# Relationship history for MSHA mine 1511547

Current hierarchy: **Sunoco, Inc. → Whitaker Coal Corp → Perry County #2**

- 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:** Buchanan I H Iii → Perry County #2; 1977-08-01 to 1983-08-30; source msha-controller-operator-history
- **operator_operates_mine:** Long Branch Equipment Company Inc → Perry County #2; 1978-11-01 to 1983-08-30; source msha-controller-operator-history
- **controller_controls_operator:** Buchanan I H Iii → Long Branch Equipment Company Inc; 1978-11-01 to 1983-08-30; source msha-controller-operator-history
- **controller_controls_mine:** Sunoco, Inc. → Perry County #2; 1983-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Whitaker Coal Corp → Perry County #2; 1983-08-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Whitaker Coal Corp; 1983-08-31 to current/open; source msha-controller-operator-history