# North Indianapolis Quarry & Mill

- **MSHA mine ID:** 1200002
- **Status:** NonProducing
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Hamilton, IN
- **Operator:** Martin Marietta Materials Inc
- **Controller:** Martin Marietta Materials Inc
- **Public source rows linked:** 3,179
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Martin Marietta Materials Inc (M00174) → Martin Marietta Materials Inc (L16197) → North Indianapolis Quarry & Mill (1200002)**

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

## Controller and operator valid-time history

- **American Aggregates Corp → American Aggregates Corp:** 1950-01-01 through 1987-02-28; derived from co-tenure at mine 1200002; source `msha-controller-operator-history`.
- **Consolidated Gold Fields Limited → American Aggregates Corp:** 1987-03-01 through 1989-08-06; derived from co-tenure at mine 1200002; source `msha-controller-operator-history`.
- **Hanson PLC → American Aggregates Corp:** 1989-08-07 through 1990-02-01; derived from co-tenure at mine 1200002; source `msha-controller-operator-history`.
- **CSR Ltd → American Aggregates Corp:** 1990-02-02 through 1997-05-27; derived from co-tenure at mine 1200002; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Aggregates:** 1997-05-28 through 2005-05-19; derived from co-tenure at mine 1200002; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Materials Inc:** 2005-05-20 through current/open; derived from co-tenure at mine 1200002; source `msha-controller-operator-history`.

- History rows: 6
- Typed edges: 17
- 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: 2026-10-17T05:35:58.500035+00:00.

## Assessment signals

1. **SAFETY — 2 since 2021:** Accidents and injuries 33 historical accident/injury rows; 1 coded fatalities and 370 lost days across the published record.
2. **COMPLIANCE — 178 since 2021:** Violations and penalties 347 violation rows across the full record; 113 carry an S&S flag and $167,705 appears in current assessed amounts.
3. **HEALTH — 28 samples:** Occupational health samples 28 personal. 4 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 25K employee hours and 45 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 173 linked rows:** Contests, conferences and decisions 74 contested-violation rows, 74 civil-penalty docket/decision rows, and 25 conference records linked by issuance number.
6. **CONTRACTORS — 15 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 — 34 since 2021:** Inspections 104 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 56.14100 — 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 56.18002 — Examination of working places.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **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
- **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 56.4531 — Flammable or combustible liquid storage buildings or rooms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4531
- **30 CFR 56.12019 — Access to stationary electrical equipment or switchgear.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12019
- **30 CFR 56.4331 — Firefighting drills.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4331

## Source coverage

- **Accident, Injuries, and Illnesses:** 33 rows; 2000-04-07 through 2026-08-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-08-17 through 2026-08-17; source ID `msha-addresses`
- **Assessed Violations:** 343 rows; 2000-08-30 through 2026-06-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 74 rows; 2004-12-20 through 2026-09-30; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 25 rows; 2000-09-11 through 2026-09-04; source ID `msha-conferences`
- **Contested Violations:** 74 rows; 2004-03-04 through 2026-05-27; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 1,619 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 407 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 6 rows; 1950-01-01 through 2005-05-20; source ID `msha-controller-operator-history`
- **Inspections:** 104 rows; 2000-01-12 through 2026-08-17; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 36 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:** 28 rows; 2002-12-18 through 2026-05-27; source ID `msha-personal-health-samples`
- **Violations:** 347 rows; 2000-08-30 through 2026-08-17; 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/north-indianapolis-quarry-mill-1200002`
- JSON: `/api/v1/mines/north-indianapolis-quarry-mill-1200002`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1200002/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1200002/relationships`
- MCP resource: `mine://1200002/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`