# Relationship history for MSHA mine 2401839

Current hierarchy: **Turley Windle → Cook Coal Company → Red Lodge Smith Site**

- 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:** Cook Coal Company → Red Lodge Smith Site; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Turley Windle → Red Lodge Smith Site; 1987-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Turley Windle → Cook Coal Company; 1987-03-01 to current/open; source msha-controller-operator-history