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Places featuresYou are in: Dorset > Places > Places features > Dorset's new gas pipeline ![]() 14 caverns will be dug under the sea Dorset's new gas pipelineIt's one of Dorset's biggest ever engineering projects. Fourteen gas-storage caverns will be dug under the sea at Portland, and will connect to the national grid via an 18km pipeline. A £500m project to create 14 gas storage caverns 1.5 miles (2.4km) under the Dorset coast will now begin work "in July", says the company behind the scheme. ![]() The pipeline will be 18km long The new pipeline will run from Mappowder, north of Dorchester, to Portland, where the caverns to store the gas will be dug under the sea at Upper Osprey Quay. At peak demand times the gas would be piped along the line to connect to the national grid at Mappowder. It's estimated each cavern at Osprey Quay, the former naval base, will take 22 months to dig. ![]() Diagram of how the caverns will store the gas. The first gas will be stored in 2013, with the project complete by 2015, by which time it will store 1% of the national grid's supply. Pump and brineThere will also be a storage area at West Stafford to pump brine into the pipeline and caverns to ensure the vacuum, created once the gas is taken away, is filled. Portland Gas is also setting up a trust for community projects. They include transforming a derelict engine shed on Portland into an interpretation centre and using some of the chalk dug from the caverns to whiten the Osmington White Horse. ![]() Engine shed to be a visitors centre The project, while having the backing of Dorset County Council, isn't welcomed by everyone. The residents of Mappowder, where a pipe storage area will be based, are concerned about the large number of lorry movements driving through their village during construction. Concern was also raised about the construction of the pipeline to be laid under Weymouth Bay in case it should obstruct some of the teams of sailors in training for the 2012 Olympics. last updated: 21/04/2009 at 13:55 Have Your SayWhat do you think of the plans for an 18km gas pipeline under the Dorset countryside and the gas storage caverns at Portland?
Pat Bowdler
Godfrey Broad
Steve L
Bill Woodhouse
C. Holding
Russ O'Callaghan
Ashley Smith
martin cobb
Gill McColl
Steve, Portland
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