# Relationship history for MSHA mine 3700221

Current hierarchy: **Vincent C  Koczkodan → Coop Farm → Coop Farm**

- 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:** Coop Farm → Coop Farm; 2013-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vincent C  Koczkodan → Coop Farm; 2013-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vincent C  Koczkodan → Coop Farm; 2013-12-11 to current/open; source msha-controller-operator-history