# Relationship history for MSHA mine 5001429

Current hierarchy: **Nelson Martin J & Scott Haskins → Alaska Mineral Services → Hi-Yu 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:** Alaska Mineral Services → Hi-Yu Mine; 1982-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Martin J & Scott Haskins → Hi-Yu Mine; 1982-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Martin J & Scott Haskins → Alaska Mineral Services; 1982-07-01 to current/open; source msha-controller-operator-history