TH 169 and I-494 Interchange

Bloomington, Minnesota

After completing work on the preliminary design and Environmental Assessment for the Pioneer Trail, Anderson Lakes Parkway, and I-494 interchanges on TH 169, SRF was selected by the Minnesota Department of Transportation to provide design concept and preliminary engineering services for the reconstruction of the I-494/TH 169 interchange. Estimated at more than $110 million, this three-level interchange included extensive development and evaluation of concept alternatives to determine the effects of providing local access with regional freeway movements.

The interchange area includes three cities and required extensive coordination with local, MnDOT, and FHWA staff. Several iterations of alternatives development were included in the design refinement process. Concept development included constructability and potential phasing due to limited project funding availability.

Our initial environmental work included preparing an EA addressing key project impacts, including wetlands, floodplains, noise, drainage systems, local access changes, and park impacts. Impacts to Hyland-Bush-Anderson Lakes Park Reserve required design efforts to minimize right of way acquisition and negotiate replacement lands as mitigation under Section 6(f) (LAWCON funding). Other mitigation studies included noise wall studies and minimization of visual impacts.