# Relationship history for MSHA mine 1202416

Current hierarchy: **David Michael  Jamison; Petri E Koivula → Eagle Highwall Mining Systems, LLC → ADDCAR Systems 20 HWM Serial No. 23020**

- 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 Systems 20 HWM Serial No. 23020; 2004-10-27 to 2011-06-14; source msha-controller-operator-history
- **operator_operates_mine:** ADDCAR Systems, LLC → ADDCAR Systems 20 HWM Serial No. 23020; 2008-12-03 to 2022-06-23; source msha-controller-operator-history
- **controller_controls_operator:** International Coal Group Inc (ICG) → ADDCAR Systems, LLC; 2008-12-03 to 2011-06-14; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → ADDCAR Systems 20 HWM Serial No. 23020; 2011-06-15 to 2014-02-11; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → ADDCAR Systems, LLC; 2011-06-15 to 2014-02-11; source msha-controller-operator-history
- **controller_controls_mine:** ADDCAR Holdings Pty.Ltd. → ADDCAR Systems 20 HWM Serial No. 23020; 2014-02-12 to 2020-08-13; source msha-controller-operator-history
- **controller_controls_operator:** ADDCAR Holdings Pty.Ltd. → ADDCAR Systems, LLC; 2014-02-12 to 2020-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Big Bridge Big Dog PTY LTD → ADDCAR Systems 20 HWM Serial No. 23020; 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 2022-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Petri E Koivula et al → ADDCAR Systems 20 HWM Serial No. 23020; 2021-05-26 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Petri E Koivula et al → ADDCAR Systems 20 HWM Serial No. 23020; 2022-06-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Highwall Mining Systems, LLC → ADDCAR Systems 20 HWM Serial No. 23020; 2022-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula et al → Eagle Highwall Mining Systems, LLC; 2022-06-24 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_operator:** John  McNab et al → Eagle Highwall Mining Systems, LLC; 2022-06-24 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Jamison et al → Eagle Highwall Mining Systems, LLC; 2022-06-24 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula et al → Eagle Highwall Mining Systems, LLC; 2022-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Michael  Jamison et al → Eagle Highwall Mining Systems, LLC; 2022-06-24 to current/open; source msha-controller-operator-history