# Relationship history for MSHA mine 3401270

Current hierarchy: **Scott  Sober → Sober Brothers Inc → Tapp No 4**

- 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

- **controller_controls_mine:** Thomas R  Sober → Tapp No 4; 1950-01-01 to 2024-11-04; source msha-controller-operator-history
- **operator_operates_mine:** Sober Brothers Inc → Tapp No 4; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas R  Sober → Sober Brothers Inc; 1980-05-01 to 2024-11-04; source msha-controller-operator-history
- **controller_controls_mine:** Scott  Sober → Tapp No 4; 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