# Relationship history for MSHA mine 0203501

Current hierarchy: **Rodney W  George; Timothy  Rosengren → Rango Inc. → Portable Crusher No. 4**

- 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:** Timothy  Rosengren et al → Portable Crusher No. 4; 2017-10-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rango Inc. → Portable Crusher No. 4; 2024-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy  Rosengren et al → Rango Inc.; 2024-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney W  George et al → Rango Inc.; 2024-03-18 to current/open; source msha-controller-operator-history