# Relationship history for MSHA mine 2103844

Current hierarchy: **Bradley C  Lund → Bradley C. Lund → Cedarapids Crusher**

- 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:** Bradley C. Lund → Cedarapids Crusher; 2014-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bradley C  Lund → Cedarapids Crusher; 2014-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley C  Lund → Bradley C. Lund; 2014-10-28 to current/open; source msha-controller-operator-history