# Relationship history for MSHA mine 2003690

Current hierarchy: **Curtis Patrick Moran Jr → Great Lakes Excavating services → Allegan Sand and 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Curtis Patrick Moran Jr → Allegan Sand and Gravel; 2023-01-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Great Lakes Excavating services → Allegan Sand and Gravel; 2025-06-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis Patrick Moran Jr → Great Lakes Excavating services; 2025-06-11 to current/open; source msha-controller-operator-history