# Relationship history for MSHA mine 1201833

Current hierarchy: **Siegel John J Jr → Green Bay Fuels Inc → Wahl Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Siegel John J Jr → Wahl Mine; 1981-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Green Bay Fuels Inc → Wahl Mine; 1981-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Siegel John J Jr → Green Bay Fuels Inc; 1981-03-01 to current/open; source msha-controller-operator-history