# Relationship history for MSHA mine 2302599

Current hierarchy: **Goldis Enterprises Inc dba IKO → Bismarck Granules Inc. → IKO Bismarck**

- 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:** Bismarck Granules Inc. → IKO Bismarck; 2025-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Goldis Enterprises Inc dba IKO → IKO Bismarck; 2025-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goldis Enterprises Inc dba IKO → Bismarck Granules Inc.; 2025-07-30 to current/open; source msha-controller-operator-history