# Relationship history for MSHA mine 3003040

Current hierarchy: **Den Besten Ramona L → Den Besten Enterprises Inc → Den Besten**

- 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:** Den Besten Enterprises Inc → Den Besten; 1992-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Den Besten Ramona L → Den Besten; 1992-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Den Besten Ramona L → Den Besten Enterprises Inc; 1992-05-01 to current/open; source msha-controller-operator-history