Best Practices for Improving Subgrade DrainageStatus: CompleteReport Date: 06/12/2023 Summary: Poor drainage may reduce the life of a roadway by 50%, but subsurface drainage systems can be costly. Considerable research exists on the design and construction of roadway drainage systems. Counties throughout Minnesota have experience with the design, construction and maintenance of these systems. However, there was a need to synthesize the available research and firsthand experience into a practical manual. This project identified the successes and lessons learned to create a best practices guide that will improve how subsurface drainage is implemented. The focus was not solely on new construction but also on how to update and maintain existing roads, particularly frost-susceptible gravel roads. Final Deliverables: Best Practices for Improving Subgrade Drainage (Guidebook #2023RIC01) Putting Research Into Practice: Developing a Best Practices Manual for Roadway Drainage (Research Summary) Related Materials: Developing a Best Practices Manual for Roadway Drainage (Blog Post) Related Research: Project Personnel: Principal Investigator: Susan Miller Co-Principal Investigator: Robert Janssen, Michael Marti Technical Liaison: John Brunkhorst Project Coordinator: Marcus Bekele Panel Members: Anthony Pirkl - Lake of the Woods County Jeff Marlowe - Renville County Public Works Jerry Auge - Anoka County Joe Wilson - Lincoln County Rollin Larson - State Aid for Local Transp Terrence Beaudry - Materials & Road Research Timothy Andersen - Materials & Road Research
