# Relationship history for MSHA mine 1202169

Current hierarchy: **Rick  Risinger → Coal Inc → Coal Inc**

- 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:** Black Diamond Coal Company Inc → Coal Inc; 1994-09-01 to 1995-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Whitehead Richard H → Coal Inc; 1994-09-01 to 1995-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Whitehead Richard H → Black Diamond Coal Company Inc; 1994-09-01 to 1995-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Coal Inc → Coal Inc; 1995-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Risinger → Coal Inc; 1995-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Risinger → Coal Inc; 1995-05-18 to current/open; source msha-controller-operator-history