A protected old-growth forest of red and white pine trees, located in the Minnesota Department of Natural Resources’ Scientific and Natural Area, was growing into the approach and departure surfaces at the Duluth Sky Harbor Airport. The path had to be altered.
To accommodate the protected forest, the SEH team came up with a solution to shorten and rotate the runway. Because this adjustment placed the runway into Superior Bay, a berm was built and back-filled to support the new runway.
Sky Harbor Airport Runway Relocation
City of Duluth