U.S. Sen. Amy Klobuchar and U.S. Rep. Michele Bachmann were among those in Stillwater at the Saturday morning event. After decades of debate, lawmakers voted Thursday to exempt the proposed St. Croix River crossing from the Wild and Scenic Rivers Act. President Obama is expected to support it. The new four-lane bridge will replace the 80-year-old Stillwater Lift Bridge.

Supporters of a new bridge near Stillwater have been pushing the concept for decades. They believe they can finally reach their goal if the House votes to exempt part of the St. Croix from its status as a Wild and Scenic River. But the bridge has its critics. They're using financial arguments in hopes of rallying opposition.

President Barack Obama signed the bill authorizing a $690 million bridge near Stillwater. He signed it over the objections of some federal officials who worry exempting the St. Croix from the Wild and Scenic Rivers Act sets a bad precedent.

MnDOT officials tell MPR that foundation work on the new bridge crossing the St. Croix River downstream from Stillwater will begin next spring, rather than in 2014. The proposed four-lane bridge connecting Minnesota and Wisconsin will replace the 80-year-old Stillwater Lift Bridge. The entire project is estimated to cost up to $676 million and take about three years to complete.

Minnesota and Wisconsin selected an architect who plans a St. Croix River bridge with a design that will minimize its impact on the environment. The first design of its type in the U.S. is under construction now, although it's widely used in Europe and Japan. The shorter towers of the "extradosed" bridge will keep it below the bluff line.

Sen. Amy Klobuchar and Rep. Michele Bachmann will be among the people in Stillwater this weekend for the event. The U.S. House and Senate sent legislation to President Obama exempting the $700 million dollar project from the the Wild and Scenic Rivers Act.

The Senate has already approved a new St. Croix River bridge near Stillwater and now the House has put the issue on its calendar for this week. Congresswoman Michele Bachmann says she's confident the bride will be approved. It will need two-thirds of the votes cast to pass.

Federal environmental approval for the the new St. Croix River bridge will have to wait until next year. Lawmakers adjourned for the holidays without taking any congressional action. Eight U.S. House members from Minnesota and Wisconsin are urging their colleagues to make the project a priority. The $690 million, four-lane bridge would replace the current 80-year-old Stillwater Lift Bridge between Minnesota and Wisconsin.