# Relationship history for MSHA mine 4604306

Current hierarchy: **Fields Glenn E → G & F Coal Company 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:** Coal Arbed → No 1 Mine; 1973-12-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Indian Ridge Coal Co → No 1 Mine; 1974-01-01 to 1976-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Coal Arbed → Indian Ridge Coal Co; 1974-01-01 to 1976-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Hanover Fuel Company → No 1 Mine; 1976-02-08 to 1976-04-14; source msha-controller-operator-history
- **controller_controls_mine:** Church Tom → No 1 Mine; 1976-02-08 to 1976-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Church Tom → Hanover Fuel Company; 1976-02-08 to 1976-04-14; source msha-controller-operator-history
- **operator_operates_mine:** G & F Coal Company Inc → No 1 Mine; 1976-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fields Glenn E → No 1 Mine; 1976-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fields Glenn E → G & F Coal Company Inc; 1976-04-15 to current/open; source msha-controller-operator-history