# Relationship history for MSHA mine 2602361

Current hierarchy: **Andrew J  Borasky → A Borasky Excavating → A. BORASKY EXCAVATING**

- 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:** A Borasky Excavating → A. BORASKY EXCAVATING; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Andrew J  Borasky → A. BORASKY EXCAVATING; 1998-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Andrew J  Borasky → A Borasky Excavating; 1998-08-01 to current/open; source msha-controller-operator-history