# I-75 QUARRY

- **MSHA mine ID:** 4001247
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Knox, TN
- **Operator:** Martin Marietta Southeast Agg Operations, LLC
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 2,580
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Southeast Agg Operations, LLC (0200133) → I-75 QUARRY (4001247)**

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

## Controller and operator valid-time history

- **Jay H  Crippen → I-75 Crushed Stone Company Inc:** 1950-01-01 through 1999-11-16; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Grupo Mexico S A B de C V → American Limestone Company Inc:** 1999-11-17 through 2000-06-30; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **CSR Ltd → Rinker Materials South Central, Inc.:** 2000-07-01 through 2003-03-31; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Rinker Group Ltd → Rinker Materials South Central, Inc.:** 2003-04-01 through 2007-07-09; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Cemex S A → Rinker Materials South Central, Inc.:** 2007-07-10 through 2008-02-21; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Ready Mix USA Inc → Aggregates USA LLC:** 2008-02-22 through 2010-02-05; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Aggregates USA Holdings LLC → Aggregates USA LLC:** 2010-02-06 through 2017-12-29; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Blue Water Industries Holdings LLC → Blue Water Industries:** 2017-12-30 through 2024-04-28; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Blue Water Industries:** 2024-04-29 through 2024-12-11; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Southeast Agg Operations, LLC:** 2024-12-12 through current/open; derived from co-tenure at mine 4001247; source `msha-controller-operator-history`.

- History rows: 10
- Typed edges: 27
- 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 8 historical accident/injury rows; 1 coded fatalities and 69 lost days across the published record.
2. **COMPLIANCE — 4 since 2021:** Violations and penalties 106 violation rows across the full record; 26 carry an S&S flag and $37,151 appears in current assessed amounts.
3. **HEALTH — 29 samples:** Occupational health samples 29 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 13 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 14 linked rows:** Contests, conferences and decisions 5 contested-violation rows, 5 civil-penalty docket/decision rows, and 4 conference records linked by issuance number.
6. **CONTRACTORS — 10 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 — 17 since 2021:** Inspections 86 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 56.12004 — Electrical conductors.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12004
- **30 CFR 56.11001 — Safe access.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001
- **30 CFR 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **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
- **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 56.20003 — 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 56.9300 — 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 56.12005 — Protection of power conductors from mobile equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12005
- **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:** 8 rows; 2005-01-12 through 2024-09-20; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2012-05-04 through 2012-05-04; source ID `msha-addresses`
- **Assessed Violations:** 103 rows; 2000-04-10 through 2025-01-22; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 5 rows; 2010-02-24 through 2025-09-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 4 rows; 2000-04-24 through 2001-04-09; source ID `msha-conferences`
- **Contested Violations:** 5 rows; 2008-01-29 through 2025-01-22; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,500 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 323 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 10 rows; 1950-01-01 through 2024-12-12; source ID `msha-controller-operator-history`
- **Inspections:** 86 rows; 2000-04-10 through 2026-09-08; 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:** 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:** 29 rows; 2003-05-01 through 2025-08-27; source ID `msha-personal-health-samples`
- **Violations:** 106 rows; 2000-04-10 through 2026-09-08; 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/i-75-quarry-4001247`
- JSON: `/api/v1/mines/i-75-quarry-4001247`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4001247/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4001247/relationships`
- MCP resource: `mine://4001247/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`