# Relationship history for MSHA mine 3400784

Current hierarchy: **Harrison William → Panama Coal Corp → Molthan 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:** Okar Energy Inc → Molthan Strip; 1950-01-01 to 1976-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Kathol Gerold J → Molthan Strip; 1950-01-01 to 1976-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Kathol Gerold J → Okar Energy Inc; 1950-01-01 to 1976-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Panama Coal Corp → Molthan Strip; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harrison William → Molthan Strip; 1976-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harrison William → Panama Coal Corp; 1976-04-01 to current/open; source msha-controller-operator-history