# Relationship history for MSHA mine 4703097

Current hierarchy: **Joseph  Murphy → MCC, Inc. → Plant 17 - Portable Washer #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:** Joseph  Murphy → Plant 17 - Portable Washer #2; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** DeLaet Enterprises, Ltd. → Plant 17 - Portable Washer #2; 1997-05-01 to 2013-09-01; source msha-controller-operator-history
- **controller_controls_mine:** Michael W  De Laet → Plant 17 - Portable Washer #2; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael W  De Laet → DeLaet Enterprises, Ltd.; 1997-05-01 to 2013-09-01; source msha-controller-operator-history
- **operator_operates_mine:** MCC, Inc. → Plant 17 - Portable Washer #2; 2013-09-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph  Murphy → MCC, Inc.; 2013-09-02 to current/open; source msha-controller-operator-history