# Relationship history for MSHA mine 4202408

Current hierarchy: **Garry L  Bolinder → Bolinder Company Inc → Portable #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Garry L  Bolinder → Portable #2; 2005-02-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Bolinder Company Inc → Portable #2; 2005-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garry L  Bolinder → Bolinder Company Inc; 2005-05-20 to current/open; source msha-controller-operator-history