Workers from Northland Constructors are replacing utility lines under Superior Street in downtown Duluth, Minnesota, in the first phase of a $51 million reconstruction project slated to take three summers to complete. (Submitted image: Northland Constructors)

Superior Street repairs test Duluth tourism officials

Duluth is gearing up for nearly 19,000 runners to head to the starting lines this weekend for the 42nd Grandma’s Marathon