The Lower Course of the River Tees

The lower course of the River Tees begins at the market town of Yarm in North Yorkshire, England. From there, it flows eastward approximately 20 km to the North Sea.

Key Characteristics

• Tidal: The river is tidal from Yarm downstream; the Tees Barrage (completed 1995) now controls the tidal limit upstream.
• Industrial Landscape: Banks are lined with heavy industry—chemical plants, steelworks, and the Teesport complex, one of the UK's major ports.
• Iconic Landmark: The Tees Transporter Bridge (1911) at Middlesbrough, a rare working example of a gondola bridge, symbolizes the region's industrial heritage.
• County Boundary: The estuary (Tees Bay) forms the historic boundary between North Yorkshire (south) and County Durham (north).
• Wildlife: Despite industry, the estuary supports seal colonies, migratory birds, and recovering fish populations.

The lower Tees exemplifies a heavily modified industrial estuary with ongoing ecological restoration efforts.