# Relationship history for MSHA mine 4003016

Current hierarchy: **Brian J Beretta → Newport Sand & Gravel → Pit #1 & Plant**

- 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:** Newport Sand & Gravel → Pit #1 & Plant; 1988-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brian J Beretta et al → Pit #1 & Plant; 1988-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brian J Beretta et al → Newport Sand & Gravel; 1988-12-01 to current/open; source msha-controller-operator-history