Property Record
US 535 (HAMMOND AVE) OVER SUPERIOR BAY
Architecture and History Inventory
| Historic Name: | Duluth-Superior High Bridge, John Blatnik Bridge |
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| Other Name: | Blatnik Bridge |
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| Reference Number: | 157201 |
| Location (Address): | US 535 (HAMMOND AVE) OVER SUPERIOR BAY |
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| County: | Douglas |
| City: | Superior |
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| Year Built: | 1961 |
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| Additions: | |
| Survey Date: | 198320192022 |
| Historic Use: | deck truss bridge |
| Architectural Style: | NA (unknown or not a building) |
| Structural System: | |
| Wall Material: | Metal |
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| Demolished?: | No |
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| National/State Register Listing Name: | Not listed |
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| Additional Information: | First bridge built in Duluth-Superior that did not need to be opened for marine traffic. Total length is 1,140 feet. 2022: The Duluth-Superior High Bridge, also known as the John A. Blatnik Bridge was completed in 1961. As part of the Interstate Highway System, it carries I-535 east from I-35 in Duluth. The bridge is 7,975 feet long and is comprised of 52 spans. The main three-span continuous-truss section includes a 1,140-foot-long center span rising 120 feet above an important navigation channel where the Saint Louis River empties into Superior Bay. The bridge has 34 steel-beam approach spans on the Wisconsin side stretching a total of 4,816 feet and 15 spans on the Minnesota side extending 2,019 feet. |
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| Bibliographic References: | Superior Intensive Survey See D-S Harbor Survey Map #92 |
| Wisconsin Architecture and History Inventory, State Historic Preservation Office, Wisconsin Historical Society, Madison, Wisconsin |