# Relationship history for MSHA mine 5001501

Current hierarchy: **Ahtna Inc → AAA Valley Gravel → AAA Valley Gravel / Trunk road 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** AAA Valley Gravel → AAA Valley Gravel / Trunk road mine; 1986-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William J  Fuger → AAA Valley Gravel / Trunk road mine; 1986-06-01 to 2016-02-02; source msha-controller-operator-history
- **controller_controls_operator:** William J  Fuger → AAA Valley Gravel; 1986-06-01 to 2016-02-02; source msha-controller-operator-history
- **controller_controls_mine:** Ahtna Inc → AAA Valley Gravel / Trunk road mine; 2016-02-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ahtna Inc → AAA Valley Gravel; 2016-02-03 to current/open; source msha-controller-operator-history