# Relationship history for MSHA mine 4703361

Current hierarchy: **Kevin W  Hahn → Hahn Excavating & Limestone Products → Hahn-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:** Hahn Excavating & Limestone Products → Hahn-1; 2003-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kevin W  Hahn → Hahn-1; 2003-07-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kevin W  Hahn → Hahn Excavating & Limestone Products; 2003-07-16 to current/open; source msha-controller-operator-history