[2][3] The old route from Inveraray to the Firth of Clyde involved travelling down Loch Eck, then crossing the River Eachaig to get to Dunoon – Mary Queen of Scots went this way in 1563.

[4] Around 1835 David Napier built a road from Kilmun pier to Loch Eck as part of the "new route to Inveraray", and at this time the ferry was replaced by a wooden bridge.

This in time needed replaced, and around the end of 1884 the Trustees of the Dunoon District of Roads, Argyllshire, arranged for engineers and contractors to construct a new malleable iron girder bridge spanning 70 feet (21 m) over the river; this bridge was completed in May 1885.

[4] It is a single-span wrought iron double warren lattice truss bridge, spanning between abutments at each end with splayed stone parapets.

You can help Wikipedia by expanding it.This article related to a river in Scotland is a stub.