# Relationship history for MSHA mine 4703494

Current hierarchy: **Roger P  Delsart → DELSART EXCAVATING, LLC. → POWER SCREENER**

- 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:** Delsart Excavating LLC → POWER SCREENER; 2006-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger P  Delsart → POWER SCREENER; 2006-11-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger P  Delsart → Delsart Excavating LLC; 2006-11-29 to current/open; source msha-controller-operator-history