Tay

Longest river in Scotland; length 193 km/120 mi, it flows northeast through Loch Tay, then east and southeast past Perth to the Firth of Tay, crossed at Dundee by the Tay Bridge, before joining the North Sea. The Tay has salmon fisheries; its main tributaries are the Tummel, Isla, and Earn, Braan, and Almond.

The drainage basin of the Tay and its tributaries forms one of the most fully integrated hydroelectric developments in the north of Scotland.

The first Tay Bridge, opened in 1878, on the then longest span over water in the world, was blown into the river in 1879, along with a train which was passing over it. The bridge was rebuilt

1883–88, and a road bridge, from Newport-on-Tay to Dundee, was completed in 1966.