The Flat Bridge is a beam bridge across the Rio Cobre on the A1 road connecting the Jamaican capital Kingston, with the north coast tourist areas of Dunn's River and Ocho Rios.

Edward Long describes it in his History of Jamaica printed in 1774:[1] This bridge is flat and composed of planks on frame of timberwork which rests upon two piers and two buttresses projecting from the banks, constructed with piles and braces interlaced with masonry.When the bridge was being constructed, the sixteen plantations in the Bog Walk area were obliged to send one slave in every fifty to work on the River Road, sometimes called Sixteen Mile Walk.

Slaves often lost their lives as they performed dangerous tasks in the Gorge.

Contracts for timber and for masons to work on the bridge were authorized at vestry meetings.

In such times, motorists are advised to take alternative routes through Barry and Sligoville.