# Relationship history for MSHA mine 2902136

Current hierarchy: **Paul  Wood → WWC INC → WWC  #2567**

- 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:** Ruidoso Paving Company Inc → WWC  #2567; 1994-08-01 to 2000-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Tom  White → WWC  #2567; 1994-08-01 to 2000-09-30; source msha-controller-operator-history
- **controller_controls_operator:** Tom  White → Ruidoso Paving Company Inc; 1994-08-01 to 2000-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Paul  Wood → WWC  #2567; 1997-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** WWC INC → WWC  #2567; 2000-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Wood → WWC INC; 2000-10-01 to current/open; source msha-controller-operator-history