# Relationship history for MSHA mine 1513487

Current hierarchy: **James River Coal Company → Bituminous-Laurel Mining Inc → No 2**

- 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:** Thornberry Rennie - Earl Et Al → No 2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kentucky Gem Coal Company Inc → No 2; 1982-05-01 to 1983-08-23; source msha-controller-operator-history
- **controller_controls_operator:** Thornberry Rennie - Earl Et Al → Kentucky Gem Coal Company Inc; 1982-05-01 to 1983-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Kaneb Services Inc → No 2; 1982-06-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous-Laurel Mining Inc → No 2; 1983-08-24 to 1985-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Kaneb Services Inc → Bituminous-Laurel Mining Inc; 1983-08-24 to 1985-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Leeco Inc → No 2; 1985-07-01 to 1995-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Williams Companies Inc → No 2; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Williams Companies Inc → Leeco Inc; 1985-07-01 to 1995-06-19; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous-Laurel Mining Inc → No 2; 1995-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James River Coal Company → No 2; 1995-06-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James River Coal Company → Bituminous-Laurel Mining Inc; 1995-06-20 to current/open; source msha-controller-operator-history