CSAH 21 Downtown Prior Lake Reconstruction, Scott County, Minnesota

CSAH 21 Downtown Prior Lake Reconstruction

Icon of Scott County, Minnesota

Scott County, Minnesota


“This is the first meeting I have been to where I felt heard; not only heard, but listened to—I had my questions answered directly.”

– Participant of the Corridor Visioning Group

The TH 13/CSAH 21 intersection and CSAH 21 corridor in downtown Prior Lake lacked capacity to move traffic safely and efficiently. It has been studied multiple times over the last two decades without identifying a solution supported by all stakeholders.

While a recommended plan was adopted by the board of commissioners in 2005, significant concerns were raised and major conflicts existed between access and mobility, roadway classification, and community needs. Meanwhile, the corridors remained a barrier in downtown.

Recognizing this history, Bolton & Menk led an innovative and comprehensive public engagement effort using various outreach formats. Our work included a visioning study, the goals of which were to engage the public, build trust between governing agencies and the public, and develop a solution that could be supported by stakeholders. The visioning study was used to level the playing field, start over, and identify important community values.

After several months of identifying and evaluating concepts and engaging the public, a single vision was recommended and adopted. The TH 13/CSAH 21 project moved through final design and was constructed in 2020.

  • Great Lakes District of the Institute of Transportation Engineers – 2021 Transportation Achievement Award – Traffic Engineering
  • Institute of Transportation Engineers – 2021 Transportation Achievement Award – Traffic Engineering
  • American Council of Engineering Companies of Minnesota – 2020 Honor Award
  • City Engineers Association of Minnesota – 2020 Project of the Year Honorable Mention


Named one of the very best workplaces in the State of Minnesota! We’re proud to rank in the Top 50 on the list, and even prouder that we were voted in by our own employees.