# Parker Pit

- **MSHA mine ID:** 3900230
- **Status:** Abandoned
- **Type / commodity:** Surface / Crushed, Broken Limestone NEC
- **Location:** Minnehaha, SD
- **Operator:** Knife River-South Dakota
- **Controller:** Knife River Corporation
- **Public source rows linked:** 108
- **Source coverage:** 11 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Knife River Corporation (0176802) → Knife River-South Dakota (L15666) → Parker Pit (3900230)**

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

## Controller and operator valid-time history

- **Gerald P  Sweetman → Knife River-South Dakota:** 1950-01-01 through 2018-10-03; derived from co-tenure at mine 3900230; source `msha-controller-operator-history`.
- **MDU Resources Group Inc → Knife River-South Dakota:** 2018-10-04 through 2023-05-31; derived from co-tenure at mine 3900230; source `msha-controller-operator-history`.
- **Knife River Corporation → Knife River-South Dakota:** 2023-06-01 through current/open; derived from co-tenure at mine 3900230; source `msha-controller-operator-history`.

- History rows: 3
- Typed edges: 7
- 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 86 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 6 violation rows across the full record; 2 carry an S&S flag and $5,400 appears in current assessed amounts.
3. **HEALTH — 0 samples:** Occupational health samples No published samples. 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 6 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 4 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 3 civil-penalty docket/decision rows, and 0 conference records linked by issuance number.
6. **CONTRACTORS — 0 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 — 0 since 2021:** Inspections 10 inspection events and 118 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 46.3 — Training plans.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-H/part-46/section-46.3
- **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 56.4201 — Inspection.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4201
- **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
- **30 CFR 56.9304 — Unstable ground.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9304
- **30 CFR 56.9301 — Dump site restraints.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-H/section-56.9301

## Source coverage

- **Accident, Injuries, and Illnesses:** 3 rows; 2000-02-07 through 2002-05-07; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2026-10-05 through 2026-10-05; source ID `msha-addresses`
- **Assessed Violations:** 6 rows; 2000-03-02 through 2009-10-06; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 3 rows; 2001-06-04 through 2010-10-18; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2009-10-06 through 2009-10-06; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 1950-01-01; source ID `msha-controller-operator-history`
- **Inspections:** 10 rows; 2000-03-02 through 2020-07-29; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 60 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 14 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 6 rows; 2000-03-02 through 2009-10-06; 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/parker-pit-3900230`
- JSON: `/api/v1/mines/parker-pit-3900230`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/3900230/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/3900230/relationships`
- MCP resource: `mine://3900230/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`