# Relationship history for MSHA mine 3400677

Current hierarchy: **Scott  Sober → Sober Brothers Inc → Turner Plant #3**

- 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

- **operator_operates_mine:** Sober Brothers Inc → Turner Plant #3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thomas R  Sober → Turner Plant #3; 1950-01-01 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_operator:** Thomas R  Sober → Sober Brothers Inc; 1950-01-01 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Sober → Turner Plant #3; 2024-11-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Scott  Sober → Sober Brothers Inc; 2024-11-05 to current/open; source msha-controller-operator-history