# Relationship history for MSHA mine 1601400

Current hierarchy: **Irv  Daniel → IRV Daniel → Island**

- 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:** IRV Daniel → Island; 2002-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Irv  Daniel → Island; 2002-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Irv  Daniel → IRV Daniel; 2002-07-23 to current/open; source msha-controller-operator-history