# Relationship history for MSHA mine 4002424

Current hierarchy: **Dupre Gail F → Alpha B M B Energy Inc → 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:** Partin Richard L → No 1; 1975-04-02 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Partin Coal Company Inc → No 1; 1978-03-01 to 1979-04-04; source msha-controller-operator-history
- **controller_controls_operator:** Partin Richard L → Partin Coal Company Inc; 1978-03-01 to 1979-04-04; source msha-controller-operator-history
- **operator_operates_mine:** T E C Coal Inc → No 1; 1979-04-05 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Edwards Ronald G → No 1; 1979-04-05 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Edwards Ronald G → T E C Coal Inc; 1979-04-05 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Gipson James M → No 1; 1979-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Eagle Mining Company → No 1; 1979-11-15 to 1980-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Gipson James M → Eagle Mining Company; 1979-11-15 to 1980-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Alpha B M B Energy Inc → No 1; 1980-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dupre Gail F → No 1; 1980-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dupre Gail F → Alpha B M B Energy Inc; 1980-09-15 to current/open; source msha-controller-operator-history