# Relationship history for MSHA mine 2104022

Current hierarchy: **Robert  Lorentz → W Lorentz & Sons Construction Inc. → WLC-3**

- 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

- **controller_controls_mine:** Robert  Lorentz → WLC-3; 2021-02-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W Lorentz & Sons Construction Inc. → WLC-3; 2022-03-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Lorentz → W Lorentz & Sons Construction Inc.; 2022-03-18 to current/open; source msha-controller-operator-history