# Relationship history for MSHA mine 2601480

Current hierarchy: **Loren E  Hunewill → H E Hunewill Construction Company Inc → Cedar Rapids Crusher s/n 12374**

- 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:** H E Hunewill Construction Company Inc → Cedar Rapids Crusher s/n 12374; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Loren E  Hunewill  et al → Cedar Rapids Crusher s/n 12374; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Loren E  Hunewill  et al → H E Hunewill Construction Company Inc; 1978-03-09 to current/open; source msha-controller-operator-history