# Relationship history for MSHA mine 2402750

Current hierarchy: **David  Baltrusch; Chad  Baltrusch → DC Aggregate LLC → Prewitt**

- 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:** DC Aggregate LLC → Prewitt; 2020-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chad  Baltrusch et al → Prewitt; 2020-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chad  Baltrusch et al → DC Aggregate LLC; 2020-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Baltrusch et al → DC Aggregate LLC; 2020-01-09 to current/open; source msha-controller-operator-history