I-90 bridge construction project

I90_intersection_cmyk I90_main_span

Traffic will be controlled throughout the I-90 bridge construction project by multiple lane shifts and ramp closures.

Access to the Traveler Information Center, DNR boat launch, Fish and Wildlife Service boat launch and lock and dam will be affected during different stages of the project.

Interstate 90 (I90) will be kept open to traffic at all times during the project, but there will be over-dimensional permit restrictions implemented.

Trunk Highway 61 will be kept open to traffic at all times during the project, but there will be over-dimensional permit restrictions implemented.

The existing Dresbach travel information center will be closed to trucks for the duration of the project starting in the spring of 2013 and ending in the fall of 2016

The new crossing will consist of two separate bridges parallel and upstream from the existing bridge. They will be concrete box girder structures over the main river channel and precast concrete girders over the back channel.

Details of the new river bridges:

100 year design life

Length: 2,593-feet

Width: approximately 45 to 66 feet

Two 12-foot lanes each direction

Eastbound acceleration lane

12-foot outside shoulders

Six-foot inside shoulders

Cost: $175 to $225 million

 

The interchange

The final interchange configuration will provide full movement with no signals between I-90 and Highway 61 as well as access to the Traveler Information Center and boat launches from all directions. The heavily used westbound I-90 to southbound Highway 61 will feature a fly-under ramp allowing continuous movement with no competing traffic.

 

Pedestrians and Bicyclists

The final configuration will provide safe access for users on a 10-foot trail through the interchange without a single crossing with highway traffic. A modified trail system and pedestrian bridge connects riders using the High

 

way 61 shoulders south of the project to the dedicated bicycle and pedestrian path on the north end of the project. In addition, access is improved to the Rest Area/Traveler Information Center for users of the trail.

 

Visual Quality

To safely accommodate all of the desired movements, the interchange will look drastically different when completed. However, great effort was made to ensure that the resulting bridge and interchange will fit into the beautiful surroundings created by the bluff and river environment.

A “visual quality team” met during the design phase of the project to guide decisions toward a natural fit into the project setting. Stone patterns and colors were selected for the structural elements matching the surrounding limestone rocks in the bluffs. The visual quality design intends to draw attention to the landscape by minimizing the visual impact of the interchange features.

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