# Relationship history for MSHA mine 1517298

Current hierarchy: **James River Coal Company → Bledsoe Coal Corporation → No 67**

- 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:** Williams Companies Inc → No 67; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leeco Inc → No 67; 1992-09-01 to 2000-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Leeco Inc; 1992-09-01 to 2000-09-20; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → No 67; 1995-06-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Coal Corporation → No 67; 2000-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bledsoe Coal Corporation; 2000-09-21 to current/open; source msha-controller-operator-history