# Relationship history for MSHA mine 1512941

Current hierarchy: **James River Coal Company → Bledsoe Coal Corp → No 60**

- 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:** Geo-Energy Ltd → No 60; 1980-08-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Deep Mining Company → No 60; 1981-06-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_operator:** Geo-Energy Ltd → Bledsoe Deep Mining Company; 1981-06-01 to 1985-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Paul J  Sturgill → No 60; 1983-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Elk Creek Coal Company Inc → No 60; 1985-04-01 to 1987-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Paul J  Sturgill → Big Elk Creek Coal Company Inc; 1985-04-01 to 1987-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → No 60; 1985-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Leeco Inc → No 60; 1987-09-28 to 1995-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Leeco Inc; 1987-09-28 to 1995-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Bledsoe Coal Corp → No 60; 1995-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → No 60; 1995-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bledsoe Coal Corp; 1995-06-20 to current/open; source msha-controller-operator-history