# Relationship history for MSHA mine 1700796

Current hierarchy: **Louis H  DeWildt → DeWildt Excavating LLC → Holstein Ridge Gravel**

- 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:** DeWildt Excavating LLC → Holstein Ridge Gravel; 2006-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Louis H  DeWildt → Holstein Ridge Gravel; 2006-03-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Louis H  DeWildt → DeWildt Excavating LLC; 2006-03-28 to current/open; source msha-controller-operator-history