# Relationship history for MSHA mine 4703522

Current hierarchy: **Gregory M  Reesman → Reesmans Excavating & Grading Inc. → Krueger 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Reesmans Excavating & Grading Inc. → Krueger Pit; 2008-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory M  Reesman → Krueger Pit; 2008-01-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory M  Reesman → Reesmans Excavating & Grading Inc.; 2008-01-14 to current/open; source msha-controller-operator-history