River Leven, North Yorkshire River Leven, North Yorkshire The River Leven is a river in North Yorkshire, England, a tributary to the River Tees. It rises on Warren Moor, part of Kildale Moor, in the North York Moors and flows to the north of the moors to join the River Tees at Yarm. The source of the river is on Warren Moor, part of Kildale Moor, just south of the village of Kildale. It flows east until it reaches the Whitby to Middlesbrough rail line where it does a complete turnaround to flow west to Kildale. It then flows south-south-west through woodland to the
Middlesbrough trade gave it the nickname "Ironopolis". On 21 January 1853, Middlesbrough received its Royal Charter of Incorporation, giving the town the right to have a mayor, aldermen and councillors. Henry Bolckow became mayor, in 1853. On 15 August 1867, a Reform Bill was passed, making Middlesbrough a new parliamentary borough, Bolckow was elected member for Middlesbrough the following year. For many years in the 19th century, Teesside set the world price for iron and steel. The steel components of the Sydney Harbour Bridge (1932) were engineered and fabricated by Dorman Long of Middlesbrough. The company was also responsible for the