# Relationship history for MSHA mine 3608313

Current hierarchy: **Dale L  Malinzak → M & Y Services Inc → Gibson Yard**

- 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:** M & Y Services Inc → Gibson Yard; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dale L  Malinzak → Gibson Yard; 1992-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dale L  Malinzak → M & Y Services Inc; 1992-01-01 to current/open; source msha-controller-operator-history