Minnesota Department of Transportation

511 Travel Info

Historic Bridges

Bridge 7423

Bridge 7423

Bridge 7423

See features of the bridge

History and significance

Bridge 7423 is a single-span, reinforced-concrete, through arch bridge constructed c.1917. It formerly carried County Road 421 over the Swan River in Itasca County, but was closed to traffic in 2005 due to the critical condition of its substructure. The bridge is significant as an excellent example of the patented Marsh Rainbow Arch design and for its association with important bridge designer James Barney Marsh.


Little Sand Lake Township (Itasca County)
Latitude, Longitude: 47.20413154, -93.29983159

Bridge features

bridge 7423

Design and construction of the patented Marsh Rainbow Arch with Classical Revival architectural details, including the railing with recessed panel and open balustrade.