# Relationship history for MSHA mine 4202771

Current hierarchy: **Leonard Marshall Special Trust → Green Soils Company LLC. → GSC Portable #1**

- 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:** Green Soils Company LLC. → GSC Portable #1; 2024-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Leonard Marshall Special Trust → GSC Portable #1; 2024-10-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leonard Marshall Special Trust → Green Soils Company LLC.; 2024-10-14 to current/open; source msha-controller-operator-history