# Relationship history for MSHA mine 2401227

Current hierarchy: **Don  Busby → Goldsil Mining & Milling Inc → Drumlummon Surface**

- 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:** White & Associates Inc → Drumlummon Surface; 1950-01-01 to 1980-02-29; source msha-controller-operator-history
- **controller_controls_mine:** White & Associates Inc → Drumlummon Surface; 1950-01-01 to 1980-02-29; source msha-controller-operator-history
- **controller_controls_operator:** White & Associates Inc → White & Associates Inc; 1950-01-01 to 1980-02-29; source msha-controller-operator-history
- **controller_controls_mine:** Don  Busby → Drumlummon Surface; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Goldsil Mining & Milling Inc → Drumlummon Surface; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Busby → Goldsil Mining & Milling Inc; 1980-03-01 to current/open; source msha-controller-operator-history