Fixing the leak(Photo by Monica Isley) City workers remove the structure that keeps the walls from caving in as they dig into the intersection of 7th Avenue and 7th Street. Dale Wick said a fire hydrant was leaking far below the surface, and would need to be replaced. Getting to the root of the problem involved severing the storm sewer pipe, and chaining the base of the traffic light to keep it upright. Traffic lanes have been blocked and remarked temporarily. The work is expected to continue Tuesday and Wednesday at least.