# Relationship history for MSHA mine 4503331

Current hierarchy: **Jesse  Kollman → Arris Kollman Trucking Inc → Portable Crusher**

- 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:** Kollman Trucking Inc → Portable Crusher; 1994-11-01 to 1997-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Jesse  Kollman → Portable Crusher; 1994-11-01 to 1997-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Jesse  Kollman → Kollman Trucking Inc; 1994-11-01 to 1997-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Arris Kollman Trucking Inc → Portable Crusher; 1997-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jesse  Kollman → Portable Crusher; 1997-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jesse  Kollman → Arris Kollman Trucking Inc; 1997-02-20 to current/open; source msha-controller-operator-history