# Relationship history for MSHA mine 1700741

Current hierarchy: **Rhonda D  Jordan → R.F. JORDAN & SONS INC. → ELLSWORTH PORTABLE PLANT**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** R.F. JORDAN & SONS INC. → ELLSWORTH PORTABLE PLANT; 2003-04-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Patrick  Jordan → ELLSWORTH PORTABLE PLANT; 2003-04-10 to 2020-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Patrick  Jordan → R.F. JORDAN & SONS INC.; 2003-04-10 to 2020-05-03; source msha-controller-operator-history
- **controller_controls_mine:** Rhonda D  Jordan → ELLSWORTH PORTABLE PLANT; 2020-05-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rhonda D  Jordan → R.F. JORDAN & SONS INC.; 2020-05-04 to current/open; source msha-controller-operator-history