# Relationship history for MSHA mine 1601489

Current hierarchy: **Donald W  Wood Jr; Pearce F  Wood → Wood Dredging L.L.C. → Virginia Wood Dredge**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Wood Dredging L.L.C. → Virginia Wood Dredge; 2009-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pearce F  Wood et al → Virginia Wood Dredge; 2009-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pearce F  Wood et al → Wood Dredging L.L.C.; 2009-04-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald W  Wood Jr et al → Wood Dredging L.L.C.; 2009-04-09 to current/open; source msha-controller-operator-history