# Relationship history for MSHA mine 4099989

Current hierarchy: **Campbell Tommy--James & Leslie Orange → Keener Hill Mining Company → Keener Hill No 1 Mine Or No 1 Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Keener Hill Mining Company → Keener Hill No 1 Mine Or No 1 Mine; 1978-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Campbell Tommy--James & Leslie Orange → Keener Hill No 1 Mine Or No 1 Mine; 1978-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Tommy--James & Leslie Orange → Keener Hill Mining Company; 1978-10-01 to current/open; source msha-controller-operator-history