UndersealsStatus: CompleteReport Date: 10/07/2025 Summary: Underseals, often referred to as Texas underseals because of their origin there, are being used in other regions, including Minnesota. However, their use has been limited and relatively undocumented. A few agencies in Minnesota, such as Hennepin County, City of Eden Prairie, and City of Lakeville, have implemented underseals on select projects. The objective of this project was to survey Minnesota and neighboring state agencies - using MnDOT’s National Road Research Alliance network to develop a database of bituminous underseal projects. The study aimed to synthesize information on usage, cost, timing, benefits, drawbacks, and performance. Final Deliverables: Underseals (Report #2026RIC02) Related Materials: Related Research: Project Personnel: Principal Investigator: Michael Marti Co-Principal Investigator: Susan Miller Technical Liaison: Benjamin Worel Project Coordinator: David Glyer Panel Members: Alex Jordan - Andrew Wrucke - University of Minnesota LTAP Ashton Kogel - City of Eden Prairie Carter Schulze - City of Eden Prairie Chad Wilde - Blue Earth County Jeremy Gilb - Chippewa County Highway Joel Ulring - Materials & Road Research Joseph Podolsky - Materials & Road Research Josh Peterson - City of Coon Rapids Marcus Culver - City of Brooklyn Park Mark Ray - City of Burnsville Paul Nolan - Materials & Road Research Ryan Glynn - Blue Earth County Steve Ferraro - City of Lakeville Timothy Clyne - Metro District Todd Broadwell - District 8