# Relationship history for MSHA mine 0503031

Current hierarchy: **Anfield Energy Inc → Highbury Resources Inc. → C-JD-7**

- 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:** Kelmine Corp → C-JD-7; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Colorado Kenworth Inc → C-JD-7; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colorado Kenworth Inc → Kelmine Corp; 1950-01-01 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Commonwealth Edison Company → C-JD-7; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cotter Corp → C-JD-7; 1979-11-01 to 2000-02-17; source msha-controller-operator-history
- **controller_controls_operator:** Commonwealth Edison Company → Cotter Corp; 1979-11-01 to 2000-02-17; source msha-controller-operator-history
- **operator_operates_mine:** Cotter Corporation → C-JD-7; 2000-02-18 to 2025-06-24; source msha-controller-operator-history
- **controller_controls_mine:** General Atomics Uranium Resources → C-JD-7; 2000-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** General Atomics Uranium Resources → Cotter Corporation; 2000-02-18 to 2025-06-24; source msha-controller-operator-history
- **operator_operates_mine:** Highbury Resources Inc. → C-JD-7; 2025-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Anfield Energy Inc → C-JD-7; 2025-06-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anfield Energy Inc → Highbury Resources Inc.; 2025-06-25 to current/open; source msha-controller-operator-history