Replaced Marsh Arch
New Mackey Bridge
Deck Cross-section
Bridge Deck Plan View
Standard Deck Panel
Completed in December 2006, the new Mackey Bridge replaced a Marsh Rainbow Arch Bridge located on 120th Street, over Squaw Creek, in Boone County, Iowa.
The Marsh Arch was built in 1917 and featured a single 76-foot long span with an 18 foot wide roadway.
The new Bridge has three spans, two 47’-5 end spans, and a 56’-6 center span, with a 30 degree right ahead skew.
It was built with integral abutments, two fixed piers, a precast deck situated on four precast girders, and measures 151’-4 feet long with a 30’-6 foot wide roadway.
Replaced Marsh Arch
New Mackey Bridge
Deck Cross-section
Bridge Deck Plan View
Standard Deck Panel