# Relationship history for MSHA mine 0405486

Current hierarchy: **Barney R  Northcote → Barney Northcote Inc → Lytle Creek/S-5 Extec**

- 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:** Barney Northcote Inc → Lytle Creek/S-5 Extec; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barney R  Northcote → Lytle Creek/S-5 Extec; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barney R  Northcote → Barney Northcote Inc; 2001-06-01 to current/open; source msha-controller-operator-history