# Relationship history for MSHA mine 2601533

Current hierarchy: **Hughes Robert W → Austin Resources Inc → Hillside Shaft**

- 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:** Manhattan Consolidated Gold Mines Inc → Hillside Shaft; 1979-01-01 to 1981-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Angus Resources Inc → Hillside Shaft; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Angus Resources Inc → Manhattan Consolidated Gold Mines Inc; 1979-01-01 to 1981-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Hughes Robert W → Hillside Shaft; 1981-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Austin Resources Inc → Hillside Shaft; 1981-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hughes Robert W → Austin Resources Inc; 1981-07-22 to current/open; source msha-controller-operator-history