Flood Risk Assessment, Stockton on Tees, Middlesborough
Aug 27, 2014

A Flood Risk Assessment has been completed by RAB Consultants in accordance with National Planning Policy Framework in support of planning proposal in Stockton on Tees, Middlesbrough. The planning proposal includes the removal of two modular buildings and the construction of one replacement of a modular building on an industrial site.

Our assessment to meet the requirements of the National Planning Policy Framework involved:

  • Site visit to establish the flood risk to the site and within the local area;

  • Data collection, including the Environment Agency’s most recently modelled flood data for the river Tees;

  • Liaison with the Environment Agency, Stockton on Tees Borough Council and Northumbrian Water; and

  • An assessment of the risk of flooding from all sources including fluvial, surface water, groundwater and drainage related.

The site is located within Flood Zone 3 in accordance with the Environment Agency’s Flood Map for Planning (Rivers and Sea). It is situated between two main rivers and approximately 9 kilometres upstream of the river Tees estuary mouth. The site was therefore assessed for both fluvial and tidal flood impacts.

Flood waters from the river Tees inundated the development site in December 2013 to approximately 0.5 metres.

The site is not shown by Environment Agency data to be located within an area benefitting from flood defences and significant inundation is expected at the site during the 1 in 200 year flood event. It is considered unreasonable in the report for finished floor levels to be raised above this flood level and flood resistant measures thought to be unsafe due to potential excessive water pressures on the buildings. Flood resilient measures were therefore recommended for this building where possible and practically reasonable.

A flood warning and evacuation plan is included in the assessment ensuring that all staff and visitors to the site are aware of the flood risk and indicating the most appropriate evacuation route to higher ground in Flood Zone 1 in times of flood.

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