# Relationship history for MSHA mine 4605702

Current hierarchy: **Hawks Otis G → H & O Mining Company Inc → B 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

- **operator_operates_mine:** H & O Mining Company Inc → B Mine; 1977-11-01 to 1979-03-19; source msha-controller-operator-history
- **controller_controls_mine:** O'Dell Wilma Devaughan → B Mine; 1977-11-01 to 1979-03-19; source msha-controller-operator-history
- **controller_controls_operator:** O'Dell Wilma Devaughan → H & O Mining Company Inc; 1977-11-01 to 1979-03-19; source msha-controller-operator-history
- **operator_operates_mine:** H & O Mining Inc → B Mine; 1979-03-20 to 1979-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Hunt Vernon → B Mine; 1979-03-20 to 1979-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Hunt Vernon → H & O Mining Inc; 1979-03-20 to 1979-04-30; source msha-controller-operator-history
- **operator_operates_mine:** H & O Mining Company Inc → B Mine; 1979-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hawks Otis G → B Mine; 1979-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hawks Otis G → H & O Mining Company Inc; 1979-05-01 to current/open; source msha-controller-operator-history