# Relationship history for MSHA mine 3200900

Current hierarchy: **Donald E  Rustad → Rustad's LLC → Mobile 2**

- 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

- **controller_controls_mine:** Donald E  Rustad et al → Mobile 2; 1987-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rustad's LLC → Mobile 2; 2011-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Donald E  Rustad et al → Rustad's LLC; 2011-07-26 to current/open; source msha-controller-operator-history