# Relationship history for MSHA mine 4604665

Current hierarchy: **Hanshaw Thomas F → Ann Jean Coal Corp → No 1 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:** Ann Jean Coal Company → No 1 Mine; 1975-06-01 to 1977-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Branham Howard → No 1 Mine; 1975-06-01 to 1977-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Branham Howard → Ann Jean Coal Company; 1975-06-01 to 1977-07-19; source msha-controller-operator-history
- **operator_operates_mine:** Ann Jean Coal Corp → No 1 Mine; 1977-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hanshaw Thomas F → No 1 Mine; 1977-07-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanshaw Thomas F → Ann Jean Coal Corp; 1977-07-20 to current/open; source msha-controller-operator-history