United Utilities' massive new underground storage tunnel system at Preston protected the town against flash floods which resulted from a torrential downpour on Tuesday.
For the first time since United Utilities’ massive 3.5km long underground storage tunnel was switched on, engineers from United Utilities had the chance to see it fully tested this week when heavy rain led to flash flooding in Preston.
The new underground storage tunnel, capable of holding 40 million litres of storm water which took four years to construct was working at full capacity.
During the height of the storm the tunnel was pumping 1,500 litres of storm water per second to Preston Wastewater Treatment Works.
Louisa Simpson-Brown, from United Utilities commented:
“We really saw once again the environmental benefits the tunnel is having, by storing storm water which otherwise would have spilled from outfalls at Preston docks into the river.”
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