# Relationship history for MSHA mine 4606041

Current hierarchy: **Aughenbaugh William E → Hw-1 Corp → No 1 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Hw-1 Corp → No 1 Mine; 1979-12-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Holliday Rose → No 1 Mine; 1979-12-01 to 1980-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Holliday Rose → Hw-1 Corp; 1979-12-01 to 1980-04-30; source msha-controller-operator-history
- **operator_operates_mine:** Hw-1 Corp → No 1 Mine; 1980-05-01 to 1981-11-03; source msha-controller-operator-history
- **controller_controls_mine:** Amburgey Philip → No 1 Mine; 1980-05-01 to 1981-11-03; source msha-controller-operator-history
- **controller_controls_operator:** Amburgey Philip → Hw-1 Corp; 1980-05-01 to 1981-11-03; source msha-controller-operator-history
- **operator_operates_mine:** Hw-1 Corp → No 1 Mine; 1981-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Aughenbaugh William E → No 1 Mine; 1981-11-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aughenbaugh William E → Hw-1 Corp; 1981-11-04 to current/open; source msha-controller-operator-history