# Relationship history for MSHA mine 1515385

Current hierarchy: **Reffett Susan → Topmost Coal Inc → #1 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

- **controller_controls_mine:** George  Newsom → #1 Mine; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** G S & M Coal Company Inc → #1 Mine; 1985-10-01 to 1987-10-12; source msha-controller-operator-history
- **controller_controls_operator:** George  Newsom → G S & M Coal Company Inc; 1985-10-01 to 1987-10-12; source msha-controller-operator-history
- **controller_controls_mine:** Caudill Emery → #1 Mine; 1987-09-01 to 1990-03-12; source msha-controller-operator-history
- **operator_operates_mine:** G S & M Coal Company Inc → #1 Mine; 1987-10-13 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Caudill Emery → G S & M Coal Company Inc; 1987-10-13 to 1988-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Topmost Coal Inc → #1 Mine; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reffett Susan → #1 Mine; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reffett Susan → Topmost Coal Inc; 1988-07-01 to current/open; source msha-controller-operator-history