# Relationship history for MSHA mine 1517223

Current hierarchy: **Roger D  Barnette → Last Gasp Coal Corp → No 3**

- 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:** Rogers K C → No 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** K C Rogers Coal Company Inc → No 3; 1992-04-01 to 1994-06-20; source msha-controller-operator-history
- **controller_controls_operator:** Rogers K C → K C Rogers Coal Company Inc; 1992-04-01 to 1994-06-20; source msha-controller-operator-history
- **controller_controls_mine:** Roger D  Barnette → No 3; 1994-04-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chestnut Ridge Coal Company Inc → No 3; 1994-06-21 to 1996-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Boyd Rocky → No 3; 1994-06-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Boyd Rocky → Chestnut Ridge Coal Company Inc; 1994-06-21 to 1996-04-21; source msha-controller-operator-history
- **operator_operates_mine:** Last Gasp Coal Corp → No 3; 1996-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger D  Barnette → Last Gasp Coal Corp; 1996-04-22 to current/open; source msha-controller-operator-history