Final Winona Bridge work contract awarded
Construction Manager, General Contractor method credited with $17.45 million in positive cost impact
WINONA, Minn. – The final work package construction contract for the Winona Bridge construction and rehabilitation project was awarded on June 22 to Ames Construction, Inc. from Burnsville, Minn. This $27.8 million contract includes reconstruction of the approach spans of Bridge No. 5900, along with all remaining roadway and site work.
Last year, MnDOT paused the process when engineering estimates showed a projected overall $30 million cost growth over previous project estimates. MnDOT worked with its partners and the community to develop a solution that could achieve the required safety and historical needs for the existing bridge (Bridge 5900), which was built in 1942. One element of the solution was modernizing the spans on Bridge 5900 in Winona, effectively matching the span lengths of new Bridge 85851, while saving approximately $2 million.
This cost savings, along with MnDOT’s use of the Construction Manager/General Contractor procurement method allowed it to find $17.4 million in cost savings documented by MnDOT. The complex project that included construction and rehabilitation of a 75-year-old Mississippi River bridge is being delivered over the initial budget, but within these important cost savings, the total cost overrun could have been even higher. These cost savings also include contractor means and methods cost reductions as a part of the Construction Manager/General Contractor procurement method, where the Ames Construction team worked with MnDOT during the design phase to identify potential cost, schedule and risk items.
“This was MnDOT’s first project where used the Construction Manager/General Contractor procurement method and we’re pleased with how it’s allowed us to work in an accelerated fashion, but also adjust and work to find savings as the project advanced,” said Terry Ward, MnDOT construction project manager. “There is risk with a project this complex, but it also provides flexibility and speed, which we feel has benefited the community and its transportation needs.”
The overall construction letting amounts for all six work packages is $145.8 million.
Construction Manager / General Contractor (CMGC) is an integrated approach to planning, designing and constructing a project. Owners, designers and contractors work collaboratively to develop the project scope, optimize the design, improve quality and manage cost. More information on CMGC can be found at MnDOT’s website: http://www.dot.state.mn.us/const/tools/const-manager-general-contractor.html
Currently, the approach spans on Bridge 5900 are being removed and replaced as part of the rehabilitation. Rehabilitation work on Bridge 5900 will continue until late 2019 or early 2020.
Work crews are sandblasting, painting and installing reinforcing plates on the river portion of the bridge, which is closed to traffic. Traffic continues in both directions on the new bridge, which was completed in 2016.
Follow construction progress on the project website at www.mndot.gov/winonabridge.
Motorists should always be attentive, drive with caution, slow down in work zones and never enter a road blocked with barriers or cones.