# Relationship history for MSHA mine 4405252

Current hierarchy: **Bowman Ferdie → F & H Coal Corp → No 2 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:** Rash Russell → No 2 Mine; 1977-09-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Middle Creek Coal Corp → No 2 Mine; 1979-08-01 to 1981-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Rash Russell → Middle Creek Coal Corp; 1979-08-01 to 1981-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Bowman Ferdie → No 2 Mine; 1980-11-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** F & H Coal Corp → No 2 Mine; 1981-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowman Ferdie → F & H Coal Corp; 1981-01-27 to current/open; source msha-controller-operator-history