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St. Croix River Crossing Project Public Information Meeting

St. Croix River Crossing Project Public Information Meeting. St. Croix River Crossing, Preliminary Engineering and Design Criteria Mn/DOT Contract No. 92530. Project Elements. Extradosed spans. MN approach spans and ramps. General Study Description.

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St. Croix River Crossing Project Public Information Meeting

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

  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. • 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 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.

  4. Progress Images Road deck view View along exterior barrier View of refined 3-column form 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. • 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) Covered cable attachment Exposed cable attachment

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

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

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

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