# Relationship history for MSHA mine 4606128

Current hierarchy: **Mc Coy Jeffrey S → Supreme Energy Inc → 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

- **controller_controls_mine:** Usx Corp → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Taylor et al → No 1 Mine; 1978-04-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Fox Creek Mining Company Inc → No 1 Mine; 1980-04-01 to 1981-08-31; source msha-controller-operator-history
- **controller_controls_operator:** James  Taylor et al → Fox Creek Mining Company Inc; 1980-04-01 to 1981-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Coy  Taylor et al → Fox Creek Mining Company Inc; 1980-04-01 to 1981-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Fox Creek Mining Company Inc → No 1 Mine; 1981-09-01 to 1983-06-19; source msha-controller-operator-history
- **controller_controls_mine:** Burns Sam R → No 1 Mine; 1981-09-01 to 1983-06-19; source msha-controller-operator-history
- **controller_controls_operator:** Burns Sam R → Fox Creek Mining Company Inc; 1981-09-01 to 1983-06-19; source msha-controller-operator-history
- **operator_operates_mine:** United States Steel Mining Company Inc → No 1 Mine; 1983-06-20 to 1987-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1983-06-20 to 1987-02-12; source msha-controller-operator-history
- **operator_operates_mine:** Supreme Energy Inc → No 1 Mine; 1987-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Jeffrey S → No 1 Mine; 1987-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Jeffrey S → Supreme Energy Inc; 1987-02-13 to current/open; source msha-controller-operator-history