# Relationship history for MSHA mine 1001664

Current hierarchy: **James  Hutchinson → Ellensburg Cement Products Inc → Portable Crusher Unit #1**

- 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:** James O  Hutchinson  et al → Portable Crusher Unit #1; 1950-01-01 to 2023-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Ellensburg Cement Products Inc → Portable Crusher Unit #1; 1985-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James O  Hutchinson  et al → Ellensburg Cement Products Inc; 1985-02-01 to 2023-07-30; source msha-controller-operator-history
- **controller_controls_mine:** James  Hutchinson → Portable Crusher Unit #1; 2023-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Hutchinson → Ellensburg Cement Products Inc; 2023-07-31 to current/open; source msha-controller-operator-history