Highway 61 Hastings Bridge, United States of America
Highway 61 Hastings Bridge is a new crossing project for the Mississippi River on the Highway 61 in Minnesota, US. The new tied-arch bridge will replace the age-old continuous steel high through-truss Hastings High Bridge, which was built in 1951. The bridge currently serves an average of 32,000 vehicles a day.
In June 2010, the Minnesota Department of Transportation (Mn/DoT) selected a joint venture of Lunda Construction and Ames Construction as the preferred contractor for their best-value proposal to design and build the New Hastings Bridge. Mn/DoT estimates the project cost to be about $225m, while the bid by the JV was nearly $120m; $100m less than the expected cost.
The final contract for the bridge construction was awarded on 30 June 2010. Construction of the Highway 61 Hastings Bridge will begin in October 2010 and a portion of the bridge will be open to two-lane traffic by mid 2012. All the four lanes will be opened to traffic in May 2013.
The old Hastings High Bridge is a two-lane bridge connecting Highway 61 on the north of the Mississippi River with downtown Hastings. It has a main river span of 514ft and a structural length of 1,857ft, with a total of three main and ten approach spans. The bridge was scheduled to be torn down and replaced by a new bridge upstream of the existing bridge in 2019, but the collapse of I-35W bridge in Minneapolis in August 2007 necessitated the inspection of Hastings High Bridge, which raised issues about its sustainability.
An environmental review was undertaken to study the alternatives for the new bridge. The Highway 61 Hastings Bridge Project received the 2008 transportation funding package and a travel modelling report of March 2008 showed requirement for a four-lane bridge with two traffic lanes in each direction. It also defined the construction to be carried out without long-term closure of the Hastings High Bridge. In December 2008, a bridge scoping study was conducted for feasibility of four new bridge types with an option for rehabilitation of the existing bridge. The rehabilitation alternative, however, lacked community support due to its long construction time and cost. Mn/DoT estimated the Highway 61 Hastings Bridge to cost about $225m-$265m for the design, construction and right of way and other requirements.
The Mn/Dot had proposed two alternative designs for the new Hastings Bridge based on the environmental studies, preliminary design, a visual quality process and funding authorisation from the Federal Highway Administration. The two distinct bridges were an arch bridge with a basket handle design and a cable suspension bridge. Request for proposals (RFP) for one of the two Hastings Bridge designs was called in January 2010. The RFP outlined the roadway, structural, steel and concrete requirements, with a budget of $220m.
Three joint firms were shortlisted to submit proposals for construction of the new bridge as per the two bridge alternatives – cable and arch. The design-build JV firms included PCL / Kraemer, Flatiron / Kiewit and Lunda / Ames. The Lunda / Ames JV won the bridge construction for $119.8m.
The cable bridge alternative would have been a complex cable stayed bridge supported by a 200ft tall tower. The bridge was designed to be distinctive from the earlier bridge types on the river crossing. The selected tied-arch bridge alternative is similar in size and shape to the existing bridge. The arch will be constructed off-site and ferried to the project site before being lifted onto new piers.
Highway 61 Hastings Bridge will be a four-lane span with two southbound and two northbound lanes. The arch bridge will also have a 12ft bicycle and pedestrian trial separated by a barrier. The bridge will have a river navigational channel opening and an anti-icing system on the driving surface. It is expected to have lifespan of 100 years.
A construction staging area will be built near lock and dam #2 to facilitate the bridge project. A service road will also be constructed on the north side of the proposed bridge for a safer travel on the TH 61 along with a local ring road for linking the east and west sides of Highway 61. Hastings Bridge will be constructed with a minimum closure of the roads to avoid impact to traffic on the bridge.