# Relationship history for MSHA mine 4400265

Current hierarchy: **Cordill Harvie → Harvie Cordill Coal Company → No 13 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:** Youngs Branch Coal Company → No 13 Mine; 1950-01-01 to 1970-10-31; source msha-controller-operator-history
- **controller_controls_mine:** B Ray  Thompson → No 13 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Youngs Branch Coal Company; 1950-01-01 to 1970-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Cordill Harvie → No 13 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Harvie Cordill Coal Company → No 13 Mine; 1970-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cordill Harvie → Harvie Cordill Coal Company; 1970-11-01 to current/open; source msha-controller-operator-history