# Relationship history for MSHA mine 4801664

Current hierarchy: **Kurt  Croell → Croell, Inc. → West Wash Plant #11**

- 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

- **controller_controls_mine:** Roger  Croell → West Wash Plant #11; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → West Wash Plant #11; 1995-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert C  Willits → West Wash Plant #11; 1997-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Willits Company, Inc. → West Wash Plant #11; 2004-10-25 to 2016-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Robert C  Willits → Willits Company, Inc.; 2004-10-25 to 2016-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → West Wash Plant #11; 2014-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Simon Contractors → West Wash Plant #11; 2016-06-17 to 2020-12-10; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Simon Contractors; 2016-06-17 to 2020-12-10; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → West Wash Plant #11; 2020-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2020-12-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 2020-12-11 to 2013-12-31; source msha-controller-operator-history