# Relationship history for MSHA mine 1503990

Current hierarchy: **Haynes Van → P & T Coal Company → No 5 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

- **controller_controls_mine:** Haynes Van → No 5 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** A A R Coal Company → No 5 Mine; 1950-01-01 to 1971-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Tolliver Denver → No 5 Mine; 1950-01-01 to 1971-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Tolliver Denver → A A R Coal Company; 1950-01-01 to 1971-10-31; source msha-controller-operator-history
- **operator_operates_mine:** P & T Coal Company → No 5 Mine; 1971-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Haynes Van → P & T Coal Company; 1971-11-01 to current/open; source msha-controller-operator-history