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Case study

When developer Barratt wanted to build 350 homes at Alma Dettingen Barracks, Deepcut, Surrey, Thames Water imposed a strict maximum surface water discharge rate of 5 litres/ second to avoid overloading the current system in times of heavy rainfall. Consultant Hemsley Orrell Partnership was called in and, together with Thames Water, developed a sustainable rainwater proposal to manage the run off. One natural advantage was the gravelly sand matrix substrate which permitted natural percolation.

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