# Five Bridges Aggregate Plant

- **MSHA mine ID:** 0401869
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Inyo, CA
- **Operator:** Granite Construction Company
- **Controller:** Granite Construction Inc
- **Public source rows linked:** 217
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Granite Construction Inc (M00079) → Granite Construction Company (L00039) → Five Bridges Aggregate Plant (0401869)**

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

## Controller and operator valid-time history

- **Dennis P  Nikolaus → Nikolaus & Nikolaus Inc:** 1950-01-01 through 2001-05-07; derived from co-tenure at mine 0401869; source `msha-controller-operator-history`.
- **Granite Construction Inc → Intermountain Slurry Seal Inc:** 2001-05-08 through 2009-04-27; derived from co-tenure at mine 0401869; source `msha-controller-operator-history`.
- **Granite Construction Inc → Granite Construction Company:** 2009-04-28 through current/open; derived from co-tenure at mine 0401869; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 7 historical accident/injury rows; 0 coded fatalities and 135 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 26 violation rows across the full record; 1 carry an S&S flag and $1,906 appears in current assessed amounts.
3. **HEALTH — 5 samples:** Occupational health samples 5 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 4K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 3 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 1 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 — 1 since 2021:** Inspections 15 inspection events and 212 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 56.1000 — 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 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 56.14107 — Moving machine parts.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.4603 — Closure of valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4603
- **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 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **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 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2001-02-05 through 2005-06-22; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-03-31 through 2026-03-31; source ID `msha-addresses`
- **Assessed Violations:** 26 rows; 2000-08-22 through 2024-06-04; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2011-09-20 through 2011-09-20; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2024-09-06 through 2024-09-06; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2010-09-14 through 2010-09-14; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2009-04-28; source ID `msha-controller-operator-history`
- **Inspections:** 15 rows; 2000-08-22 through 2024-06-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 100 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 30 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:** 5 rows; 2000-08-23 through 2019-04-15; source ID `msha-personal-health-samples`
- **Violations:** 26 rows; 2000-08-22 through 2024-06-04; 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/five-bridges-aggregate-plant-0401869`
- JSON: `/api/v1/mines/five-bridges-aggregate-plant-0401869`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0401869/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0401869/relationships`
- MCP resource: `mine://0401869/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`