# Relationship history for MSHA mine 4405237

Current hierarchy: **Cheyenne Mining Corp → Blackfoot Mining Inc → No 3 Strip**

- 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:** Evening Star Coal Corp → No 3 Strip; 1979-04-01 to 1985-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Looney Roy Et Al → No 3 Strip; 1979-04-01 to 1985-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Looney Roy Et Al → Evening Star Coal Corp; 1979-04-01 to 1985-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Cheyenne Mining Corp → No 3 Strip; 1984-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Evening Star Coal Corp → No 3 Strip; 1985-03-11 to 1985-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Bevins P F → No 3 Strip; 1985-03-11 to 1985-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Bevins P F → Evening Star Coal Corp; 1985-03-11 to 1985-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Evening Star Coal Corp → No 3 Strip; 1985-08-09 to 1986-10-15; source msha-controller-operator-history
- **controller_controls_mine:** Tolbert P  Mullins → No 3 Strip; 1985-08-09 to 1986-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Tolbert P  Mullins → Evening Star Coal Corp; 1985-08-09 to 1986-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Campbell Creek Coal Company Inc → No 3 Strip; 1986-10-16 to 1987-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Johnson Ronald R → No 3 Strip; 1986-10-16 to 1987-08-02; source msha-controller-operator-history
- **controller_controls_operator:** Johnson Ronald R → Campbell Creek Coal Company Inc; 1986-10-16 to 1987-08-02; source msha-controller-operator-history
- **operator_operates_mine:** Blackfoot Mining Inc → No 3 Strip; 1987-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cheyenne Mining Corp → Blackfoot Mining Inc; 1987-08-03 to current/open; source msha-controller-operator-history