# Relationship history for MSHA mine 1300749

Current hierarchy: **Kurt  Croell → CROELL, INC. → WASHCREW #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

- **operator_operates_mine:** Carpenter & Kraft Ready Mix → WASHCREW #1; 1950-01-01 to 1983-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Frank M  Kraft → WASHCREW #1; 1950-01-01 to 1988-07-26; source msha-controller-operator-history
- **controller_controls_operator:** Frank M  Kraft → Carpenter & Kraft Ready Mix; 1950-01-01 to 1983-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Croell → WASHCREW #1; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Croell, Inc. → WASHCREW #1; 1983-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell, Inc.; 1983-08-30 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → WASHCREW #1; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell, Inc.; 2014-01-01 to current/open; source msha-controller-operator-history