Replacement of the BNSF Approach Spans over the Mississippi River

摘要

The BNSF Railroad crosses the Mississippi River at Burlington, Iowa. The original 120-yearold bridge consisted of six 250-foot approach spans, one 360-foot swing span and two 80-foot girderspans. This paper will focus on the complex planning, equipment and construction activities required toreplace the approach structures in five 36-hour closures.