# Relationship history for MSHA mine 1509956

Current hierarchy: **James Jack L → J & G Coal Company Inc → Mannington No 1**

- 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:** J & G Coal Company → Mannington No 1; 1976-06-01 to 1978-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Whitaker Jim → Mannington No 1; 1976-06-01 to 1978-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Whitaker Jim → J & G Coal Company; 1976-06-01 to 1978-05-09; source msha-controller-operator-history
- **operator_operates_mine:** J & G Coal Company Inc → Mannington No 1; 1978-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James Jack L → Mannington No 1; 1978-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Jack L → J & G Coal Company Inc; 1978-05-10 to current/open; source msha-controller-operator-history