# Relationship history for MSHA mine 4502586

Current hierarchy: **Iddings James R → Iddings Inc → Iddings Portable Wash 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:** Washington Asphalt Company Inc → Iddings Portable Wash Plant; 1978-03-09 to 1983-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Lakeside Industries Inc. et al → Iddings Portable Wash Plant; 1978-03-09 to 1983-02-07; source msha-controller-operator-history
- **controller_controls_operator:** Lakeside Industries Inc. et al → Washington Asphalt Company Inc; 1978-03-09 to 1983-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Iddings Inc → Iddings Portable Wash Plant; 1983-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Iddings James R → Iddings Portable Wash Plant; 1983-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iddings James R → Iddings Inc; 1983-02-08 to current/open; source msha-controller-operator-history