# Relationship history for MSHA mine 4604509

Current hierarchy: **Coal Arbed → Hull Coal Corp → Mine No 1**

- 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:** Blankenship Hassel → Mine No 1; 1974-07-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Faye Coal Company → Mine No 1; 1975-01-01 to 1975-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Tommy Et Al → Mine No 1; 1975-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Tommy Et Al → Faye Coal Company; 1975-01-01 to 1975-02-24; source msha-controller-operator-history
- **operator_operates_mine:** Florida Fuel Company Inc → Mine No 1; 1975-02-25 to 1976-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Hassel → Florida Fuel Company Inc; 1975-02-25 to 1976-03-23; source msha-controller-operator-history
- **operator_operates_mine:** R & C Coal Company → Mine No 1; 1976-03-24 to 1976-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Cline Ray & Clark → Mine No 1; 1976-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cline Ray & Clark → R & C Coal Company; 1976-03-24 to 1976-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Hull Coal Corp → Mine No 1; 1976-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coal Arbed → Mine No 1; 1976-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coal Arbed → Hull Coal Corp; 1976-07-18 to current/open; source msha-controller-operator-history