# Rapid City Quarry & Mill

- **MSHA mine ID:** 3900020
- **Status:** Active
- **Type / commodity:** Surface / Lime
- **Location:** Pennington, SD
- **Operator:** Pete Lien & Sons Inc
- **Controller:** Pete Lien & Sons Inc
- **Public source rows linked:** 6,327
- **Source coverage:** 16 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Pete Lien & Sons Inc (M00359) → Pete Lien & Sons Inc (L00438) → Rapid City Quarry & Mill (3900020)**

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

## Controller and operator valid-time history

- **Pete Lien & Sons Inc → Pete Lien & Sons Inc:** 1950-01-01 through current/open; derived from co-tenure at mine 3900020; source `msha-controller-operator-history`.

- History rows: 1
- Typed edges: 3
- 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 — 28 since 2021:** Accidents and injuries 174 historical accident/injury rows; 0 coded fatalities and 3,395 lost days across the published record.
2. **COMPLIANCE — 171 since 2021:** Violations and penalties 794 violation rows across the full record; 182 carry an S&S flag and $314,242 appears in current assessed amounts.
3. **HEALTH — 279 samples:** Occupational health samples 278 personal; 1 area. 5 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 55K employee hours and 96 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 209 linked rows:** Contests, conferences and decisions 95 contested-violation rows, 104 civil-penalty docket/decision rows, and 10 conference records linked by issuance number.
6. **CONTRACTORS — 32 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 — 18 since 2021:** Inspections 111 inspection events and 5K 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 46.5 — New miner training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.5
- **30 CFR 46.12 — Responsibility for independent contractor training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.12
- **30 CFR 46.11 — Site-specific hazard awareness training.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.11
- **30 CFR 56.12028 — Testing grounding systems.** (3 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-K/section-56.12028
- **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 56.4130 — 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 56.12032 — 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 56.4402 — Safety can use.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4402
- **30 CFR 56.17001 — Illumination of surface working areas.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-P/section-56.17001
- **30 CFR 47.41 — Requirement for container labels.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-47/subpart-E/section-47.41

## Source coverage

- **Accident, Injuries, and Illnesses:** 174 rows; 2000-02-21 through 2026-07-01; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 1979-03-12 through 1979-03-12; source ID `msha-addresses`
- **Metal and Nonmetal Area Samples:** 1 rows; 2013-02-26 through 2013-02-26; source ID `msha-area-samples`
- **Assessed Violations:** 791 rows; 2000-08-08 through 2026-04-15; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 104 rows; 2001-10-02 through 2019-06-19; source ID `msha-civil-penalty-dockets-decisions`
- **Conferences:** 10 rows; 2002-09-10 through 2021-03-30; source ID `msha-conferences`
- **Contested Violations:** 95 rows; 2008-11-24 through 2019-01-08; source ID `msha-contested-violations`
- **Contractor Employment and Production — Quarterly:** 2,984 rows; unknown through unknown; source ID `msha-contractor-production-quarterly`
- **Contractor Employment and Production — Yearly:** 593 rows; unknown through unknown; source ID `msha-contractor-production-yearly`
- **Controller and Operator History:** 1 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 111 rows; 2000-08-08 through 2026-04-02; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 310 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 79 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:** 278 rows; 2003-01-29 through 2025-12-15; source ID `msha-personal-health-samples`
- **Violations:** 794 rows; 2000-08-08 through 2026-04-15; 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/rapid-city-quarry-mill-3900020`
- JSON: `/api/v1/mines/rapid-city-quarry-mill-3900020`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3900020/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3900020/relationships`
- MCP resource: `mine://3900020/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`