# Relationship history for MSHA mine 4406287

Current hierarchy: **Blankenship Joda → Jodaco Inc → Empire One**

- 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

- **controller_controls_mine:** Blankenship Joda → Empire One; 1985-12-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jodaco Inc → Empire One; 1986-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Joda → Jodaco Inc; 1986-04-01 to current/open; source msha-controller-operator-history