# Relationship history for MSHA mine 1700744

Current hierarchy: **Rodney S  Boyington → Southern Maine Sitework Inc → Standish Operation**

- 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:** Southern Maine Sitework Inc → Standish Operation; 2003-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Rodney S  Boyington → Standish Operation; 2003-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rodney S  Boyington → Southern Maine Sitework Inc; 2003-05-06 to current/open; source msha-controller-operator-history