# Relationship history for MSHA mine 2302487

Current hierarchy: **Thomas  Radmacher; Robert  Radmacher → AA Quarry LLC → AA Quarry LLC**

- 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:** AA Quarry LLC → AA Quarry LLC; 2014-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Radmacher et al → AA Quarry LLC; 2014-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Radmacher et al → AA Quarry LLC; 2014-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert  Radmacher et al → AA Quarry LLC; 2014-11-21 to current/open; source msha-controller-operator-history