# Relationship history for MSHA mine 4300509

Current hierarchy: **Brent  Lindstrom → Car-O-Lin → CAR-O-LIN**

- 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:** Car-O-Lin → CAR-O-LIN; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Lindstrom → CAR-O-LIN; 1997-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Lindstrom → Car-O-Lin; 1997-06-01 to current/open; source msha-controller-operator-history