# Relationship history for MSHA mine 4502466

Current hierarchy: **Wayne  Ruden → Wren Commodities → Wren Commodities**

- 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:** Cowlitz Sand & Gravel Company → Wren Commodities; 1950-01-01 to 2024-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Cowlitz Valley Corp → Wren Commodities; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cowlitz Valley Corp → Cowlitz Sand & Gravel Company; 1950-01-01 to 2024-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Wren Commodities → Wren Commodities; 2024-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Ruden → Wren Commodities; 2024-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Ruden → Wren Commodities; 2024-07-18 to current/open; source msha-controller-operator-history