Infiltration Under the Gardens of Yorkshire Homes

For a new 32 home development in the little Wolds town of Market Weighton, East Yorkshire, Barratt York Ltd was required by local planners to ensure that the stormwater runoff did not exceed the discharge consents for the area.

Consultant Engineer Carl Cawthorne of Building Design (Beverley) Ltd specified Hydro International’s Stormbloc® modular blocks to provide essential soil infiltration and avoid the requirement for storage or the control of discharge into a watercourse.

Thirteen individual infiltration sites using 150 m3 of Hydro’s Stormbloc® have been installed at the development, over the stony gravel sub-soil, which facilitates infiltration.  The soakaways are grouped to accept runoff from the roofs, driveways and access roads of the new development.

Carl Cawthorne commented: “Stormbloc® is much more compact, with a higher volume than conventional linear trench with gravel, and it has inspection and maintenance facilities.”

Derrick Finney, Project Engineer of Barratt York, said: “It was easy to install – we have sited the Stormbloc® soakaways under the gardens so as not to use up valuable building space.”

Stormbloc® is available in eco-green polypropylene 800 x 800 x 663 mm blocks providing high volume water storage with a 95% void ratio.  The system is designed so that, when installed, a 222 x 570 mm cross-section access tunnel runs through the blocks.  This can be accessed easily by CCTV or a high pressure jetting hose inserted to shift any accumulated sediment, silt or debris in the system should the need arise – a feature which sets it apart from its competitors.

Read the full Market Weighton case study

Learn more about Hydro Stormbloc®