Watertown Fire Rescue responded to the area of US Highway 212 and 41st St SE for the report of grass on fire in the ditch. Upon arrival, fire personnel found several small spot fires in the south ditch between the four lane highway and the service road near Titan Machinery. Cool temperatures and calm winds kept the fire from spreading to adjacent properties. The fire was extinguished with the use of two wildland fire trucks. The cause of the fire was unknown at the time of extinguishment. Watertown Police Department assisted with traffic control during the incident.