Portsmouth Water plans bulk supplies with neighbouring companies
Portsmouth Water has published its Water Resources Management Plan (WRMP) covering the next 25 years, which includes provision for renewing an existing bulk export supply deal and introducing two others.
WWTonline spoke to Paul Sansby, a Portsmouth Water planning engineer involved in compiling the document, who summarised the bulk export aspects of the plan.
Sansby said the WRMP envisaged renewing an existing bulk supply deal to Southern Water, which came out of previous water resources planning rounds. The document points out this will be contingent on reconfirmation of the current licence.
The supply goes out of Portsmouth Water’s eastern end – across from the South Downs to Hardham Treatment Works, which has a maximum capacity of 15Mld. It has a constant flow of 1Mld. “Usually they take the 1Mld and if they need it they take the full amount,” Sansby said.
“The new plan includes that bulk supply continuing. So we would enter into another agreement with Southern Water.”
Sansby said the new WRMP introduced two further bulk supplies – one to Southern Water at the western end which was due to start in 2017 and one for South East Water in 2039/40.
The WRMP also lays out a new bulk supply plan to Southern Water going from the western end of Portsmouth’s distribution system on the River Itchen for 10Mld which Sansby said would be subject to variation as time progressed.
Sansby said: “We may ultimately supply more water at that end. That’s earmarked for 2017. We are starting to plan it now and constructing it in the next couple of years.”
South East Water has formally requested a bulk supply from Clanfield Service Reservoir to Tilmoor Reservoir in Petersfield, with construction of the bulk supply split between both water companies.
The route crosses the South Downs National Park. “We’ve been looking at that route in terms of minimising the impact. When it comes forward for actual construction on a pipeline between our distribution system and South East’s, we would repeat that work,” Sansby said.
He added that it was not certain this would go ahead because South East Water’s plans might change and it was a long time in advance and subject to the five-yearly cycle of repeating the WRMP.
The WRMP also details how leakage will be reduced, the promotion of water efficiency and protecting the environment by reducing the water abstracted.
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