# Relationship history for MSHA mine 2402619

Current hierarchy: **Lok  Home → The Robbins Company → Stillwater Mine Company**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** The Robbins Company → Stillwater Mine Company; 2012-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lok  Home → Stillwater Mine Company; 2012-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lok  Home → The Robbins Company; 2012-04-26 to current/open; source msha-controller-operator-history