# Relationship history for MSHA mine 4701219

Current hierarchy: **Zeman Victor → Zeman Construction & Concrete Company Inc → Cooperstown 1**

- 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:** Zeman Construction & Concrete Company Inc → Cooperstown 1; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Zeman Victor → Cooperstown 1; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Zeman Victor → Zeman Construction & Concrete Company Inc; 1979-01-01 to current/open; source msha-controller-operator-history