# Relationship history for MSHA mine 4801357

Current hierarchy: **Kurt  Croell → Croell, Inc. → West Wash Plant #10**

- 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:** Read Readymix Company → West Wash Plant #10; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James E. Simon Co., A Wyoming Corp → West Wash Plant #10; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Croell → West Wash Plant #10; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Read Readymix Company → West Wash Plant #10; 1981-08-01 to 1982-10-18; source msha-controller-operator-history
- **controller_controls_operator:** Read Readymix Company → Read Readymix Company; 1981-08-01 to 1982-10-18; source msha-controller-operator-history
- **operator_operates_mine:** James E Simon Company → West Wash Plant #10; 1982-10-19 to 1995-01-25; source msha-controller-operator-history
- **controller_controls_operator:** James E. Simon Co., A Wyoming Corp → James E Simon Company; 1982-10-19 to 1995-01-25; source msha-controller-operator-history
- **operator_operates_mine:** Simon Contractors → West Wash Plant #10; 1995-01-26 to 2020-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → West Wash Plant #10; 1995-01-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → Simon Contractors; 1995-01-26 to 2020-12-10; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → West Wash Plant #10; 2014-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → West Wash Plant #10; 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