# Relationship history for MSHA mine 2301691

Current hierarchy: **Adrian Tony → Jeff-Cole Quarries Inc → Marion Pit**

- 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:** William E  Witaker → Marion Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Adrian Tony → Marion Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** West Lake Quarry & Material Company → Marion Pit; 1978-03-09 to 1980-10-06; source msha-controller-operator-history
- **controller_controls_operator:** William E  Witaker → West Lake Quarry & Material Company; 1978-03-09 to 1980-10-06; source msha-controller-operator-history
- **operator_operates_mine:** Jeff-Cole Quarries Inc → Marion Pit; 1980-10-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adrian Tony → Jeff-Cole Quarries Inc; 1980-10-07 to current/open; source msha-controller-operator-history