# Relationship history for MSHA mine 0405014

Current hierarchy: **Losta George A & Marvin Bieber → G & M Trucking → Hidden Hills Plant**

- 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:** G & M Trucking → Hidden Hills Plant; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Losta George A & Marvin Bieber → Hidden Hills Plant; 1989-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Losta George A & Marvin Bieber → G & M Trucking; 1989-03-01 to current/open; source msha-controller-operator-history