# Relationship history for MSHA mine 0101032

Current hierarchy: **Invesco International Corp → Invesco International Corp Of Alabama → Invesco No 2 Strip**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Vulcan Energy Resources Corp → Invesco No 2 Strip; 1950-01-01 to 1976-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Pettyjohn Charles S → Invesco No 2 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pettyjohn Charles S → Vulcan Energy Resources Corp; 1950-01-01 to 1976-02-29; source msha-controller-operator-history
- **operator_operates_mine:** Invesco International Corp Of Alabama → Invesco No 2 Strip; 1976-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Invesco International Corp → Invesco No 2 Strip; 1976-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Invesco International Corp → Invesco International Corp Of Alabama; 1976-03-01 to current/open; source msha-controller-operator-history