# Relationship history for MSHA mine 2104040

Current hierarchy: **Mike  Knopik → Knopik Crushing Inc → Lippmann**

- 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

- **controller_controls_mine:** Mike  Knopik → Lippmann; 2008-08-19 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Knopik Crushing Inc → Lippmann; 2022-09-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike  Knopik → Knopik Crushing Inc; 2022-09-20 to current/open; source msha-controller-operator-history