Greenwood Street Underpass and Roundabout

Thief River Falls, MN


The final pieces of the City’s expansive Greenwood Street Corridor Project, the railroad bridge and underpass are the first grade-separated railroad crossing in the City. Residents have been stopping for trains as long as they can remember, adding stress and delays to daily commutes. The underpass allows traffic to flow along Greenwood Street throughout the day and provides emergency response vehicles an unimpeded path across the City. Similar aesthetic treatments were used to coordinate the railroad bridge with the Greenwood Street Bridge, which crosses the Red Lake River to the west, giving both the appearance of historic, dry-stacked stone-arch bridges.



The roundabout at the intersection of Greenwood Street and Pennington Avenue was part of the City’s Greenwood Street Corridor project. The roundabout—the first in northwestern Minnesota—was largely driven by the City’s desire to avoid the significant expense of moving electrical transformers and transmission lines. An easement allowed the structures to remain in place with the street improvements working around them. A large, steel structure that connects multiple overhead lines occupied the southwest corner of Greenwood Street and Pennington Avenue. Leaving it in place and designing the roundabout to circumnavigate it was an ideal solution.



  • City Engineers Association of Minnesota 2014 Project of the Year
  • American Council of Engineering Companies of Minnesota Grand Award
  • 2014 MnDOT — AGC Bridge Construction Award

Connecting A City — Greenwood St. Corridor

Multi-phased corridor project provides major connection for south side of Thief River Falls. (5:28)