# Relationship history for MSHA mine 4607921

Current hierarchy: **Clevenger Jerry D → C S C Fuels Inc → No 2 (Line Laurel)**

- 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:** Clevenger Jerry D → No 2 (Line Laurel); 1989-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lady H Corporation → No 2 (Line Laurel); 1990-01-19 to 1992-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Lady H Coal Company Inc → No 2 (Line Laurel); 1990-08-01 to 1990-09-25; source msha-controller-operator-history
- **controller_controls_operator:** Lady H Corporation → Lady H Coal Company Inc; 1990-08-01 to 1990-09-25; source msha-controller-operator-history
- **operator_operates_mine:** C S C Fuels Inc → No 2 (Line Laurel); 1990-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clevenger Jerry D → C S C Fuels Inc; 1990-09-26 to current/open; source msha-controller-operator-history