# Relationship history for MSHA mine 2401887

Current hierarchy: **O'Connor R J → Idaho Energy Resources Company → Last Chance (Prospect)**

- 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:** Idaho Energy Resources Company → Last Chance (Prospect); 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** O'Connor R J → Last Chance (Prospect); 1989-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O'Connor R J → Idaho Energy Resources Company; 1989-06-01 to current/open; source msha-controller-operator-history