Local Gunflint Trail ‘Mill the Hill’ project begins second phase, expected completion early NovemberThroughout the summer, Cook County residents and visitors have watched the progress of the Gunflint Trail ‘Mill the Hill’ project. In mid-September, the construction project reached a significant milestone with the setting of six 155-foot bridge beams across the Little Devils Track River. While the new bridge is a significant component of the ‘Mill the Hill’ construction project, the second phase of the project includes resurfacing the Gunflint Trail from 5th Avenue near the Gunflint Vue apartments to the ‘Four Corners’ intersection. In the past couple of days, construction crews have begun grading on the shoulder of the Gunflint Trail. The Gunflint Trail will be widened to four lanes from 5th Avenue to the ‘Four Corners’.