# Piedra #1

- **MSHA mine ID:** 3402162
- **Status:** Active
- **Type / commodity:** Surface / Dimension Sandstone
- **Location:** Mcintosh, OK
- **Operator:** OK Rock Quarries LLC
- **Controller:** Patricia  Melton
- **Public source rows linked:** 111
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Patricia  Melton (0061289) → OK Rock Quarries LLC (0073183) → Piedra #1 (3402162)**

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

## Controller and operator valid-time history

- **Patricia  Melton → OK Rock Quarries LLC:** 2017-02-01 through 2010-09-30; derived from co-tenure at mine 3402162; source `msha-controller-operator-history`.
- **David E  Baker → OK Rock Quarries LLC:** 2017-02-01 through 2022-06-14; derived from co-tenure at mine 3402162; source `msha-controller-operator-history`.
- **Patricia  Melton → OK Rock Quarries LLC:** 2022-06-15 through current/open; derived from co-tenure at mine 3402162; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- Interval anomalies: 1
- 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 — 7 since 2021:** Violations and penalties 7 violation rows across the full record; 1 carry an S&S flag and $1,058 appears in current assessed amounts.
3. **HEALTH — 1 samples:** Occupational health samples 1 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 240 employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 0 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 — 8 since 2021:** Inspections 10 inspection events and 73 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 56.15001 — First-aid materials.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15001
- **30 CFR 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **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 46.8 — Annual refresher training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.8
- **30 CFR 56.20008 — Toilet facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20008
- **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

## Source coverage

- **Addresses of Record:** 1 rows; 2026-05-27 through 2026-05-27; source ID `msha-addresses`
- **Assessed Violations:** 7 rows; 2023-08-01 through 2026-08-05; source ID `msha-assessed-violations`
- **Controller and Operator History:** 3 rows; 2017-02-01 through 2017-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 10 rows; 2017-09-06 through 2026-09-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 64 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 17 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:** 1 rows; 2026-09-22 through 2026-09-22; source ID `msha-personal-health-samples`
- **Violations:** 7 rows; 2023-08-01 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/piedra-1-3402162`
- JSON: `/api/v1/mines/piedra-1-3402162`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3402162/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3402162/relationships`
- MCP resource: `mine://3402162/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`