Here’s a question to contemplate: What is the tallest standing structure within Duluth city limits?
Here’s what I was thinking for determining this: The tallest height should be relative to the starting point of the structure in the ground. So a structure that begins on a higher elevation does not have advantage. Also, “ground” can be defined as the Lake bottom, so a structure could begin on the Lake bottom, but the footings (or anything underneath the ground [or Lake bottom]) wouldn’t be part of the equation.
The Duluth Arial Lift Bridge is pretty high (177 feet), but other higher buildings and structures are clearly in view.