# Algonquin Sand & Gravel

- **MSHA mine ID:** 1101117
- **Status:** Abandoned
- **Type / commodity:** Surface / Construction Sand and Gravel
- **Location:** Mchenry, IL
- **Operator:** Heidelberg Materials Midwest Agg, Inc.
- **Controller:** Heidelberg Materials AG
- **Public source rows linked:** 954
- **Source coverage:** 14 / 20
- **Generated:** 2026-10-17T06:17:15.228Z

## Current entity hierarchy

**Heidelberg Materials AG (M00004) → Heidelberg Materials Midwest Agg, Inc. (L16286) → Algonquin Sand & Gravel (1101117)**

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

## Controller and operator valid-time history

- **General Dynamics Corp → Hanson Material Service:** 1950-01-01 through 2006-06-15; derived from co-tenure at mine 1101117; source `msha-controller-operator-history`.
- **Hanson PLC → Hanson Material Service:** 2006-06-16 through 2007-08-22; derived from co-tenure at mine 1101117; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Hanson Material Service:** 2007-08-23 through 2021-01-31; derived from co-tenure at mine 1101117; source `msha-controller-operator-history`.
- **Heidelberg Materials AG → Heidelberg Materials Midwest Agg, Inc.:** 2021-02-01 through current/open; derived from co-tenure at mine 1101117; source `msha-controller-operator-history`.
- **Hanson PLC → Heidelberg Materials Midwest Agg, Inc.:** 2021-02-01 through 2007-08-22; derived from co-tenure at mine 1101117; source `msha-controller-operator-history`.

- History rows: 5
- Typed edges: 11
- Interval anomalies: 1
- 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 — 0 since 2021:** Accidents and injuries 10 historical accident/injury rows; 0 coded fatalities and 61 lost days across the published record.
2. **COMPLIANCE — 2 since 2021:** Violations and penalties 147 violation rows across the full record; 21 carry an S&S flag and $19,306 appears in current assessed amounts.
3. **HEALTH — 12 samples:** Occupational health samples 12 personal. 1 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 21K employee hours and 34 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 14 linked rows:** Contests, conferences and decisions 7 contested-violation rows, 7 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 4 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 — 3 since 2021:** Inspections 53 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 56.12008 — Insulation and fittings for power wires and cables.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12008
- **30 CFR 56.12028 — Testing grounding systems.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **30 CFR 56.11012 — Protection for openings around travelways.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-J/section-56.11012
- **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 56.12032 — 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 56.12023 — Guarding electrical connections and resistor grids.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12023

## Source coverage

- **Accident, Injuries, and Illnesses:** 10 rows; 2003-01-06 through 2018-03-13; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2022-11-09 through 2022-11-09; source ID `msha-addresses`
- **Assessed Violations:** 147 rows; 2000-03-22 through 2021-03-11; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 7 rows; 2012-08-23 through 2015-12-08; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 7 rows; 2010-07-26 through 2015-06-16; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 389 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 105 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 5 rows; 1950-01-01 through 2021-02-01; source ID `msha-controller-operator-history`
- **Inspections:** 53 rows; 2000-03-22 through 2022-11-09; 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:** 46 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:** 12 rows; 2003-10-15 through 2018-03-28; source ID `msha-personal-health-samples`
- **Violations:** 147 rows; 2000-03-22 through 2021-03-11; 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/algonquin-sand-gravel-1101117`
- JSON: `/api/v1/mines/algonquin-sand-gravel-1101117`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1101117/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1101117/relationships`
- MCP resource: `mine://1101117/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`