# Relationship history for MSHA mine 4801803

Current hierarchy: **Big Bridge Big Dog PTY LTD → ADDCAR Systems, LLC → ADDCAR System 43 HWM Serial No. LV23043**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** International Coal Group Inc (ICG) → ADDCAR System 43 HWM Serial No. LV23043; 2004-10-27 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → ADDCAR System 43 HWM Serial No. LV23043; 2011-06-15 to 2014-02-11; source msha-controller-operator-history
- **controller_controls_mine:** ADDCAR Holdings Pty.Ltd. → ADDCAR System 43 HWM Serial No. LV23043; 2014-02-12 to 2020-08-13; source msha-controller-operator-history
- **operator_operates_mine:** ADDCAR Systems, LLC → ADDCAR System 43 HWM Serial No. LV23043; 2016-10-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → ADDCAR Systems, LLC; 2016-10-27 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_operator:** ADDCAR Holdings Pty.Ltd. → ADDCAR Systems, LLC; 2016-10-27 to 2020-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → ADDCAR Systems, LLC; 2016-10-27 to 2014-02-11; source msha-controller-operator-history
- **controller_controls_mine:** Big Bridge Big Dog PTY LTD → ADDCAR System 43 HWM Serial No. LV23043; 2020-08-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Big Bridge Big Dog PTY LTD → ADDCAR Systems, LLC; 2020-08-14 to current/open; source msha-controller-operator-history