# Relationship history for MSHA mine 4103265

Current hierarchy: **Barber Donald → Barber'S Dirt Pit → Barber'S Dirt Pit**

- 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:** Yarbrough Dirt Pit Inc → Barber'S Dirt Pit; 1984-10-01 to 1986-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Yarbrough Newal → Barber'S Dirt Pit; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Yarbrough Newal → Yarbrough Dirt Pit Inc; 1984-10-01 to 1986-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Barber'S Dirt Pit → Barber'S Dirt Pit; 1986-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barber Donald → Barber'S Dirt Pit; 1986-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barber Donald → Barber'S Dirt Pit; 1986-05-06 to current/open; source msha-controller-operator-history