# Relationship history for MSHA mine 0503684

Current hierarchy: **Galactic Resources Ltd → Summitville Consolidated Mining Company Inc → Summitville 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

- **controller_controls_mine:** Atlantic Richfield Company → Summitville Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Anaconda Minerals Company → Summitville Mine; 1981-05-01 to 1984-05-20; source msha-controller-operator-history
- **controller_controls_operator:** Atlantic Richfield Company → Anaconda Minerals Company; 1981-05-01 to 1984-05-20; source msha-controller-operator-history
- **operator_operates_mine:** Summitville Consolidated Mining Company Inc → Summitville Mine; 1984-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Galactic Resources Ltd → Summitville Mine; 1984-05-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Galactic Resources Ltd → Summitville Consolidated Mining Company Inc; 1984-05-21 to current/open; source msha-controller-operator-history