# Relationship history for MSHA mine 5001659

Current hierarchy: **Alan  See; Tim  Schwanke → Alaska Rock-Div/Summit Alaska Inc → Knik Goose Bay Road Pit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Alaska Rock-Div/Summit Alaska Inc → Knik Goose Bay Road Pit; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan  See  et al → Knik Goose Bay Road Pit; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alan  See  et al → Alaska Rock-Div/Summit Alaska Inc; 2000-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tim  Schwanke  et al → Alaska Rock-Div/Summit Alaska Inc; 2000-04-01 to current/open; source msha-controller-operator-history