# Relationship history for MSHA mine 2302359

Current hierarchy: **Leroy  Tarr; Wanda  Tarr → T & M Stone Quarry LLC → Buffalo Quarry**

- 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:** Leroy  Tarr et al → Buffalo Quarry; 1996-04-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** T & M Stone Quarry LLC → Buffalo Quarry; 2007-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leroy  Tarr et al → T & M Stone Quarry LLC; 2007-04-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wanda  Tarr et al → T & M Stone Quarry LLC; 2007-04-17 to current/open; source msha-controller-operator-history