# Relationship history for MSHA mine 4405145

Current hierarchy: **Blaine Scott  White → White Stone Company → Plant No 2**

- 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:** Quality Quarry Inc → Plant No 2; 1978-03-09 to 1982-08-17; source msha-controller-operator-history
- **controller_controls_mine:** Quillen Paul R → Plant No 2; 1978-03-09 to 1982-08-17; source msha-controller-operator-history
- **controller_controls_operator:** Quillen Paul R → Quality Quarry Inc; 1978-03-09 to 1982-08-17; source msha-controller-operator-history
- **operator_operates_mine:** White Stone Company → Plant No 2; 1982-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Blaine Scott  White → Plant No 2; 1982-08-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blaine Scott  White → White Stone Company; 1982-08-18 to current/open; source msha-controller-operator-history