Sherford: Foul Pumping Station Attenuation Tank

Our team has been busy delivering the latest Foul Pumping Station Attenuation Tank on phase 3AB at Sherford. This marks the third structure of its kind installed on this project by the Groundfix team to date.

This particular attenuation tank measures an impressive 28m long, 8m wide and 2.2m high, providing an estimated storage capacity of approximately 240m³.

The scale of the structure is significant:

• Precast concrete external walls weigh just over 60 tonnes
• Precast internal walls and flow channels add almost 18 tonnes
• Roof slabs contribute a further 52 tonnes

That’s close to 130 tonnes of precast concrete forming this structure alone.

Following comprehensive testing to ensure the system operates exactly as designed, the surrounding area will be carefully backfilled. Once complete, the attenuation tank will begin its vital role in managing wastewater flows from this new phase of development into the wider sewage network.

A fantastic effort from the Groundfix team!

What is a Foul Pumping Station?

A foul pumping station collects wastewater (from toilets, sinks, showers, etc.) when gravity drainage isn’t possible — typically where a development sits lower than the existing sewer.

What is an Attenuation Tank?

An attenuation tank is a storage chamber installed either upstream or integrated into the pumping station system. Its purpose is to control peak flow rates, provide emergency storage, prevent sewer surcharging, reduce flood risk, and meet sewer authority adoption standards.