# Relationship history for MSHA mine 0203355

Current hierarchy: **Craig  Hills; Trisha  Hills → Desert Rock Products llc → New River 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:** Desert Rock Products llc → New River Pit; 2015-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Craig  Hills et al → New River Pit; 2015-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Craig  Hills et al → Desert Rock Products llc; 2015-07-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Trisha  Hills et al → Desert Rock Products llc; 2015-07-08 to current/open; source msha-controller-operator-history