The new bridge over the River Leven, which carries the A814, was built as part of the Dumbarton Inner Relief Road. It is a fairly typical late 20th century concrete structure which was completed in 1974 per the 1974 Scottish Development Department Report.
There are 5 box girders across three spans carrying the roadway. It was Stage 1 of the Relief Road and was built following the clearance for redevelopment of the Artizan area of Dumbarton. It provided a bypass for the narrow and congested old bridge. Despite the approaches from either side being dualled, the bridge is only a single carriageway. The A82 had long since been diverted to the north, but with so much traffic crossing the Leven every day all of the bridges were jammed with traffic at peak times.
