# Relationship history for MSHA mine 3700237

Current hierarchy: **Joseph R Vinagro → J.R. Vinagro Corporation → Portable 7**

- 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

- **controller_controls_mine:** Joseph R Vinagro → Portable 7; 1999-04-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J.R. Vinagro Corporation → Portable 7; 2020-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph R Vinagro → J.R. Vinagro Corporation; 2020-04-15 to current/open; source msha-controller-operator-history