# Harding Street Quarry-Sand & Gravel

- **MSHA mine ID:** 1200620
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Marion, IN
- **Operator:** Hanson Aggregates Midwest, LLC
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 266
- **Source coverage:** 13 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → Hanson Aggregates Midwest, LLC (L16286) → Harding Street Quarry-Sand & Gravel (1200620)**

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 1200620; source `msha-controller-operator-history`.
- **Consolidated Gold Fields Limited → American Aggregates Corp:** 1987-03-01 through 1989-08-09; derived from co-tenure at mine 1200620; source `msha-controller-operator-history`.
- **Hanson PLC → American Aggregates Corp:** 1989-08-10 through 1990-02-01; derived from co-tenure at mine 1200620; source `msha-controller-operator-history`.
- **CSR Ltd → American Aggregates Corp:** 1990-02-02 through 1997-05-27; derived from co-tenure at mine 1200620; source `msha-controller-operator-history`.
- **Martin Marietta Materials Inc → Martin Marietta Aggregates:** 1997-05-28 through 1998-01-18; derived from co-tenure at mine 1200620; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Aggregates Midwest, LLC:** 1998-01-19 through 2007-08-22; derived from co-tenure at mine 1200620; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Aggregates Midwest, LLC:** 2007-08-23 through current/open; derived from co-tenure at mine 1200620; source `msha-controller-operator-history`.

- History rows: 7
- Typed edges: 20
- 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: 2026-10-18T09:31:49.615908+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 2 historical accident/injury rows; 0 coded fatalities and 30 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 25 violation rows across the full record; 8 carry an S&S flag and $2,588 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 873 employee hours and 2 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 civil-penalty docket/decision rows, and 1 conference records linked by issuance number.
6. **CONTRACTORS — 2 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 — 0 since 2021:** Inspections 28 inspection events and 300 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 56.20011 — Barricades and warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-S/section-56.20011
- **30 CFR 56.9304 — Unstable ground.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9304
- **30 CFR 56.15005 — Safety belts and lines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15005
- **30 CFR 56.14101 — Brakes.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **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 56.9300 — Berms or guardrails.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **30 CFR 56.4101 — Warning signs.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4101
- **30 CFR 56.11001 — Safe access.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11001

## Source coverage

- **Accident, Injuries, and Illnesses:** 2 rows; 2000-10-15 through 2004-01-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-03-01 through 2011-03-01; source ID `msha-addresses`
- **Assessed Violations:** 24 rows; 2000-06-01 through 2009-07-09; source ID `msha-assessed-violations`
- **Conferences:** 1 rows; 2003-07-29 through 2003-07-29; source ID `msha-conferences`
- **Contractor Employment and Production — Quarterly:** 69 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 15 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 7 rows; 1950-01-01 through 1998-01-19; source ID `msha-controller-operator-history`
- **Inspections:** 28 rows; 2000-06-01 through 2011-03-24; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 79 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 13 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; 2002-11-06 through 2002-11-06; source ID `msha-personal-health-samples`
- **Violations:** 25 rows; 2000-06-01 through 2009-07-09; 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/harding-street-quarry-sand-gravel-1200620`
- JSON: `/api/v1/mines/harding-street-quarry-sand-gravel-1200620`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1200620/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1200620/relationships`
- MCP resource: `mine://1200620/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`