# EAGLE VALLEY AGGREGATES

- **MSHA mine ID:** 0404758
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Riverside, CA
- **Operator:** Martin Marietta Southern California Aggregates,LLC
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 1,013
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Southern California Aggregates,LLC (L17823) → EAGLE VALLEY AGGREGATES (0404758)**

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

## Controller and operator valid-time history

- **Nicholas S  Mitchell → Santa Ana River Rock Company:** 1985-08-01 through 1987-12-31; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.
- **Boral Limited → Boral Resources Inc:** 1988-01-01 through 1995-06-14; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Pacific Southwest Inc:** 1995-06-15 through 2007-08-22; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Aggregates Pacific Southwest Inc:** 2007-08-23 through 2021-09-30; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Martin Marietta Southern California Aggregates,LLC:** 2021-10-01 through 2021-09-30; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Southern California Aggregates,LLC:** 2021-10-01 through current/open; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.
- **Hanson PLC → Martin Marietta Southern California Aggregates,LLC:** 2021-10-01 through 2007-08-22; derived from co-tenure at mine 0404758; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 18
- Interval anomalies: 2
- 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 11 historical accident/injury rows; 0 coded fatalities and 37 lost days across the published record.
2. **COMPLIANCE — 5 since 2021:** Violations and penalties 85 violation rows across the full record; 9 carry an S&S flag and $10,454 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 12 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 15K employee hours and 23 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 11 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 4 civil-penalty docket/decision rows, and 4 conference records linked by issuance number.
6. **CONTRACTORS — 3 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 — 16 since 2021:** Inspections 66 inspection events and 1K 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 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **30 CFR 48.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-48/subpart-A/section-48.9
- **30 CFR 56.12004 — Electrical conductors.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 11 rows; 2004-09-29 through 2021-03-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1989-03-15 through 1989-03-15; source ID `msha-addresses`
- **Assessed Violations:** 84 rows; 2000-02-02 through 2026-06-24; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 4 rows; 2002-10-07 through 2013-02-27; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2002-04-05 through 2002-04-05; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2010-04-28 through 2012-05-03; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 395 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 74 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1985-08-01 through 2021-10-01; source ID `msha-controller-operator-history`
- **Inspections:** 66 rows; 2000-02-02 through 2026-07-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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:** 12 rows; 2002-03-26 through 2025-01-15; source ID `msha-personal-health-samples`
- **Violations:** 85 rows; 2000-02-02 through 2026-06-24; 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/eagle-valley-aggregates-0404758`
- JSON: `/api/v1/mines/eagle-valley-aggregates-0404758`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404758/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404758/relationships`
- MCP resource: `mine://0404758/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`