# Relationship history for MSHA mine 3401033

Current hierarchy: **Farley Tony → Tony Farley Trucking → Tony Farley Trucking**

- 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:** Dons Dozer & Trucking Service → Tony Farley Trucking; 1950-01-01 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Pulchny Don → Tony Farley Trucking; 1950-01-01 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Pulchny Don → Dons Dozer & Trucking Service; 1950-01-01 to 1987-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Tony Farley Trucking → Tony Farley Trucking; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Farley Tony → Tony Farley Trucking; 1987-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Farley Tony → Tony Farley Trucking; 1987-08-25 to current/open; source msha-controller-operator-history