2002-06-04 through 2024-11-20; source ID `msha-personal-health-samples`
- **Violations:** 71 rows; 2000-09-18 through 2025-12-02; 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/hogan-quarry-0404819`
- JSON: `/api/v1/mines/hogan-quarry-0404819`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404819/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404819/relationships`
- MCP resource: `mine://0404819/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`