# Relationship history for MSHA mine 2902227

Current hierarchy: **Paul  Wood → WWC, Inc. → WWC SCREENING PLANT**

- 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:** Paul  Wood → WWC SCREENING PLANT; 1997-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** WWC, Inc. → WWC SCREENING PLANT; 2001-09-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul  Wood → WWC, Inc.; 2001-09-25 to current/open; source msha-controller-operator-history