# Relationship history for MSHA mine 0500239

Current hierarchy: **Coors Adolph Company → Coors Energy Company → Bowie Mine**

- 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:** Juanita Coal & Coke Company → Bowie Mine; 1950-01-01 to 1974-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Bowie Robert F → Bowie Mine; 1950-01-01 to 1974-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Bowie Robert F → Juanita Coal & Coke Company; 1950-01-01 to 1974-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Coors Energy Company → Bowie Mine; 1974-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coors Adolph Company → Bowie Mine; 1974-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coors Adolph Company → Coors Energy Company; 1974-06-01 to current/open; source msha-controller-operator-history