# House Springs Quarry (CS-73)

- **MSHA mine ID:** 2300106
- **Status:** Active
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Jefferson, MO
- **Operator:** Central Stone Company
- **Controller:** Riverstone Group
- **Public source rows linked:** 942
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Riverstone Group (M00233) → Central Stone Company (L00061) → House Springs Quarry (CS-73) (2300106)**

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

## Controller and operator valid-time history

- **Jack  Janssen → Des Peres Quarry Inc:** 1950-01-01 through 1988-06-12; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Janssen Bill M → House Springs Quarry & Materials Inc:** 1988-06-13 through 2012-12-17; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group et al → Bussen Quarries, Inc.:** 2012-12-18 through 2021-12-29; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Bussen Quarries Inc et al → Bussen Quarries, Inc.:** 2012-12-18 through 2021-12-29; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group → Bussen Quarries, Inc.:** 2012-12-18 through 2012-01-29; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group → Central Stone Company:** 2021-12-30 through 2022-10-19; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group et al → Bussen Quarries, Inc.:** 2022-10-20 through 2022-10-19; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Bussen Quarries Inc et al → Bussen Quarries, Inc.:** 2022-10-20 through 2022-10-19; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group → Bussen Quarries, Inc.:** 2022-10-20 through 2012-01-29; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group → Bussen Quarries, Inc.:** 2022-10-20 through 2021-12-29; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group → Bussen Quarries, Inc.:** 2022-10-20 through 2024-07-15; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.
- **Riverstone Group → Central Stone Company:** 2024-07-16 through current/open; derived from co-tenure at mine 2300106; source `msha-controller-operator-history`.

- History rows: 12
- Typed edges: 24
- Interval anomalies: 5
- 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 — 1 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 68 lost days across the published record.
2. **COMPLIANCE — 13 since 2021:** Violations and penalties 66 violation rows across the full record; 9 carry an S&S flag and $8,624 appears in current assessed amounts.
3. **HEALTH — 55 samples:** Occupational health samples 55 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 4K employee hours and 7 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 20 linked rows:** Contests, conferences and decisions 9 contested-violation rows, 9 civil-penalty docket/decision rows, and 2 conference records linked by issuance number.
6. **CONTRACTORS — 1 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 65 inspection events and 859 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 56.9300 — Berms or guardrails.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9300
- **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 56.14100 — Safety defects; examination, correction and records.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14100
- **30 CFR 56.4500 — Heat sources.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4500
- **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
- **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 56.14103 — Operators stations.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14103
- **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 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2015-10-06 through 2021-09-17; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2011-04-13 through 2011-04-13; source ID `msha-addresses`
- **Assessed Violations:** 66 rows; 2000-08-22 through 2025-08-21; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 9 rows; 2012-12-19 through 2026-04-21; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 2 rows; 2020-06-23 through 2025-03-18; source ID `msha-conferences`
- **Contested Violations:** 9 rows; 2011-07-19 through 2025-08-21; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 228 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 29 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 12 rows; 1950-01-01 through 2024-07-16; source ID `msha-controller-operator-history`
- **Inspections:** 65 rows; 2000-08-22 through 2026-06-01; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 315 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:** 55 rows; 2000-08-23 through 2025-09-30; source ID `msha-personal-health-samples`
- **Violations:** 66 rows; 2000-08-22 through 2025-08-21; 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/house-springs-quarry-cs-73-2300106`
- JSON: `/api/v1/mines/house-springs-quarry-cs-73-2300106`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/2300106/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/2300106/relationships`
- MCP resource: `mine://2300106/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`