Duluth, MN (Northland's NewsCenter) -- Potholes are a pain in the suspension to drivers throughout the Northland so the researchers at U.M.D.'s Natural Resources Research Institute are trying to do something about the problem.
Several experimental pothole filling techniques were tried out on Duluth's Grand Avenue Wednesday.
Holes were patched using a taconite compound after the ground was warmed with new technology.
One truck mounted an infra-red heater and another featured a microwave unit.
According to people from NRRI, the microwave heater poses no risk to the workers operating it.
"It's safe. There's shielding that's provided around the base of the microwave unit. We have a microwave leak detector that makes sure everything is operating as it should be," said Larry Zanko of NRRI.
If the new pothole filling technology proves to be feasible, N.R.R.I. spokespeople hope it brings more jobs to the Northland.