# Relationship history for MSHA mine 1511279

Current hierarchy: **White Ulys P & Edward V Cole → Thacker Energy Corp → No 1 (D)**

- 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:** Smith Daniel F → No 1 (D); 1977-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky Heritage Coal Inc → No 1 (D); 1978-05-01 to 1979-06-04; source msha-controller-operator-history
- **controller_controls_operator:** Smith Daniel F → Kentucky Heritage Coal Inc; 1978-05-01 to 1979-06-04; source msha-controller-operator-history
- **operator_operates_mine:** Thacker Energy Corp → No 1 (D); 1979-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** White Ulys P & Edward V Cole → No 1 (D); 1979-06-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** White Ulys P & Edward V Cole → Thacker Energy Corp; 1979-06-05 to current/open; source msha-controller-operator-history