# Relationship history for MSHA mine 5001810

Current hierarchy: **James  Psenak → Jim Psenak Construction, LLC → Portable**

- 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:** Jim Psenak Construction → Portable; 2004-08-04 to 2020-04-23; source msha-controller-operator-history
- **controller_controls_mine:** James  Psenak → Portable; 2004-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Psenak → Jim Psenak Construction; 2004-08-04 to 2020-04-23; source msha-controller-operator-history
- **operator_operates_mine:** Jim Psenak Construction, LLC → Portable; 2020-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James  Psenak → Portable; 2020-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James  Psenak → Jim Psenak Construction, LLC; 2020-04-24 to current/open; source msha-controller-operator-history