# Relationship history for MSHA mine 1512795

Current hierarchy: **Sunnyside Mines Inc → Sunnyside Kentucky Inc → #2 Loadout**

- 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:** Potter Gordon → #2 Loadout; 1979-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Marathon Coal Corp → #2 Loadout; 1981-03-01 to 1990-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Potter Gordon → Marathon Coal Corp; 1981-03-01 to 1990-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Sunnyside Kentucky Inc → #2 Loadout; 1990-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sunnyside Mines Inc → #2 Loadout; 1990-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunnyside Mines Inc → Sunnyside Kentucky Inc; 1990-05-01 to current/open; source msha-controller-operator-history