# Kougarok Dredge Pit

- **MSHA mine ID:** 5000482
- **Status:** Intermittent
- **Type / commodity:** Surface / Gold Ore
- **Location:** Nome, AK
- **Operator:** N B Tweet & Sons LLC
- **Controller:** Bruce H  Tweet; Douglas B  Tweet
- **Public source rows linked:** 204
- **Source coverage:** 10 / 20
- **Generated:** 2026-10-13T11:26:59.401Z

## Current entity hierarchy

**Bruce H  Tweet; Douglas B  Tweet (0099295) → N B Tweet & Sons LLC (0117266) → Kougarok Dredge Pit (5000482)**

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

## Controller and operator valid-time history

- **N B Tweet & Sons → N B Tweet & Sons:** 1950-01-01 through 2011-02-07; derived from co-tenure at mine 5000482; source `msha-controller-operator-history`.
- **Bruce H  Tweet et al → N B Tweet & Sons LLC:** 2011-02-08 through current/open; derived from co-tenure at mine 5000482; source `msha-controller-operator-history`.
- **Douglas B  Tweet et al → N B Tweet & Sons LLC:** 2011-02-08 through current/open; derived from co-tenure at mine 5000482; 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 0 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 1 since 2021:** Violations and penalties 8 violation rows across the full record; 2 carry an S&S flag and $967 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 40 employee hours and 5 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 2 linked rows:** Contests, conferences and decisions 1 contested-violation rows, 1 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 — 6 since 2021:** Inspections 16 inspection events and 154 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 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 56.4104 — Combustible waste.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-C/section-56.4104
- **30 CFR 56.14101 — Brakes.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14101
- **30 CFR 56.14132 — Horns and backup alarms.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14132
- **30 CFR 56.14107 — Moving machine parts.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-K/part-56/subpart-M/section-56.14107
- **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 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

## Source coverage

- **Addresses of Record:** 1 rows; 2011-01-11 through 2011-01-11; source ID `msha-addresses`
- **Assessed Violations:** 8 rows; 2015-07-22 through 2023-09-12; source ID `msha-assessed-violations`
- **Civil Penalty Dockets and Decisions:** 1 rows; 2016-06-24 through 2016-06-24; source ID `msha-civil-penalty-dockets-decisions`
- **Contested Violations:** 1 rows; 2015-09-09 through 2015-09-09; source ID `msha-contested-violations`
- **Controller and Operator History:** 3 rows; 1950-01-01 through 2011-02-08; source ID `msha-controller-operator-history`
- **Inspections:** 16 rows; 2011-08-11 through 2026-09-02; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 126 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 39 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 8 rows; 2015-07-22 through 2023-09-12; 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/kougarok-dredge-pit-5000482`
- JSON: `/api/v1/mines/kougarok-dredge-pit-5000482`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/5000482/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/5000482/relationships`
- MCP resource: `mine://5000482/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`