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The River Liffey flows through the centre of Dublin. Its major tributaries include the River Dodder, the River Poddle and the River Camac. The river supplies much of Dublin's water and a range of recreational activities. It rises in The Wicklow Mountains and flows 125km.

Frank Sherwin Bridge is a road bridge spanning the River Liffey in Dublin. It joins St. John's Road and the south quays from Heuston Station to Wolfe Tone Quay and Parkgate Street on the Northside.
Designed within Dublin Corporation's "Road Design Division", the bridge is a three-span reinforced concrete structure.
Frank Sherwin Bridge was opened in 1982 to remove traffic from the much older and narrower Sean Heuston Bridge. (Sean Heuston Bridge had weight restrictions that prohibited truck and/or bus traffic.)
The bridge was named after Dublin politician Frank Sherwin.