# Relationship history for MSHA mine 0202911

Current hierarchy: **Chris  Blythe → Chris Blythe Backhoe Service → CHRIS BLYTHE AGGREGATE**

- 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

- **operator_operates_mine:** Chris Blythe Backhoe Service → CHRIS BLYTHE AGGREGATE; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chris  Blythe → CHRIS BLYTHE AGGREGATE; 2000-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chris  Blythe → Chris Blythe Backhoe Service; 2000-11-01 to current/open; source msha-controller-operator-history