# Relationship history for MSHA mine 2103195

Current hierarchy: **Jerry  Rypkema → County Line Aggregate Inc → WASH PLANT  - LAKEVILLE**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** County Line Aggregate Inc → WASH PLANT  - LAKEVILLE; 1999-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry  Rypkema → WASH PLANT  - LAKEVILLE; 2002-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry  Rypkema → County Line Aggregate Inc; 2002-06-13 to current/open; source msha-controller-operator-history