# Relationship history for MSHA mine 0404467

Current hierarchy: **Spoo R L & A W → Precision Lumber Company → Precision Products**

- 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

- **controller_controls_mine:** Spoo R L & A W → Precision Products; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Precision Lumber Company → Precision Products; 1980-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Spoo R L & A W → Precision Lumber Company; 1980-10-01 to current/open; source msha-controller-operator-history