Tallest Structure in Duluth

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.

34 thoughts on “Tallest Structure in Duluth”

  1. As far as I know, the Alworth Building at 306 W. Superior St. has been Duluth’s tallest building since its construction in 1910. It is 16 stories tall; 247 feet.

    But is there a taller structure? Maybe one of the radio towers.

  2. I thought the phone company tower thing was tallest. It’s got the microwave dishes and what-not. I have also been known to ride a particularly high horse which might be in competition…

  3. I think the new PDD building can win this if you guys just put a giant King Kong/Fay Wray on top of the roof. Plus it will look really cool.

    On the other hand, that bear that Baci saw is pretty tall too, so you may have some stiff competition.

  4. Great info here! I had no idea the Alworth Building had such fame. It was the tallest building in Minnesota (eclipsing Minneapolis and St. Paul buildings) for several years. Go Duluth tycoons!

    The PDD building will look great in downtown Duluth. But it would look better as a floating island just off of one of the empty slips in West Duluth.

    I can’t say I’ve every really noticed that cement silo, now I’ll pay more attention to it — base jump anyone?

    When I was asking this, I was hoping to find the height of the tallest tower and building. Accomplished.

    Only one question of mine is still unanswered. What is the height of the Bong or the Blatnik from the base of the structure under the bay to the highest point? I’m thinking it’s higher than 284 feet.

  5. Ok, so between the two, the Blatnik is the obvious winner. It is listed as 123 feet above the water—but that’s just water surface to bottom of bridge, clearance. What is the total height?

  6. Wikipedia says the Blatnik Bridge is 120 feet above the water. That’s probably just the clearance height underneath, not the height to the top of the arch.

    No height is listed on the Bong Bridge entry, but this site lists it as 120 feet as well. Further down on the page, it claims that the “bridge deck” is 150 feet above the water, and that “the top of the arch is approximately 75 feet above the highway deck.” So I’m guessing the Bong Bridge is approximately 225 feet high at its highest point and that the Blatnik Bridge is roughly the same.

  7. @Barrett, I think that is short of what it used to be then. I remember it fell in 1991, and Wiki lists it as being …

    283.3 meters at the time—850 feet tall.

    Wow. From the Wiki clip: “the DNR reported that four million pine trees were damaged or destroyed.”

    If a radio tower falls and no one is around to hear it, does it make a sound?

  8. That page lists the old tower at 259.1 meters, which is 850 feet. Hm. Seems like some kind of mixup in all of this but you had the right number of feet the first time.

    At any rate, it seems clear that the tallest structure in Duluth is by far the WDIO transmission tower. The tallest structure that has ever stood in Duluth is the old WDIO tower that fell in the spring of 1991. The tallest building is the Alworth Building. And the tallest bridge is still up for debate, since the Bong and Blatnik bridges seem to be pretty close in height.

  9. The Blatnik bridge is approx. 210′ from the highest point to the surface of the water. The Bong bridge is approx. 209′ from the highest point to the surface of the water. Estimated using LiDAR data from the MN Elevation Mapping Project The shipping channel is approx 30′ deep under both bridges.

  10. @pinkos, correct.
    @matty_pizza, great info.

    I’m really surprised that the Blatnik is the shortest of all these structures.

    I think we have it now. Here’s a chart.

    We didn’t miss anything out at the airport, did we?

  11. The highest point of the Aerial Lift Bridge is approx. 229′ above the surface of the water. Again, the shipping channel is around 30′ deep under the bridge.

  12. Going back to the first comments on this post…I wonder if the new PDD headquarters will actually be taller than the Alworth building. The sketches show a tall, pointy roof thingamajigger (technical term) that looks like it could certainly be more than a story tall. It will also depend on how tall each story ends up being — stories are not a universal measurement.

  13. A new upset! I just heard back from an MDOT D1 Bridge Engineer. This is what he had to say:

    I heard you were inquiring on the height of the Blatnik Bridge. It is 251 feet from the bottom of the main channel piers to the top of the arch, not including piling. Or assuming the commonly used “average” St. Louis river water elevation of 602 feet it reaches about 211 feet above the water level.

    The Bong Bridge is a close second with a total max height of 250 feet, with about 209 feet of that above the water level.

    This upsets our previous chart, making the Blatnik Bridge taller than the Alworth Building. The revised list:

    I wonder what the tallest residential building in Duluth is …

  14. According to this list, the tallest buildings in Duluth are:

    1. Alworth Building (247)
    2. Medical Arts Building (191)
    3. Greysolon Plaza (190)
    4. Wells Fargo Building (152)
    5. Sheraton Duluth & Condominiums (140)
    6. Board of Trade Building (136)
    7. US Bank Place (120) 

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