New Saint Croix River Crossing
Proposed MN-36/WI-64 Saint Croix River Crossing
Stillwater, MN

New Saint Croix River Crossing

• Structure ID: TBD.
• Location: River Mile 22.0.
• River Elevation: 675 Feet.
• Highway: Future MN-36, WI-64.
• Traffic Count: TBD.
• Bridge Type: Concrete Extradosed.
• Length: 3,010 Feet (Estimated).
• Width: 4 Lanes.
• Navigation Channel Width: 500 Feet (Estimated).
• Height Above Water: 140 Feet (Estimated).
• Date Built: Projected 2012 To 2014.
A new bridge to span the Saint Croix River has been talked about for decades. The existing bridge, the Stillwater Lift Bridge, is old and narrow. It is located right downtown Stillwater, which means that through and rush hour traffic has to compete with local and tourist traffic. The result is a huge traffic mess in an area that deserves to be much more calm and relaxed.

Local stakeholders have opposed the new bridge for years. They cite the fact that Stillwater is the birthplace of Minnesota, the area is historic in nature, and the river is designated a wild and scenic river. They advocate that a new bridge would spoil the scenery. They also refused to give up the life bridge, stating that it is also a historic attraction.

At the same time, population pressures are pushing twin cities area residents into western Wisconsin in ever growing numbers. People who live on the Wisconsin side say that they deserve a reasonable highway connection to the Twin Cities. Indeed, a new bridge would likely open the flood gates for migration in to western Wisconsin. Land owners would love to see that happen.

The bridge process fell apart in the late 1990's as a vast majority of the stakeholders simply would not accept a new bridge of any kind. The process was restarted in the early 2000's as part of a new federal program to speed up the environmental impact study process. Of seven projects in that program, the other six have since been built. A new sleek and thin bridge design has been approved by all concerned parties, the environmental impact study is approved, and initial funding is in place. This is enough to start some of the preparation work, and get ready to start foundations. Some of the prep work that has been lumped into this project is to remove an equal number of local eye sore structures and reclaim spoiled land to make up for the visual impact of the new bridge.

The bridge itself will be only the second extradosed bridge to be built in the United States. An extradosed bridge is similar to a cable stayed bridge, but with a major difference. In a cable stayed bridge, the cables hold up the deck segments. That requires tall towers and a steep angle for the cables. An extradosed bridge uses the shorter towers to support the deck segments near the tower. The relatively shallow angle of the cables means that they mostly pull the deck segments together rather than holding them up. The result is that the segments are held tightly together, so they essentially perform and single beams. The extradosed style is more expensive than a beam bridge, yet cheaper than a cable stayed bridge. It requires fewer pylons than a beam bridge, but more than a cable stayed bridge.

The bridge will connect MN-36 to WI-64. It will be located directly east of the expressway section of MN-36 that skirts the south side of Stillwater. The river makes a 45-degree jog to the east, so the bridge will cross directly north-east, directly perpendicular to the flow of water. Once the bridge lands in Wisconsin, a segment of freeway will head north to connect to a recently built freeway bypass of Somerset.

Image renderings are extracted from the official project website.


New Saint Croix River Crossing
New Saint Croix River Crossing
New Saint Croix River Crossing

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Photo and text by John A. Weeks III, Copyright © 2005, all rights reserved.
For further information, contact: john@johnweeks.com