# Relationship history for MSHA mine 4604736

Current hierarchy: **Larry A  Lough; Lewis E  Addair → Little Bear Mining Company Inc → No 4 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

- **operator_operates_mine:** Delaware Fuel Company → No 4 Mine; 1975-07-01 to 1988-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Coal Arbed → No 4 Mine; 1975-07-01 to 1988-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Coal Arbed → Delaware Fuel Company; 1975-07-01 to 1988-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Larry A  Lough et al → No 4 Mine; 1987-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Bear Mining Company Inc → No 4 Mine; 1988-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry A  Lough et al → Little Bear Mining Company Inc; 1988-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lewis E  Addair et al → Little Bear Mining Company Inc; 1988-02-25 to current/open; source msha-controller-operator-history