# NorCal Sand and Rock

- **MSHA mine ID:** 0405547
- **Status:** Abandoned
- **Type / commodity:** Surface / Sand, Common
- **Location:** Butte, CA
- **Operator:** NorCal Sand and Rock Inc.
- **Controller:** Kelly Michael  Hickerson
- **Public source rows linked:** 1,773
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Kelly Michael  Hickerson (0156161) → NorCal Sand and Rock Inc. (0171293) → NorCal Sand and Rock (0405547)**

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

## Controller and operator valid-time history

- **James Bradley  Slender → Valley Sand and Rock, Inc:** 2002-12-19 through 2018-04-29; derived from co-tenure at mine 0405547; source `msha-controller-operator-history`.
- **K Michael  Hickerson et al → Valley Sand and Rock, Inc:** 2018-04-30 through 2020-03-17; derived from co-tenure at mine 0405547; source `msha-controller-operator-history`.
- **Darwin  Christ et al → Valley Sand and Rock, Inc:** 2018-04-30 through 2020-03-17; derived from co-tenure at mine 0405547; source `msha-controller-operator-history`.
- **Brad  Slender et al → Valley Sand and Rock, Inc:** 2018-04-30 through 2020-03-17; derived from co-tenure at mine 0405547; source `msha-controller-operator-history`.
- **Kelly Michael  Hickerson → NorCal Sand and Rock Inc.:** 2020-03-18 through current/open; derived from co-tenure at mine 0405547; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 10
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 7 historical accident/injury rows; 0 coded fatalities and 392 lost days across the published record.
2. **COMPLIANCE — 19 since 2021:** Violations and penalties 637 violation rows across the full record; 264 carry an S&S flag and $848,807 appears in current assessed amounts.
3. **HEALTH — 21 samples:** Occupational health samples 21 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 — No published quarter:** Quarterly production and employment The source remains registered, but no mine-keyed quarterly production row was published.
5. **LEGAL — 316 linked rows:** Contests, conferences and decisions 141 contested-violation rows, 139 civil-penalty docket/decision rows, and 36 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 — 10 since 2021:** Inspections 110 inspection events and 2K 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 56.14112 — 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 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **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 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41
- **30 CFR 56.4203 — Extinguisher recharging or replacement.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4203
- **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 56.12034 — 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 56.15014 — Eye protection when operating grinding wheels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15014
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.14130 — Roll-over protective structures (ROPS) and seat belts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14130

## Source coverage

- **Accident, Injuries, and Illnesses:** 7 rows; 2009-09-24 through 2014-04-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2025-05-27 through 2025-05-27; source ID `msha-addresses`
- **Assessed Violations:** 619 rows; 2003-06-10 through 2024-07-16; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 139 rows; 2007-04-17 through 2018-02-21; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 36 rows; 2013-03-06 through 2016-06-07; source ID `msha-conferences`
- **Contested Violations:** 141 rows; 2006-06-28 through 2016-10-05; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 9 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 3 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 2002-12-19 through 2020-03-18; source ID `msha-controller-operator-history`
- **Inspections:** 110 rows; 2003-04-15 through 2025-02-24; source ID `msha-inspections`
- **Mine Employment and Production — Yearly:** 44 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:** 21 rows; 2009-10-15 through 2024-07-17; source ID `msha-personal-health-samples`
- **Violations:** 637 rows; 2003-06-10 through 2024-07-16; 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/norcal-sand-and-rock-0405547`
- JSON: `/api/v1/mines/norcal-sand-and-rock-0405547`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405547/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405547/relationships`
- MCP resource: `mine://0405547/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`