# Relationship history for MSHA mine 1202511

Current hierarchy: **David Michael  Jamison; Petri E Koivula → Eagle Highwall Mining Systems, LLC → ADDCAR System 6 HWM Serial No. LV23006**

- 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:** Mike  Jamison et al → ADDCAR System 6 HWM Serial No. LV23006; 2021-05-26 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_mine:** Petri E Koivula et al → ADDCAR System 6 HWM Serial No. LV23006; 2022-06-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Highwall Mining Systems, LLC → ADDCAR System 6 HWM Serial No. LV23006; 2022-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Jamison et al → Eagle Highwall Mining Systems, LLC; 2022-09-22 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_operator:** John  McNab et al → Eagle Highwall Mining Systems, LLC; 2022-09-22 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula et al → Eagle Highwall Mining Systems, LLC; 2022-09-22 to 2022-06-05; source msha-controller-operator-history
- **controller_controls_operator:** Petri E Koivula et al → Eagle Highwall Mining Systems, LLC; 2022-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David Michael  Jamison et al → Eagle Highwall Mining Systems, LLC; 2022-09-22 to current/open; source msha-controller-operator-history