# Relationship history for MSHA mine 3002450

Current hierarchy: **Brian  O'Connor → O'Connor Realty Inc. → O'CONNOR QUARRY**

- 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:** Edward & Thomas O'Connor Inc → O'CONNOR QUARRY; 1980-04-01 to 2026-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Brian  O'Connor et al → O'CONNOR QUARRY; 1980-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  O'Connor et al → Edward & Thomas O'Connor Inc; 1980-04-01 to 2026-01-19; source msha-controller-operator-history
- **operator_operates_mine:** O'Connor Realty Inc. → O'CONNOR QUARRY; 2026-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian  O'Connor et al → O'CONNOR QUARRY; 2026-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian  O'Connor et al → O'Connor Realty Inc.; 2026-01-20 to current/open; source msha-controller-operator-history