# Cowan Quarry

- **MSHA mine ID:** 4000021
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Franklin, TN
- **Operator:** Rogers Group Inc
- **Controller:** Rogers Group Inc
- **Public source rows linked:** 1,278
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Rogers Group Inc (M00452) → Rogers Group Inc (L06514) → Cowan Quarry (4000021)**

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

## Controller and operator valid-time history

- **Cowan Stone Company → Cowan Stone Company:** 1950-01-01 through 1989-09-15; derived from co-tenure at mine 4000021; source `msha-controller-operator-history`.
- **Leonard T  Lewis → Crushed Stone Inc:** 1989-09-16 through 1991-12-18; derived from co-tenure at mine 4000021; source `msha-controller-operator-history`.
- **Rogers Group Inc → Rogers Group Inc:** 1991-12-19 through current/open; derived from co-tenure at mine 4000021; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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 — 2 since 2021:** Accidents and injuries 9 historical accident/injury rows; 0 coded fatalities and 319 lost days across the published record.
2. **COMPLIANCE — 6 since 2021:** Violations and penalties 82 violation rows across the full record; 15 carry an S&S flag and $9,643 appears in current assessed amounts.
3. **HEALTH — 53 samples:** Occupational health samples 53 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 3K employee hours and 5 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 civil-penalty docket/decision rows, and 11 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 13 since 2021:** Inspections 68 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 56.16006 — Protection of gas cylinder valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16006
- **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 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 56.14107 — 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
- **30 CFR 50.20-7 — Criteria—MSHA Form 7000-1, Section D.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-C/section-50.20-7
- **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 56.14132 — 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 56.9300 — Berms or guardrails.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **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 56.16005 — Securing gas cylinders.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-O/section-56.16005
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30

## Source coverage

- **Accident, Injuries, and Illnesses:** 9 rows; 2003-07-26 through 2026-09-23; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-11-15 through 2011-11-15; source ID `msha-addresses`
- **Assessed Violations:** 79 rows; 2000-08-08 through 2025-12-09; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2005-03-22 through 2018-05-21; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 11 rows; 2004-09-27 through 2014-11-04; source ID `msha-conferences`
- **Contested Violations:** 5 rows; 2004-08-31 through 2017-10-17; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 458 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 109 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1991-12-19; source ID `msha-controller-operator-history`
- **Inspections:** 68 rows; 2000-08-08 through 2026-04-28; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 313 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 81 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:** 53 rows; 2002-03-21 through 2026-04-30; source ID `msha-personal-health-samples`
- **Violations:** 82 rows; 2000-08-08 through 2025-12-09; 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/cowan-quarry-4000021`
- JSON: `/api/v1/mines/cowan-quarry-4000021`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4000021/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4000021/relationships`
- MCP resource: `mine://4000021/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`