The new bridge carries US 81 over the Missouri River into downtown Yankton, South Dakota. The $24M project was opened in the fall of 2008 ahead of schedule. The 1500 foot long bridge is a 6 span structure with a maximum span of 280 feet. The superstructure spans were supported by haunched steel plate girders. The aesthetic open column bents were founded on drilled shafts. The outer columns were extended above the bridge deck surface with decorative precast towers. The bridge carries two lanes of SB and NB traffic separated by a painted center median. The project was constructed on a new alignment and included phased grading and paving work on both ends of the bridge. The new bridge, named the Discovery Bridge, is located 1000 feet upstream from the old double decker lift span thru truss bridge that was later converted into a pedestrian bridge. HDR performed the inspection of the existing bridge and designed and oversaw the rehabilitation under a separate contract for the South Dakota Department of Transportation. Previously, HDR had performed the corridor study, Environmental Impact Statement and the preliminary bridge design.
Completed Time: October 2008
Project's Value: $24M
Contract: $92.9 Million
1.7 Mile Bridge crosses Lake Dallas, Texas
Contract: $37.6 Million
Jensen's 14th crossing of the Missouri River
2,478' bridge with a span of 425'
State Route 13 over the Cumberland River
Bridge Width: 77 ft. 11 in.
Bridge Length: 1,686 ft 2 in.
Project Cost: $49.99M
1,400 ft bridge over Hillebrandt Bayou
Concrete Beam Bridge over Lake Texoma
A connecting bridge over the Raccoon River
Used a Value Engineering Proposal to change bridge design
Jensen's 13th time crossing the Missouri River
The bridge is 2,670 feet long and is a 15 span structure with a maximum span of 450 feet over the navigation channel.
310' tied arch bridge
Steel girder bridge replacement in Omaha, NE
Building a culvert for 2nd Ave
7-year project included 18 bridges
18 spans resulting in a total bridge length of 3,280 feet
Crossing the Mississippi River
Twin bridges spanning 1,630'
Two extraordinary, large and complex cofferdams were built
Deepest drill shafts in Louisiana at time of project
Pedestrian Bridge connecting 15 miles of recreational trails
Long bridge spans, falsework towers and multi-crane lifts
Completed: December 2009