# ADDCAR System 43 HWM Serial No. LV23043

- **MSHA mine ID:** 4801803
- **Status:** Abandoned
- **Type / commodity:** Surface / Coal (Bituminous)
- **Location:** Lincoln, WY
- **Operator:** ADDCAR Systems, LLC
- **Controller:** Big Bridge Big Dog PTY LTD
- **Public source rows linked:** 29
- **Source coverage:** 9 / 20
- **Generated:** 2026-10-18T09:31:49.615Z

## Current entity hierarchy

**Big Bridge Big Dog PTY LTD (0159281) → ADDCAR Systems, LLC (0055057) → ADDCAR System 43 HWM Serial No. LV23043 (4801803)**

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

## Controller and operator valid-time history

- **International Coal Group Inc (ICG) → ADDCAR Systems, LLC:** 2016-10-27 through 2011-06-14; derived from co-tenure at mine 4801803; source `msha-controller-operator-history`.
- **ADDCAR Holdings Pty.Ltd. → ADDCAR Systems, LLC:** 2016-10-27 through 2020-08-13; derived from co-tenure at mine 4801803; source `msha-controller-operator-history`.
- **Arch Resources Inc → ADDCAR Systems, LLC:** 2016-10-27 through 2014-02-11; derived from co-tenure at mine 4801803; source `msha-controller-operator-history`.
- **Big Bridge Big Dog PTY LTD → ADDCAR Systems, LLC:** 2020-08-14 through current/open; derived from co-tenure at mine 4801803; source `msha-controller-operator-history`.

- History rows: 4
- Typed edges: 9
- Interval anomalies: 2
- 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 — 0 since 2021:** Accidents and injuries 1 historical accident/injury rows; 0 coded fatalities and 0 lost days across the published record.
2. **COMPLIANCE — 0 since 2021:** Violations and penalties 6 violation rows across the full record; 1 carry an S&S flag and $474 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 3K employee hours and 8 summed average employees across reported subunits in the latest published quarter.
5. **LEGAL — 0 linked rows:** Contests, conferences and decisions 0 contested-violation rows, 0 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 5 inspection events and 230 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 77.502 — Electric equipment; examination, testing, and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-F/section-77.502
- **30 CFR 77.904 — Identification of circuit breakers.** (2 retained recent rows) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-J/section-77.904
- **30 CFR 77.404 — Machinery and equipment; operation and maintenance.** (1 retained recent row) — https://www.ecfr.gov/current/title-30/chapter-I/subchapter-O/part-77/subpart-E/section-77.404

## Source coverage

- **Accident, Injuries, and Illnesses:** 1 rows; 2017-04-11 through 2017-04-11; source ID `msha-accidents`
- **Addresses of Record:** 1 rows; 2017-10-31 through 2017-10-31; source ID `msha-addresses`
- **Assessed Violations:** 4 rows; 2017-02-15 through 2017-08-15; source ID `msha-assessed-violations`
- **Controller and Operator History:** 4 rows; 2016-10-27 through 2016-10-27; source ID `msha-controller-operator-history`
- **Inspections:** 5 rows; 2017-02-15 through 2017-08-21; source ID `msha-inspections`
- **Mine Employment and Production — Quarterly:** 5 rows; unknown through unknown; source ID `msha-mine-production-quarterly`
- **Mine Employment and Production — Yearly:** 2 rows; unknown through unknown; source ID `msha-mine-production-yearly`
- **Mines:** 1 rows; unknown through unknown; source ID `msha-mines`
- **Violations:** 6 rows; 2017-02-15 through 2017-08-21; 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/addcar-system-43-hwm-serial-no-lv23043-4801803`
- JSON: `/api/v1/mines/addcar-system-43-hwm-serial-no-lv23043-4801803`
- Silica records, units, sample status and quarterly means: `/api/v1/mines/4801803/silica` (snapshot year by default; `?year=all` for history; `&format=csv` for all matching rows)
- Relationship JSON: `/api/v1/mines/4801803/relationships`
- MCP resource: `mine://4801803/assessment`
- Complete Title 30 corpus: `/data/title30-sections.json`