# Relationship history for MSHA mine 0103638

Current hierarchy: **Vince  Labarbera → Landsdown Corporation → Landsdown Montgomery 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Vince  Labarbera → Landsdown Montgomery Plant; 2019-05-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Landsdown Corporation → Landsdown Montgomery Plant; 2025-11-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vince  Labarbera → Landsdown Corporation; 2025-11-24 to current/open; source msha-controller-operator-history