# Relationship history for MSHA mine 4002958

Current hierarchy: **Sanders William Paul → Southern Appalachian Mining Corp → 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

- **operator_operates_mine:** Southern Appalachian Mining Corp → No 1; 1987-10-01 to 1988-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Warren Greg → No 1; 1987-10-01 to 1988-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Warren Greg → Southern Appalachian Mining Corp; 1987-10-01 to 1988-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Southern Appalachian Mining Corp → No 1; 1988-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sanders William Paul → No 1; 1988-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sanders William Paul → Southern Appalachian Mining Corp; 1988-07-15 to current/open; source msha-controller-operator-history