# Mojave Pit

- **MSHA mine ID:** 0404665
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Kern, CA
- **Operator:** Holliday Rock Company Inc
- **Controller:** Penny J  Holliday
- **Public source rows linked:** 568
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Penny J  Holliday (M00110) → Holliday Rock Company Inc (L01650) → Mojave Pit (0404665)**

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

## Controller and operator valid-time history

- **H C  Hemperly Jr → Asphalt Construction Company Inc:** 1983-08-01 through 1992-12-31; derived from co-tenure at mine 0404665; source `msha-controller-operator-history`.
- **A C  Warnack → East Kern Aggregates Inc:** 1993-01-01 through 1998-09-06; derived from co-tenure at mine 0404665; source `msha-controller-operator-history`.
- **H C  Hemperly Jr → Asphalt Construction Company Inc:** 1998-09-07 through 2007-07-25; derived from co-tenure at mine 0404665; source `msha-controller-operator-history`.
- **Penny J  Holliday et al → Holliday Rock Company Inc:** 2007-07-26 through current/open; derived from co-tenure at mine 0404665; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- 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 — 3 since 2021:** Accidents and injuries 9 historical accident/injury rows; 0 coded fatalities and 382 lost days across the published record.
2. **COMPLIANCE — 4 since 2021:** Violations and penalties 100 violation rows across the full record; 26 carry an S&S flag and $50,911 appears in current assessed amounts.
3. **HEALTH — 14 samples:** Occupational health samples 14 personal. 1 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 9 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 — 1 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 54 inspection events and 788 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 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 56.12004 — 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 56.12018 — 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 56.20003 — 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 56.11003 — Construction and maintenance of ladders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11003
- **30 CFR 46.7 — New task training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.7
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **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 56.14107 — 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

## Source coverage

- **Accident, Injuries, and Illnesses:** 9 rows; 2005-05-18 through 2025-08-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2021-10-26 through 2021-10-26; source ID `msha-addresses`
- **Assessed Violations:** 98 rows; 2000-04-25 through 2024-11-05; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2011-06-22 through 2011-06-22; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 1 rows; 2021-11-09 through 2021-11-09; source ID `msha-conferences`
- **Contested Violations:** 1 rows; 2009-11-03 through 2009-11-03; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 25 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 8 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 4 rows; 1983-08-01 through 2007-07-26; source ID `msha-controller-operator-history`
- **Inspections:** 54 rows; 2000-01-12 through 2026-04-22; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 202 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 49 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:** 14 rows; 2004-09-28 through 2026-04-23; source ID `msha-personal-health-samples`
- **Violations:** 100 rows; 2000-04-25 through 2024-11-05; 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/mojave-pit-0404665`
- JSON: `/api/v1/mines/mojave-pit-0404665`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0404665/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0404665/relationships`
- MCP resource: `mine://0404665/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`