Safeguarding Structures During Nearby Construction Originally constructed in 1868, the Burlington Bridge is the ?rst iron bridge across the Mississippi. While the original engineering proved solid as BNSF used it as Chicago to Denver mainline, it’s met challenges in the modern era prompting the U.S. Coast Guard to declare it a navigational hazard. The Challenge More than 300 trains crossed the Burlington Bridge every month and tons of travel on barges below. It was therefore decided that shutting down rail or river tra?c during the construction of a new bridge would only be allowed during a single 30-hour period. With such heavy usage demands, constant river level changes and the inherent complications of working with a 115 year old bridge, monitoring was key to this project. Knowi

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