# Relationship history for MSHA mine 4202173

Current hierarchy: **Tony  Mascaro → Tony Mascaro Inc → TONY MASCARO INC PORTABLE**

- 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:** Tony Mascaro Inc → TONY MASCARO INC PORTABLE; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tony  Mascaro → TONY MASCARO INC PORTABLE; 1997-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tony  Mascaro → Tony Mascaro Inc; 1997-05-01 to current/open; source msha-controller-operator-history