# Relationship history for MSHA mine 2501041

Current hierarchy: **Kurt  Croell → Croell, Inc. → Wash Plant #8 (Dredge #2)**

- 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:** Florom Harvey & Gary Gayman → Wash Plant #8 (Dredge #2); 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Croell → Wash Plant #8 (Dredge #2); 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Gayman Sand & Gravel → Wash Plant #8 (Dredge #2); 1985-07-01 to 1994-04-21; source msha-controller-operator-history
- **controller_controls_operator:** Florom Harvey & Gary Gayman → Gayman Sand & Gravel; 1985-07-01 to 1994-04-21; source msha-controller-operator-history
- **controller_controls_mine:** Bill  Lemons et al → Wash Plant #8 (Dredge #2); 1990-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Materials Inc. → Wash Plant #8 (Dredge #2); 1994-04-22 to 2020-02-06; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Lemons et al → Western Materials Inc.; 1994-04-22 to 2020-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → Wash Plant #8 (Dredge #2); 2014-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → Wash Plant #8 (Dredge #2); 2020-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2020-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 2020-02-07 to 2013-12-31; source msha-controller-operator-history