# Relationship history for MSHA mine 1000134

Current hierarchy: **Hohne Fred → Diamond Hill Mining Company → Comeback 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:** Goldsil Mining & Milling Inc → Comeback Mine; 1950-01-01 to 1985-06-02; source msha-controller-operator-history
- **controller_controls_mine:** Don  Busby → Comeback Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Don  Busby → Goldsil Mining & Milling Inc; 1950-01-01 to 1985-06-02; source msha-controller-operator-history
- **operator_operates_mine:** Diamond Hill Mining Company → Comeback Mine; 1985-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hohne Fred → Comeback Mine; 1985-06-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hohne Fred → Diamond Hill Mining Company; 1985-06-03 to current/open; source msha-controller-operator-history