# Johnson County Aggregates

- **MSHA mine ID:** 1400068
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Johnson, KS
- **Operator:** Holliday Sand & Gravel Company, Inc.
- **Controller:** CRH PLC
- **Public source rows linked:** 2,071
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**CRH PLC (M06183) → Holliday Sand & Gravel Company, Inc. (0094885) → Johnson County Aggregates (1400068)**

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

## Controller and operator valid-time history

- **W E  Thomson Jr → Deitz Hill Development Company:** 1950-01-01 through 1984-12-14; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **Ronald H  Stanley → Cedar Creek Quarries:** 1984-12-15 through 1992-01-01; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **Ash Grove Cement Company et al → Johnson County Aggregates LLC:** 1992-01-02 through 2012-05-31; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **Clarkson Construction Company et al → Johnson County Aggregates LLC:** 1992-01-02 through 2012-05-31; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **Ash Grove Cement Company → Johnson County Aggregates LLC:** 2012-06-01 through 2018-06-20; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **CRH PLC → Johnson County Aggregates LLC:** 2018-06-21 through 2026-04-07; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **Ash Grove Cement Company → Holliday Sand & Gravel Company, Inc.:** 2026-04-08 through 2018-06-20; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.
- **CRH PLC → Holliday Sand & Gravel Company, Inc.:** 2026-04-08 through current/open; derived from co-tenure at mine 1400068; source `msha-controller-operator-history`.

- History rows: 8
- Typed edges: 18
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 2 since 2021:** Accidents and injuries 20 historical accident/injury rows; 0 coded fatalities and 155 lost days across the published record.
2. **COMPLIANCE — 28 since 2021:** Violations and penalties 229 violation rows across the full record; 54 carry an S&S flag and $68,373 appears in current assessed amounts.
3. **HEALTH — 48 samples:** Occupational health samples 48 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 22K employee hours and 36 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 75 linked rows:** Contests, conferences and decisions 7 contested-violation rows, 9 civil-penalty docket/decision rows, and 59 conference records linked by issuance number.
6. **CONTRACTORS — 5 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 77 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 56.4101 — 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 56.14100 — Safety defects; examination, correction and records.** (4 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **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 56.15006 — Protective equipment and clothing for hazards and irritants.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-N/section-56.15006
- **30 CFR 56.4130 — Electric substations and liquid storage facilities.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4130
- **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 56.14205 — Machinery, equipment, and tools.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14205
- **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

## Source coverage

- **Accident, Injuries, and Illnesses:** 20 rows; 2000-01-24 through 2026-03-03; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2020-05-12 through 2020-05-12; source ID `msha-addresses`
- **Assessed Violations:** 229 rows; 2000-01-19 through 2026-05-07; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 9 rows; 2003-12-23 through 2011-02-02; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 59 rows; 2002-02-15 through 2007-11-30; source ID `msha-conferences`
- **Contested Violations:** 7 rows; 2006-10-24 through 2026-05-05; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 827 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 181 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 8 rows; 1950-01-01 through 2026-04-08; source ID `msha-controller-operator-history`
- **Inspections:** 77 rows; 2000-01-19 through 2026-05-04; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 298 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 77 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:** 48 rows; 2004-03-03 through 2025-04-22; source ID `msha-personal-health-samples`
- **Violations:** 229 rows; 2000-01-19 through 2026-05-07; 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/johnson-county-aggregates-1400068`
- JSON: `/api/v1/mines/johnson-county-aggregates-1400068`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/1400068/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/1400068/relationships`
- MCP resource: `mine://1400068/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`