# Relationship history for MSHA mine 4703613

Current hierarchy: **Scott M  Nordby → Nordby Enterprises → Finlay Screen**

- 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:** Nordby Enterprises → Finlay Screen; 2011-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Scott M  Nordby → Finlay Screen; 2011-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott M  Nordby → Nordby Enterprises; 2011-06-23 to current/open; source msha-controller-operator-history