# STRINGER PIT

- **MSHA mine ID:** 0405403
- **Status:** Active
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Yuba, CA
- **Operator:** Silica Resources, Inc.
- **Controller:** Donald  Mallory; Steven R Mallory
- **Public source rows linked:** 588
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Donald  Mallory; Steven R Mallory (0172120) → Silica Resources, Inc. (L38446) → STRINGER PIT (0405403)**

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

## Controller and operator valid-time history

- **Jack L  Greenhalgh → Mallory & Greenhalgh Inc:** 2000-02-01 through 2006-02-16; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Jack L  Greenhalgh → Silica Resources, Inc.:** 2006-02-17 through 2014-07-31; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Marlys E  Greenhalgh et al → Silica Resources, Inc.:** 2014-08-01 through 2021-12-27; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Edward  Mallory et al → Silica Resources, Inc.:** 2014-08-01 through 2021-12-27; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Steven R Mallory et al → Silica Resources, Inc.:** 2021-12-28 through 2022-09-11; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Estate of Marlys Greenhalgh et al → Silica Resources, Inc.:** 2021-12-28 through 2022-09-11; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Steven R Mallory et al → Silica Resources, Inc.:** 2022-09-12 through current/open; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.
- **Donald  Mallory et al → Silica Resources, Inc.:** 2022-09-12 through current/open; derived from co-tenure at mine 0405403; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 15
- 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 — 1 since 2021:** Accidents and injuries 4 historical accident/injury rows; 0 coded fatalities and 121 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 61 violation rows across the full record; 12 carry an S&S flag and $13,253 appears in current assessed amounts.
3. **HEALTH — 26 samples:** Occupational health samples 26 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 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 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 — 12 since 2021:** Inspections 65 inspection events and 720 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 56.14101 — Brakes.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14112 — Construction and maintenance of guards.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **30 CFR 56.11027 — Scaffolds and working platforms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11027
- **30 CFR 46.6 — Newly hired experienced miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.6
- **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 56.12032 — Inspection and cover plates.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12032
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 4 rows; 2010-04-09 through 2022-09-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2000-02-03 through 2000-02-03; source ID `msha-addresses`
- **Assessed Violations:** 61 rows; 2000-10-19 through 2019-10-29; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2012-09-10 through 2012-09-10; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2012-04-04 through 2012-04-04; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 99 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 26 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 2000-02-01 through 2006-02-17; source ID `msha-controller-operator-history`
- **Inspections:** 65 rows; 2000-02-02 through 2026-06-24; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 186 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 48 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:** 26 rows; 2001-04-10 through 2025-10-08; source ID `msha-personal-health-samples`
- **Violations:** 61 rows; 2000-10-19 through 2019-10-29; 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/stringer-pit-0405403`
- JSON: `/api/v1/mines/stringer-pit-0405403`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/0405403/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/0405403/relationships`
- MCP resource: `mine://0405403/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`