# Relationship history for MSHA mine 4202560

Current hierarchy: **Rick  Havenstrite → Desert Hawk Gold Corp → Kiewit 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:** Desert Hawk Gold Corp → Kiewit Mine; 2010-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rick  Havenstrite → Kiewit Mine; 2010-10-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rick  Havenstrite → Desert Hawk Gold Corp; 2010-10-18 to current/open; source msha-controller-operator-history