# Relationship history for MSHA mine 1002024

Current hierarchy: **Kevin L  Rowley → CAN-ADA Crushing & Gravel → 54 Inch Portable Plant**

- 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:** Kevin L  Rowley → 54 Inch Portable Plant; 1997-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** CAN-ADA Crushing & Gravel → 54 Inch Portable Plant; 2002-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin L  Rowley → CAN-ADA Crushing & Gravel; 2002-03-29 to current/open; source msha-controller-operator-history