# Relationship history for MSHA mine 3503954

Current hierarchy: **Michael  Leboki → Taylor Transport Inc. → Portable One**

- 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:** Taylor Transport → Portable One; 2024-02-12 to 2024-04-25; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Leboki → Portable One; 2024-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Leboki → Taylor Transport; 2024-02-12 to 2024-04-25; source msha-controller-operator-history
- **operator_operates_mine:** Green Works Enterprises Inc. → Portable One; 2024-04-26 to 2025-03-05; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Leboki et al → Portable One; 2024-04-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Leboki et al → Green Works Enterprises Inc.; 2024-04-26 to 2025-03-05; source msha-controller-operator-history
- **operator_operates_mine:** Taylor Transport Inc. → Portable One; 2025-03-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Leboki → Taylor Transport Inc.; 2025-03-06 to current/open; source msha-controller-operator-history