# Relationship history for MSHA mine 3200899

Current hierarchy: **Ty Lon  Kuehn → Kuehn Trenching LLC. → Plant #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:** Kuehn Trenching LLC. → Plant #1; 2011-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ty Lon  Kuehn → Plant #1; 2011-06-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ty Lon  Kuehn → Kuehn Trenching LLC.; 2011-06-27 to current/open; source msha-controller-operator-history