# Relationship history for MSHA mine 4608506

Current hierarchy: **Brown Jimmy Lee → Okemo Corp → Plant No 1**

- 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:** Okemo Corp → Plant No 1; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brown Jimmy Lee → Plant No 1; 1995-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brown Jimmy Lee → Okemo Corp; 1995-06-01 to current/open; source msha-controller-operator-history