# Lake Ariel Quarry

- **MSHA mine ID:** 3603196
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Wayne, PA
- **Operator:** Heidelberg Materials Northeast LLC
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 278
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → Heidelberg Materials Northeast LLC (L16322) → Lake Ariel Quarry (3603196)**

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

## Controller and operator valid-time history

- **Herbert R Imbt Inc → Keystone Pavement & Construction Company Inc:** 1950-01-01 through 1986-11-12; derived from co-tenure at mine 3603196; source `msha-controller-operator-history`.
- **Koppers Company Inc → Keystone Pavement & Construction Company Inc:** 1986-11-13 through 1988-11-13; derived from co-tenure at mine 3603196; source `msha-controller-operator-history`.
- **Hanson PLC → Heidelberg Materials Northeast LLC:** 1988-11-14 through 2007-08-22; derived from co-tenure at mine 3603196; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Heidelberg Materials Northeast LLC:** 2007-08-23 through current/open; derived from co-tenure at mine 3603196; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 11
- 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 — 3 since 2021:** Accidents and injuries 5 historical accident/injury rows; 0 coded fatalities and 1 lost days across the published record.
2. **COMPLIANCE — 16 since 2021:** Violations and penalties 56 violation rows across the full record; 9 carry an S&S flag and $8,656 appears in current assessed amounts.
3. **HEALTH — 26 samples:** Occupational health samples 26 personal. 3 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 5K employee hours and 12 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 1 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 1 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 16 since 2021:** Inspections 50 inspection events and 720 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 56.4102 — Spillage and leakage.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4102
- **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 56.12008 — Insulation and fittings for power wires and cables.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **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 56.12030 — Correction of dangerous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12030
- **30 CFR 56.14112 — Construction and maintenance of guards.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14112
- **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 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **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 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.14109 — Unguarded conveyors with adjacent travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14109
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 5 rows; 2006-07-13 through 2023-09-15; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-04-09 through 2026-04-09; source ID `msha-addresses`
- **Assessed Violations:** 56 rows; 2002-06-06 through 2025-05-08; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2002-11-27 through 2002-11-27; source ID `msha-civil-penalty-dockets-decisions`
- **Controller and Operator History:** 4 rows; 1950-01-01 through 1988-11-14; source ID `msha-controller-operator-history`
- **Inspections:** 50 rows; 2000-08-09 through 2026-02-26; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 24 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 54 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; 2002-06-06 through 2024-05-30; source ID `msha-personal-health-samples`
- **Violations:** 56 rows; 2002-06-06 through 2025-05-08; 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/lake-ariel-quarry-3603196`
- JSON: `/api/v1/mines/lake-ariel-quarry-3603196`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3603196/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3603196/relationships`
- MCP resource: `mine://3603196/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`