# Relationship history for MSHA mine 3201048

Current hierarchy: **Tracy A Hazelton → H and S Contracting Inc. → Hankinson Resource**

- 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:** H and S Contracting Inc. → Hankinson Resource; 2014-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tracy A Hazelton → Hankinson Resource; 2014-12-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tracy A Hazelton → H and S Contracting Inc.; 2014-12-30 to current/open; source msha-controller-operator-history