# Relationship history for MSHA mine 3610177

Current hierarchy: **Kenneth M  Pollock → Newport Aggregate, Inc. → West End Bank Operation**

- 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:** Kenneth M  Pollock et al → West End Bank Operation; 2014-11-13 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Newport Aggregate, Inc. → West End Bank Operation; 2016-11-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth M  Pollock et al → Newport Aggregate, Inc.; 2016-11-22 to current/open; source msha-controller-operator-history