# Relationship history for MSHA mine 1601603

Current hierarchy: **Donald W  Wood Jr; Pearce F  Wood → Wood Materials LLC → D-Ville Pit**

- 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:** Donald W  Wood Jr et al → D-Ville Pit; 2016-10-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Wood Materials LLC → D-Ville Pit; 2021-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald W  Wood Jr et al → Wood Materials LLC; 2021-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pearce F  Wood et al → Wood Materials LLC; 2021-06-17 to current/open; source msha-controller-operator-history