# Relationship history for MSHA mine 1800698

Current hierarchy: **Winner Brothers Coal Company Inc → Winner Brothers Coal Company Inc → Phillips' Mine Siding**

- 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:** Winner Brothers Coal Company Inc → Phillips' Mine Siding; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** NSM PLC → Phillips' Mine Siding; 1983-05-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Potomac Coal Company Inc → Phillips' Mine Siding; 1983-06-01 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Moran Charles → Phillips' Mine Siding; 1983-06-01 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Moran Charles → Potomac Coal Company Inc; 1983-06-01 to 1990-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Pbs Coals Inc → Phillips' Mine Siding; 1990-08-01 to 1993-01-27; source msha-controller-operator-history
- **controller_controls_operator:** NSM PLC → Pbs Coals Inc; 1990-08-01 to 1993-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Winner Brothers Coal Company Inc → Phillips' Mine Siding; 1993-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Winner Brothers Coal Company Inc → Winner Brothers Coal Company Inc; 1993-01-28 to current/open; source msha-controller-operator-history