Major engineering work took place at Endcliffe Park in 2004-5, to reduce the impact of overflows from the sewage system under storm conditions, and to reduce the likelihood of flooding on the lower river. In September 2014 Sheffield City Council announced plans for a flood alleviation scheme on the Porter Brook and its tributary the Mayfield Brook. It was planned to create floodwater storage areas at Mayfield, Whiteley Woods and Endcliffe Park while parts of the watercourse would be contained by walled defences downstream of Endcliffe Park. The work on the Porter Brook and the Sheaf was costed at £12.4 million, and was part of a larger project costing £56 million. Work started in 2015, and was expected to be completed in 2021.