# Relationship history for MSHA mine 1512680

Current hierarchy: **Sunoco, Inc. → Whitaker Coal Corp → #45**

- 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:** Whitaker Coal Corp & Jack E Whitaker-Trustee → #45; 1950-01-01 to 1983-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Ray Coal Company → #45; 1981-01-01 to 1983-02-28; source msha-controller-operator-history
- **controller_controls_operator:** Whitaker Coal Corp & Jack E Whitaker-Trustee → Ray Coal Company; 1981-01-01 to 1983-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Whitaker Coal Corp → #45; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → #45; 1983-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Whitaker Coal Corp; 1983-03-01 to current/open; source msha-controller-operator-history