# Relationship history for MSHA mine 0404402

Current hierarchy: **O'Connor E E → Sidewinder Mine & Milling Company Inc → Sidewinder #1**

- 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:** Sidewinder Mine & Milling Company Inc → Sidewinder #1; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** O'Connor E E → Sidewinder #1; 1980-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** O'Connor E E → Sidewinder Mine & Milling Company Inc; 1980-03-01 to current/open; source msha-controller-operator-history