# Hot Springs Quarry

- **MSHA mine ID:** 3900180
- **Status:** Intermittent
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Pennington, SD
- **Operator:** Simon Contractors
- **Controller:** Colas S A
- **Public source rows linked:** 559
- **Source coverage:** 15 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Colas S A (M03183) → Simon Contractors (L14011) → Hot Springs Quarry (3900180)**

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

## Controller and operator valid-time history

- **Northwestern Engineering Company → Hills Materials Company:** 1950-01-01 through 1998-10-15; derived from co-tenure at mine 3900180; source `msha-controller-operator-history`.
- **CRH PLC → Hills Materials Company:** 1998-10-16 through 2015-03-29; derived from co-tenure at mine 3900180; source `msha-controller-operator-history`.
- **Colas S A → Simon Contractors:** 2015-03-30 through current/open; derived from co-tenure at mine 3900180; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 9
- 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: 2026-10-13T11:19:05.459773+00:00.

## Assessment signals

1. **SAFETY — 0 since 2021:** Accidents and injuries 3 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 41 violation rows across the full record; 4 carry an S&S flag and $4,653 appears in current assessed amounts.
3. **HEALTH — 9 samples:** Occupational health samples 9 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 2K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 53 linked rows:** Contests, conferences and decisions 19 contested-violation rows, 20 civil-penalty docket/decision rows, and 14 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 — 4 since 2021:** Inspections 44 inspection events and 500 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 56.1000 — Notification of commencement of operations and closing of mines.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-A/section-56.1000
- **30 CFR 56.14107 — Moving machine parts.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **30 CFR 56.3200 — Correction of hazardous conditions.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-B/section-56.3200
- **30 CFR 50.30 — Preparation and submission of MSHA Form 7000-2—Quarterly Employment and Coal Production Report.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-I/part-50/subpart-D/section-50.30
- **30 CFR 56.14132 — Horns and backup alarms.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.14207 — Parking procedures for unattended equipment.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14207
- **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 56.18002 — Examination of working places.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-Q/section-56.18002
- **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 56.11001 — 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:** 3 rows; 2002-02-06 through 2006-02-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2024-05-09 through 2024-05-09; source ID `msha-addresses`
- **Assessed Violations:** 41 rows; 2000-07-12 through 2024-06-17; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 20 rows; 2003-06-25 through 2011-12-20; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 14 rows; 2000-11-28 through 2005-03-17; source ID `msha-conferences`
- **Contested Violations:** 19 rows; 2004-04-15 through 2010-08-20; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 75 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 20 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2015-03-30; source ID `msha-controller-operator-history`
- **Inspections:** 44 rows; 2000-01-20 through 2026-03-12; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 236 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 32 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:** 9 rows; 2004-01-14 through 2010-02-18; source ID `msha-personal-health-samples`
- **Violations:** 41 rows; 2000-07-12 through 2024-06-17; 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/hot-springs-quarry-3900180`
- JSON: `/api/v1/mines/hot-springs-quarry-3900180`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3900180/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3900180/relationships`
- MCP resource: `mine://3900180/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`