# Relationship history for MSHA mine 4703673

Current hierarchy: **Wesley A  Kempen → KEMPEN EXCAVATING, LLC. → WOLDT MINE**

- 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:** Kempen Excavating LLC → WOLDT MINE; 2012-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wesley A  Kempen → WOLDT MINE; 2012-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wesley A  Kempen → Kempen Excavating LLC; 2012-10-02 to current/open; source msha-controller-operator-history