# Relationship history for MSHA mine 0405595

Current hierarchy: **Barney R  Northcote → Barney Northcote Inc → Harlow Quarry/Corona**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Barney R  Northcote → Harlow Quarry/Corona; 2001-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barney Northcote Inc → Harlow Quarry/Corona; 2004-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barney R  Northcote → Barney Northcote Inc; 2004-01-20 to current/open; source msha-controller-operator-history