# Relationship history for MSHA mine 1401830

Current hierarchy: **Lauren  Kaaz; Matt  Kaaz; Greg  Kaaz → Leavenworth Excavating & Equipment Co., Inc. → KPI/JCI773**

- 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:** Leavenworth Excavating & Equipment Co., Inc. → KPI/JCI773; 2022-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lauren  Kaaz et al → KPI/JCI773; 2022-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lauren  Kaaz et al → Leavenworth Excavating & Equipment Co., Inc.; 2022-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Kaaz et al → Leavenworth Excavating & Equipment Co., Inc.; 2022-09-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Kaaz et al → Leavenworth Excavating & Equipment Co., Inc.; 2022-09-19 to current/open; source msha-controller-operator-history