# Relationship history for MSHA mine 2602523

Current hierarchy: **Loren E  Hunewill → H. E. Hunewill Construction Co Inc → JCI 1400RA Cone Crusher sn 99C02F1400RA**

- 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

- **controller_controls_mine:** Loren E  Hunewill  et al → JCI 1400RA Cone Crusher sn 99C02F1400RA; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H. E. Hunewill Construction Co Inc → JCI 1400RA Cone Crusher sn 99C02F1400RA; 2003-07-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren E  Hunewill  et al → H. E. Hunewill Construction Co Inc; 2003-07-02 to current/open; source msha-controller-operator-history