# Relationship history for MSHA mine 4404827

Current hierarchy: **Charles H  Gent → H B & B Equipment Company Inc → Mine #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

- **operator_operates_mine:** Fox Ten Mining Corp → Mine #1; 1977-08-01 to 1985-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Fox Charles O → Mine #1; 1977-08-01 to 1985-07-02; source msha-controller-operator-history
- **controller_controls_operator:** Fox Charles O → Fox Ten Mining Corp; 1977-08-01 to 1985-07-02; source msha-controller-operator-history
- **operator_operates_mine:** Fox Ten Mining Corp → Mine #1; 1985-07-03 to 1988-03-17; source msha-controller-operator-history
- **controller_controls_mine:** Anderson Morgan → Mine #1; 1985-07-03 to 1988-10-24; source msha-controller-operator-history
- **controller_controls_operator:** Anderson Morgan → Fox Ten Mining Corp; 1985-07-03 to 1988-03-17; source msha-controller-operator-history
- **operator_operates_mine:** H B & B Equipment Company Inc → Mine #1; 1988-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles H  Gent → Mine #1; 1988-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles H  Gent → H B & B Equipment Company Inc; 1988-03-18 to current/open; source msha-controller-operator-history