“Imagine a bridge not just as a crossing but as a gateway through time.” That’s exactly what the Third Avenue Bridge is. Originally known as the St. Anthony Falls Bridge. This landmark in Minneapolis carries traffic over the Mississippi near Saint Anthony Falls.
Let’s dive into its story. Construction started in 1914. It opened four years later in 1918. The Third Avenue Bridge wasn’t just any bridge. It was designed by city engineer Frederick W. Cappelen. He also designed other Minneapolis bridges. Its cost was US$862,254.00.
Notice the shallow “S” curve? That’s not an accident. It was built to avoid fractures in the limestone bedrock. This bedrock supports the bridge piers. The bridge uses Melan arches of an open spandrel design. This design was quite innovative for its time.
The Third Avenue Bridge uses a concrete reinforcing system. Metal I-beams curved to the form of the arch are embedded in concrete. It has five concrete arch spans. Each span is carried by three arched ribs. Classical Revival detailing adds to its beauty. This includes an ornamental metal and concrete railing added in 1939.
The reverse S-curve wasn’t just practical. It produced an aesthetic form. This added to the bridge’s image as a gateway to downtown Minneapolis. The Third Avenue Bridge stands as the last major reinforced-concrete Melan arch bridge constructed in the Twin Cities. It is a contributing element to the St. Anthony Falls Industrial Historic District.
Over the years, the Third Avenue Bridge has seen its share of renovations. A major overhaul took place in 1979–1980. Another restoration occurred from 2020–2023. This extended its life by 50 years. Improvements included a new deck, barriers, railings, and lighting.
Preserving its historic design elements was a key goal during the 2020-2023 restoration. The character-defining Melan arches received extensive repairs. Cathodic protection was added to reduce further chloride deterioration. Spandrel columns were replaced. New spandrel cap beams closer to the original design were installed.
The Third Avenue Bridge is more than just concrete and steel. It’s a symbol of Minneapolis’s history. Its arches echo the city’s resilience. Its design reflects an era of innovation. So, as you cross this bridge, remember its story. Remember the visionaries who built it. Remember the countless journeys it has facilitated. It is a true gateway to downtown Minneapolis.