# RED TOP MINE

- **MSHA mine ID:** 0404707
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Stone NEC
- **Location:** San Bernardino, CA
- **Operator:** Sierra Aggregate Company, Inc.
- **Controller:** Derek  Norris; Scott  Worley
- **Public source rows linked:** 565
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Derek  Norris; Scott  Worley (0188981) → Sierra Aggregate Company, Inc. (L38437) → RED TOP MINE (0404707)**

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

## Controller and operator valid-time history

- **Donald G  Jolly → Sierra Aggregate Company, Inc.:** 1984-06-01 through 2024-05-12; derived from co-tenure at mine 0404707; source `msha-controller-operator-history`.
- **Scott  Worley et al → Sierra Aggregate Company, Inc.:** 2024-05-13 through current/open; derived from co-tenure at mine 0404707; source `msha-controller-operator-history`.
- **Derek  Norris et al → Sierra Aggregate Company, Inc.:** 2024-05-13 through current/open; derived from co-tenure at mine 0404707; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 6
- 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 22 since 2021:** Violations and penalties 146 violation rows across the full record; 32 carry an S&S flag and $26,989 appears in current assessed amounts.
3. **HEALTH — 13 samples:** Occupational health samples 9 personal; 4 area. 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 950 employee hours and 3 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 63 linked rows:** Contests, conferences and decisions 28 contested-violation rows, 29 civil-penalty docket/decision rows, and 6 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 — 11 since 2021:** Inspections 59 inspection events and 925 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 56.12005 — Protection of power conductors from mobile equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12005
- **30 CFR 56.14107 — Moving machine parts.** (5 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 56.11002 — Handrails and toeboards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11002
- **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 47.71 — Access to HazCom materials.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-H/section-47.71
- **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
- **30 CFR 56.12002 — Controls and switches.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12002

## Source coverage

- **Addresses of Record:** 1 rows; 2025-04-01 through 2025-04-01; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 4 rows; 2024-11-14 through 2024-11-14; source ID `msha-area-samples`
- **Assessed Violations:** 146 rows; 2000-01-12 through 2026-08-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 29 rows; 2003-03-26 through 2012-12-17; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 6 rows; 2001-08-15 through 2002-06-03; source ID `msha-conferences`
- **Contested Violations:** 28 rows; 2007-04-26 through 2012-01-11; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1984-06-01 through 1984-06-01; source ID `msha-controller-operator-history`
- **Inspections:** 59 rows; 2000-01-12 through 2026-08-13; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 106 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 27 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:** 9 rows; 2005-02-16 through 2026-08-06; source ID `msha-personal-health-samples`
- **Violations:** 146 rows; 2000-01-12 through 2026-08-05; 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/red-top-mine-0404707`
- JSON: `/api/v1/mines/red-top-mine-0404707`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404707/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404707/relationships`
- MCP resource: `mine://0404707/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`