# Relationship history for MSHA mine 4703600

Current hierarchy: **Gregory W  Rayment → Gregs Excavating Inc. → Greg's Excavating Inc**

- 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:** Gregs Excavating Inc. → Greg's Excavating Inc; 2011-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gregory W  Rayment → Greg's Excavating Inc; 2011-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gregory W  Rayment → Gregs Excavating Inc.; 2011-02-09 to current/open; source msha-controller-operator-history