# Relationship history for MSHA mine 1516092

Current hierarchy: **Billy  Wright → Mine Rite Coal Company 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:** Billy  Wright → No 1; 1983-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** M S Hall Contracting Inc → No 1; 1987-06-01 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_mine:** Hall Mickey → No 1; 1987-06-01 to 1988-05-18; source msha-controller-operator-history
- **controller_controls_operator:** Hall Mickey → M S Hall Contracting Inc; 1987-06-01 to 1988-05-18; source msha-controller-operator-history
- **operator_operates_mine:** Mine Rite Coal Company Inc → No 1; 1988-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy  Wright → Mine Rite Coal Company Inc; 1988-05-19 to current/open; source msha-controller-operator-history