Crews on Friday used explosives to destroy parts of the Fairfax Bridge, which connects Platte and Wyandotte counties.
When the first of two blasts went off shortly after 9 a.m. Friday, a cloud of dust could be seen and then the end span on the south of the bridge crashed to the ground.
A second blast an hour later dropped the end span on the bridge’s north side.
Northbound and southbound lanes of U.S. 69 were closed much of the day.
Explosives will be used later this month to remove the part of the bridge that spans the Missouri River.
The bridge, built in 1933, had carried southbound U.S. 69 traffic. Traffic has already been switched to the adjacent Platte Purchase Bridge, which was built in 1957.
The demolition work is part of a joint project involving the Missouri and Kansas transportation departments to replace both bridges with one bridge, to be completed in December 2016.