# Relationship history for MSHA mine 4801331

Current hierarchy: **Kurt  Croell → Croell, Inc. → WEST WASH PLANT #14**

- 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:** Roger  Croell → WEST WASH PLANT #14; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Rocky Mountain Pre-Mix Concrete → WEST WASH PLANT #14; 1980-09-01 to 2024-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Brad  Hulme et al → WEST WASH PLANT #14; 1980-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brad  Hulme et al → Rocky Mountain Pre-Mix Concrete; 1980-09-01 to 2024-07-15; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → WEST WASH PLANT #14; 2014-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → WEST WASH PLANT #14; 2024-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2024-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 2024-07-16 to 2013-12-31; source msha-controller-operator-history