# Relationship history for MSHA mine 3003707

Current hierarchy: **Town of Berkshire → Town of Berkshire Highway → Kolberg Ser# 2504-130-5076**

- 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:** Town of Berkshire Highway → Kolberg Ser# 2504-130-5076; 2009-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Town of Berkshire → Kolberg Ser# 2504-130-5076; 2009-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Town of Berkshire → Town of Berkshire Highway; 2009-08-25 to current/open; source msha-controller-operator-history