Portrack Marsh Nature Reserve

Portrack Marsh Nature Reserve is a 50 acres (20 ha) reserve by the northern bank of the River Tees between the Tees Barrage and the Tees Viaduct, near Portrack housing estate in Stockton-on-Tees borough, County Durham. It is the last remaining wetland on the lower Tees. The site is bounded by Marston Road, a disused railway line, the Northumbrian Water's waste water treatment site, the River Tees, the Tees Barrage White Water Course, the grounds of The Talpore pub and a Tees Barrage access road. Ownership of the reserve is split between Tees Valley Wildlife Trust and Northumbrian Water but the reserve is managed by Tees Valley Wildlife Trust. The reserve has mature marsh in the west and north, and artificial ponds make up the remaining portion. The site is at an altitude of 10 metres (33 ft) over datum.