# Lookout Valley Quarry

- **MSHA mine ID:** 4000060
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Hamilton, TN
- **Operator:** Midsouth Aggregates
- **Controller:** CRH PLC
- **Public source rows linked:** 2,297
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Midsouth Aggregates (0051196) → Lookout Valley Quarry (4000060)**

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

## Controller and operator valid-time history

- **Koppers Company Inc → Stone Man Inc:** 1950-01-01 through 1988-11-13; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Southeast Inc:** 1988-11-14 through 2002-01-31; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Stoneman, Inc.:** 2002-02-01 through 2003-07-10; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **CRH PLC → Midsouth Aggregates:** 2003-07-11 through 2020-01-16; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **U S Aggregate Inc → Midsouth Aggregates:** 2003-07-11 through 2002-05-28; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Aggregates Southeast Inc:** 2007-08-23 through 2002-01-31; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **Ashland Inc → Midsouth Aggregates:** 2020-01-17 through 2006-08-27; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.
- **CRH PLC → Midsouth Aggregates:** 2020-01-17 through current/open; derived from co-tenure at mine 4000060; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 21
- Interval anomalies: 3
- 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 5 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 13 since 2021:** Violations and penalties 73 violation rows across the full record; 16 carry an S&S flag and $15,022 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 7K employee hours and 14 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 21 linked rows:** Contests, conferences and decisions 6 contested-violation rows, 6 civil-penalty docket/decision rows, and 9 conference records linked by issuance number.
6. **CONTRACTORS — 9 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 — 11 since 2021:** Inspections 76 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 56.12025 — Grounding circuit enclosures.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12025
- **30 CFR 41.12 — Changes; notification by operator.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-G/part-41/subpart-B/section-41.12
- **30 CFR 56.12008 — Insulation and fittings for power wires and cables.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301
- **30 CFR 56.4200 — General requirements.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4200
- **30 CFR 56.14100 — Safety defects; examination, correction and records.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.4603 — Closure of valves.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4603
- **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 56.14132 — 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 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:** 5 rows; 2003-11-18 through 2026-08-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2008-08-07 through 2008-08-07; source ID `msha-addresses`
- **Assessed Violations:** 73 rows; 2000-06-15 through 2026-05-13; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 6 rows; 2009-02-26 through 2015-11-25; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 9 rows; 2000-02-20 through 2020-08-10; source ID `msha-conferences`
- **Contested Violations:** 6 rows; 2008-03-07 through 2015-04-28; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,304 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 321 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 1950-01-01 through 2020-01-17; source ID `msha-controller-operator-history`
- **Inspections:** 76 rows; 2000-02-15 through 2026-05-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 318 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 70 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; 2004-01-08 through 2026-05-13; source ID `msha-personal-health-samples`
- **Violations:** 73 rows; 2000-06-15 through 2026-05-13; 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/lookout-valley-quarry-4000060`
- JSON: `/api/v1/mines/lookout-valley-quarry-4000060`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4000060/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4000060/relationships`
- MCP resource: `mine://4000060/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`