Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
This page is no longer being updated and the information may be out of date.
Bridge Column Inspection3
Return to Bridge Construction Page
Concept of an Underwater Bridge Column Inspector RoboCrane showing the winch-boom (outrigger) deployment details.
Created August 24, 2011, Updated May 27, 2026