# Sanger Aggregate Plant

- **MSHA mine ID:** 0405799
- **Status:** Active
- **Type / commodity:** Surface / Sand, Industrial NEC
- **Location:** Fresno, CA
- **Operator:** Martin Marietta Northern California Aggregates LLC
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 646
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Northern California Aggregates LLC (0064607) → Sanger Aggregate Plant (0405799)**

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

## Controller and operator valid-time history

- **Heidelberg Materials AG → Calaveras Materials Inc.:** 2012-04-12 through 2013-09-17; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **April  Papich et al → Papich Construction Company Inc.:** 2013-09-18 through 2015-08-12; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Jason  Papich et al → Papich Construction Company Inc.:** 2013-09-18 through 2015-08-12; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Calaveras Materials LLC:** 2015-08-13 through 2021-09-30; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Calaveras Materials Inc.:** 2021-10-01 through 2013-09-17; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Calaveras Materials LLC:** 2021-10-01 through 2023-01-19; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Martin Marietta Northern California Aggregates LLC:** 2023-01-20 through 2021-09-30; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Northern California Aggregates LLC:** 2023-01-20 through current/open; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Hanson PLC → Martin Marietta Northern California Aggregates LLC:** 2023-01-20 through 2007-08-22; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.
- **Granite Construction Inc → Papich Construction Company Inc.:** 2025-08-06 through 2015-08-12; derived from co-tenure at mine 0405799; source `msha-controller-operator-history`.

- History rows: 10
- Typed edges: 20
- Interval anomalies: 4
- 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 — 4 since 2021:** Accidents and injuries 5 historical accident/injury rows; 0 coded fatalities and 7 lost days across the published record.
2. **COMPLIANCE — 60 since 2021:** Violations and penalties 117 violation rows across the full record; 28 carry an S&S flag and $32,343 appears in current assessed amounts.
3. **HEALTH — 4 samples:** Occupational health samples 4 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 8K employee hours and 13 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 15 linked rows:** Contests, conferences and decisions 3 contested-violation rows, 3 civil-penalty docket/decision rows, and 9 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 20 since 2021:** Inspections 31 inspection events and 603 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 56.12004 — Electrical conductors.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **30 CFR 46.9 — Records of training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.9
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **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 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 56.12032 — Inspection and cover plates.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 56.12068 — Locking transformer enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12068
- **30 CFR 56.12028 — Testing grounding systems.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2014-03-07 through 2026-06-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2019-09-30 through 2019-09-30; source ID `msha-addresses`
- **Assessed Violations:** 116 rows; 2015-03-13 through 2026-06-02; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2022-06-01 through 2022-06-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 9 rows; 2015-04-22 through 2022-09-13; source ID `msha-conferences`
- **Contested Violations:** 3 rows; 2021-10-05 through 2021-10-05; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 170 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 30 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 10 rows; 2012-04-12 through 2023-01-20; source ID `msha-controller-operator-history`
- **Inspections:** 31 rows; 2015-03-13 through 2026-06-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 114 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 32 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:** 4 rows; 2020-02-11 through 2026-06-02; source ID `msha-personal-health-samples`
- **Violations:** 117 rows; 2015-03-13 through 2026-06-02; 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/sanger-aggregate-plant-0405799`
- JSON: `/api/v1/mines/sanger-aggregate-plant-0405799`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405799/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405799/relationships`
- MCP resource: `mine://0405799/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`