# Relationship history for MSHA mine 1502254

Current hierarchy: **Howard Grant F → Red Bud Colleries Inc → No 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

- **operator_operates_mine:** Eastover Mining Company → No 2; 1950-01-01 to 1980-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Duke Power Company → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Duke Power Company → Eastover Mining Company; 1950-01-01 to 1980-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Howard Grant F → No 2; 1978-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Red Bud Colleries Inc → No 2; 1980-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard Grant F → Red Bud Colleries Inc; 1980-10-02 to current/open; source msha-controller-operator-history