# Relationship history for MSHA mine 1512783

Current hierarchy: **Stewart Paul & Wayne Fields → F & S Contractors → 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:** Stewart Roger → No 1; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stewart Coal Company → No 1; 1981-03-01 to 1985-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Roger → Stewart Coal Company; 1981-03-01 to 1985-10-15; source msha-controller-operator-history
- **operator_operates_mine:** F & S Contractors → No 1; 1985-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stewart Paul & Wayne Fields → No 1; 1985-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stewart Paul & Wayne Fields → F & S Contractors; 1985-10-16 to current/open; source msha-controller-operator-history