# Guadalupe

- **MSHA mine ID:** 0400174
- **Status:** Temporarily Idled
- **Type / commodity:** Surface / Crushed, Broken Sandstone
- **Location:** San Mateo, CA
- **Operator:** Evans Brothers Inc
- **Controller:** Dan  Evans
- **Public source rows linked:** 1,243
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Dan  Evans (0118621) → Evans Brothers Inc (0091225) → Guadalupe (0400174)**

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

## Controller and operator valid-time history

- **Mary  Bottoms → Quarry Products Inc:** 1950-01-01 through 1986-09-30; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Sam  Johnson  et al → American Rock & Asphalt Inc:** 1986-10-01 through 1996-01-04; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Ralph  Johnson  et al → American Rock & Asphalt Inc:** 1986-10-01 through 1996-01-04; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Brad  Johnson  et al → California Rock & Asphalt Inc:** 1996-01-05 through 2007-08-03; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Estate of David(Sam) Johnson et al → California Rock & Asphalt Inc:** 1996-01-05 through 2007-08-03; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Dan  Evans  et al → Evans Brothers Inc:** 2007-08-04 through 2015-06-29; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Wayne  Evans  et al → Evans Brothers Inc:** 2007-08-04 through 2015-06-29; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.
- **Dan  Evans → Evans Brothers Inc:** 2015-06-30 through current/open; derived from co-tenure at mine 0400174; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 17
- 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 6 historical accident/injury rows; 0 coded fatalities and 366 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 193 violation rows across the full record; 64 carry an S&S flag and $40,685 appears in current assessed amounts.
3. **HEALTH — 24 samples:** Occupational health samples 24 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 0 employee hours and 0 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 49 linked rows:** Contests, conferences and decisions 20 contested-violation rows, 22 civil-penalty docket/decision rows, and 7 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 70 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 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 56.12032 — Inspection and cover plates.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 56.12034 — Guarding around lights.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12034
- **30 CFR 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **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 56.20003 — 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 56.12018 — Identification of power switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12018
- **30 CFR 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402

## Source coverage

- **Accident, Injuries, and Illnesses:** 6 rows; 2000-09-01 through 2007-01-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-09-02 through 2026-09-02; source ID `msha-addresses`
- **Assessed Violations:** 190 rows; 2000-02-24 through 2023-06-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 22 rows; 2000-06-26 through 2013-10-21; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 7 rows; 2003-03-31 through 2016-04-29; source ID `msha-conferences`
- **Contested Violations:** 20 rows; 2008-10-07 through 2012-10-23; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 314 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 81 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 1950-01-01 through 2007-08-04; source ID `msha-controller-operator-history`
- **Inspections:** 70 rows; 2000-02-24 through 2026-08-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 254 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 52 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:** 24 rows; 2001-05-02 through 2024-08-01; source ID `msha-personal-health-samples`
- **Violations:** 193 rows; 2000-02-24 through 2023-06-13; 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/guadalupe-0400174`
- JSON: `/api/v1/mines/guadalupe-0400174`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0400174/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0400174/relationships`
- MCP resource: `mine://0400174/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`