# Acton Clay Quarries - **MSHA mine ID:** 0405169 - **Status:** Active - **Type / commodity:** Surface / Clay, Ceramic, Refractory Mnls. - **Location:** Los Angeles, CA - **Operator:** North Star Minerals Inc - **Controller:** Yen Richardson; Garry Richardson; Scott Richardson - **Public source rows linked:** 694 - **Source coverage:** 15 / 20 - **Generated:** 2026-10-13T11:26:59.401Z ## Current entity hierarchy **Yen Richardson; Garry Richardson; Scott Richardson (0186100) → North Star Minerals Inc (L12047) → Acton Clay Quarries (0405169)** Current identity source: `msha-mines`. This is a current snapshot, not a historical claim. ## Controller and operator valid-time history - **Yen Richardson et al → North Star Minerals Inc:** 1991-10-01 through 2024-07-17; derived from co-tenure at mine 0405169; source `msha-controller-operator-history`. - **Larie K Richardson et al → North Star Minerals Inc:** 1991-10-01 through 2024-07-17; derived from co-tenure at mine 0405169; source `msha-controller-operator-history`. - **Scott Richardson et al → North Star Minerals Inc:** 2024-07-18 through current/open; derived from co-tenure at mine 0405169; source `msha-controller-operator-history`. - **Yen Richardson et al → North Star Minerals Inc:** 2024-07-18 through current/open; derived from co-tenure at mine 0405169; source `msha-controller-operator-history`. - **Garry Richardson et al → North Star Minerals Inc:** 2024-07-18 through current/open; derived from co-tenure at mine 0405169; source `msha-controller-operator-history`. - History rows: 5 - Typed edges: 8 - 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 6 historical accident/injury rows; 0 coded fatalities and 277 lost days across the published record. 2. **COMPLIANCE — 11 since 2021:** Violations and penalties 99 violation rows across the full record; 19 carry an S&S flag and $11,765 appears in current assessed amounts. 3. **HEALTH — 12 samples:** Occupational health samples 12 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 10 summed average employees across reported subunits in the latest published quarter. 5. **LEGAL — 82 linked rows:** Contests, conferences and decisions 13 contested-violation rows, 55 civil-penalty docket/decision rows, and 14 conference records linked by issuance number. 6. **CONTRACTORS — 2 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 — 16 since 2021:** Inspections 67 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 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 56.12028 — Testing grounding systems.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028 - **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008 - **30 CFR 56.4501 — Fuel lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4501 - **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30 - **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101 - **30 CFR 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023 - **30 CFR 50.12 — Preservation of evidence.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-B/section-50.12 - **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 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 ## Source coverage - **Accident, Injuries, and Illnesses:** 6 rows; 2000-08-09 through 2026-02-10; source ID `msha-accidents` - **Addresses of Record:** 1 rows; 1994-03-25 through 1994-03-25; source ID `msha-addresses` - **Assessed Violations:** 99 rows; 2000-05-15 through 2026-04-01; source ID `msha-assessed-violations` - **Civil Penalty Dockets and Decisions:** 55 rows; 2000-12-05 through 2017-08-16; source ID `msha-civil-penalty-dockets-decisions` - **Conferences:** 14 rows; 2001-08-03 through 2021-07-26; source ID `msha-conferences` - **Contested Violations:** 13 rows; 2010-03-23 through 2016-11-15; source ID `msha-contested-violations` - **Contractor Employment and Production — Quarterly:** 41 rows; unknown through unknown; source ID `msha-contractor-production-quarterly` - **Contractor Employment and Production — Yearly:** 15 rows; unknown through unknown; source ID `msha-contractor-production-yearly` - **Controller and Operator History:** 5 rows; 1991-10-01 through 1991-10-01; source ID `msha-controller-operator-history` - **Inspections:** 67 rows; 2000-02-29 through 2026-04-01; source ID `msha-inspections` - **Mine Employment and Production — Quarterly:** 212 rows; unknown through unknown; source ID `msha-mine-production-quarterly` - **Mine Employment and Production — Yearly:** 54 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:** 12 rows; 2002-08-14 through 2023-08-24; source ID `msha-personal-health-samples` - **Violations:** 99 rows; 2000-05-15 through 2026-04-01; 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/acton-clay-quarries-0405169` - JSON: `/api/v1/mines/acton-clay-quarries-0405169` - Silica records, units, sample status and quarterly means: `/api/v1/mines/0405169/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows) - Relationship JSON: `/api/v1/mines/0405169/relationships` - MCP resource: `mine://0405169/assessment` - Complete Title 30 corpus: `/data/title30-sections.json`