# Relationship history for MSHA mine 1201432

Current hierarchy: **Will Gene C → Will Construction Company Inc → Oakland City Mine (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:** Will Construction Company Inc → Oakland City Mine (Strip); 1975-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Will Gene C Et Al → Oakland City Mine (Strip); 1975-08-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Will Gene C Et Al → Will Construction Company Inc; 1975-08-12 to current/open; source msha-controller-operator-history