# Relationship history for MSHA mine 4601419

Current hierarchy: **Calvin  Cook → Falcon Energy Inc → Mine No 1 (2s1)**

- 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:** United States Steel Mining Company Inc → Mine No 1 (2s1); 1950-01-01 to 1987-08-09; source msha-controller-operator-history
- **controller_controls_mine:** Usx Corp → Mine No 1 (2s1); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1950-01-01 to 1987-08-09; source msha-controller-operator-history
- **operator_operates_mine:** Gary Enterprises Inc → Mine No 1 (2s1); 1987-08-10 to 1993-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Ted  Osborne  et al → Mine No 1 (2s1); 1987-08-10 to 1994-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Osborne  et al → Gary Enterprises Inc; 1987-08-10 to 1993-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Harman Branch Inc → Mine No 1 (2s1); 1993-08-13 to 1994-01-31; source msha-controller-operator-history
- **controller_controls_mine:** Charles Robert B → Mine No 1 (2s1); 1993-08-13 to 1994-01-31; source msha-controller-operator-history
- **controller_controls_operator:** Charles Robert B → Harman Branch Inc; 1993-08-13 to 1994-01-31; source msha-controller-operator-history
- **operator_operates_mine:** Gary Enterprises Inc → Mine No 1 (2s1); 1994-02-01 to 1994-02-02; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Osborne  et al → Gary Enterprises Inc; 1994-02-01 to 1994-02-02; source msha-controller-operator-history
- **operator_operates_mine:** Rock Consultants Inc → Mine No 1 (2s1); 1994-02-03 to 1995-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Winfrey Ron J → Mine No 1 (2s1); 1994-02-03 to 1995-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Winfrey Ron J → Rock Consultants Inc; 1994-02-03 to 1995-03-01; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Energy Inc → Mine No 1 (2s1); 1995-03-02 to 1997-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Dennis G  Cook → Mine No 1 (2s1); 1995-03-02 to 1997-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Dennis G  Cook → Falcon Energy Inc; 1995-03-02 to 1997-11-19; source msha-controller-operator-history
- **operator_operates_mine:** Falcon Energy Inc → Mine No 1 (2s1); 1997-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calvin  Cook → Mine No 1 (2s1); 1997-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calvin  Cook → Falcon Energy Inc; 1997-11-20 to current/open; source msha-controller-operator-history