Careful planning reduces project timeline from a two-years to a one-year
In order to reduce the impact to the public, MnDOT split the I-35 project into three phases and included an early-completion incentive to the contractor. The contractor MnDOT selected to construct the project can do it in less time than the other bidders. The project also includes completely replacing two bridges which normally would require two years. In order to make this a one year traffic disturbance rather than a two year, MnDOT designed the bridge using a foundation system that is faster to construct than a typical bridge. The project also started about one month prior to when this type of project typically starts and will continue longer into the fall than normal. MnDOT also limited the ramp closures to 12 calendar days each – which is about half the time it typically takes to resurface a ramp set. In addition to those measures MnDOT allowed a use of a concrete mix design that is able to gain strength faster. That is a few, but not all, of the things MnDOT did to make this a one year project rather than a two year project to lessen motorist impact.