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St. Croix River Crossing Project Public Information Meeting St. Croix River Crossing, Preliminary Engineering and Design Criteria Mn/DOT Contract No. 92530.

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Presentation on theme: "St. Croix River Crossing Project Public Information Meeting St. Croix River Crossing, Preliminary Engineering and Design Criteria Mn/DOT Contract No. 92530."— Presentation transcript:

1 St. Croix River Crossing Project Public Information Meeting St. Croix River Crossing, Preliminary Engineering and Design Criteria Mn/DOT Contract No

2 Project Elements Extradosed spans MN approach spans and ramps

3 General Study Description Evaluating the design and making refinements to enhance safety, and life cycle operations and maintenance of the structure.Evaluating the design and making refinements to enhance safety, and life cycle operations and maintenance of the structure. –Verify the structural sufficiency and feasibility of the conceptual bridge design as summarized in the Visual Quality Manual. –Evaluating a number of options related to the sizes of structural members with the goal of reducing cost while maintaining the overall appearance as outlined in the Visual Quality Manual. –Evaluating the constructability of the concept design and recommending appropriate refinements. Coordination of these efforts with appropriate agencies, stakeholders and the general publicCoordination of these efforts with appropriate agencies, stakeholders and the general public Prepare technical documents that will be used by the Minnesota Department of Transportation to prepare a solicitation for the final design and construction of the bridge.Prepare technical documents that will be used by the Minnesota Department of Transportation to prepare a solicitation for the final design and construction of the bridge.

4 Progress Images View of refined 3-column form Road deck view View along exterior barrier View along north side at tower

5 Elements Under Study Two vs. three column configuration –The goal is to delete the center column if structurally possible. Two vs. three column configuration –The goal is to delete the center column if structurally possible. One vs. two box girder configuration and depth of structure –The two box option requires struts be placed between them. –The option will be selected based upon cost and constructability issues. –The depth of the box girders is also being studied with the goal to reduce depth and overall cost One vs. two box girder configuration and depth of structure –The two box option requires struts be placed between them. –The option will be selected based upon cost and constructability issues. –The depth of the box girders is also being studied with the goal to reduce depth and overall cost Two column configuration Three column configuration One box girder Two box girders

6 Elements Under Study Cable attachment (exposed vs. covered) Cable attachment (exposed vs. covered) Exposed cable attachment Covered cable attachment

7 Pedestrian railing and path lighting design Bridge aesthetic lighting design Color selections Pedestrian railing and path lighting design Bridge aesthetic lighting design Color selections Additional Study and Design Efforts

8 Loop Trail Inboard of Towers View looking along trail Potential overlook plaza at tower

9 Loop Trail Outboard of Towers View looking along trail Trail widening at tower


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