# Relationship history for MSHA mine 5000328

Current hierarchy: **NVF Company → Alaska Gold Company → Dredge No 5**

- 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:** Alaska Gold Company → Dredge No 5; 1950-01-01 to 1979-11-25; source msha-controller-operator-history
- **controller_controls_mine:** U V Industries Inc → Dredge No 5; 1950-01-01 to 1979-11-25; source msha-controller-operator-history
- **controller_controls_operator:** U V Industries Inc → Alaska Gold Company; 1950-01-01 to 1979-11-25; source msha-controller-operator-history
- **operator_operates_mine:** Alaska Gold Company → Dredge No 5; 1979-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** NVF Company → Dredge No 5; 1979-11-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** NVF Company → Alaska Gold Company; 1979-11-26 to current/open; source msha-controller-operator-history