River Mardyke

The Mardyke is a small river situated in the south of Essex in the borough of Thurrock. Its headwaters lay between Great Warley and Little Warley at Holden’s Wood, and flows for around 17km before joining the River Thames at Purfleet.

Historically the Mardyke was a vital connection between the River Thames and the inland fens to the northeast of the county.

This map shows the current projects; potential, in progress and completed, for the River Mardyke.

Project status




    In progress



Click or tap a number to view the project details




The South Essex Catchment Partnership is made up of a variety of organisations who share a common aim to work collectively to improve the rivers, streams, lakes and marshland within the South Essex catchment; making them cleaner, more accessible and more attractive, to benefit local communities and wildlife.

The flood plain grassland, which is managed through horse grazing, has little to offer in terms of habitats for aquatic species. The channel is very steep banked, wide, straight, no tree cover and little bankside vegetaion.

To work with Thurrock Counci and the tenent grazier to look at the current management of the grazed area and address any problems that are impacting on the grassland and aquatic communities.

Website key stakeholders:

Environment Agency logo      Essex Wildlife Trust logo           ESWT Logo 70

Design by LTD Design Consultants and build by Garganey Consulting based on an original concept by Herts and Middlesex Wildlife Trust