# Relationship history for MSHA mine 3901561

Current hierarchy: **Jerry E  Ogan → Ogan Construction & Trucking → Ogan Screener #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:** Ogan Construction & Trucking → Ogan Screener #1; 2010-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry E  Ogan → Ogan Screener #1; 2010-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry E  Ogan → Ogan Construction & Trucking; 2010-07-28 to current/open; source msha-controller-operator-history