# Relationship history for MSHA mine 1515543

Current hierarchy: **Garnie E  Johnson; George  Johnson → Kinney Branch Coal Company Inc → No 1**

- 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:** George  Johnson et al → No 1; 1979-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kinney Branch Coal Company Inc → No 1; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George  Johnson et al → Kinney Branch Coal Company Inc; 1986-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garnie E  Johnson et al → Kinney Branch Coal Company Inc; 1986-03-01 to current/open; source msha-controller-operator-history