# Relationship history for MSHA mine 0302078

Current hierarchy: **Bobby L  Kennedy → BLK Quarries, Inc → BLK Quarries, Inc-Guy**

- 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:** Bobby L  Kennedy → BLK Quarries, Inc-Guy; 2007-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** BLK Quarries, Inc → BLK Quarries, Inc-Guy; 2022-01-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bobby L  Kennedy → BLK Quarries, Inc; 2022-01-18 to current/open; source msha-controller-operator-history