How is it going to be done?

Programme of Works

>Start on Site November / December 2006
>Cofferdam works January 2007 - January 2008
>Cofferdam Earthworks February 2008 - March 2008
>Concrete works March 2008– October 2008
>Building works October 2008 – January 2009
>Pumps / M&E January 2009 – May 2009
>Remove cofferdam / channel works July 2009 – Sept 2009
>Demolish existing pumping station Sept 2009 – Dec 2009
>Clear site Jan 2010

Typical Structure

The new structure will consist of bored pile foundations with concrete base incorporating the Volute forms which direct the water into and out of the pumps. A reinforced concrete structure will be built to support the pumps and contain the fuel tanks and generators - one for each of the six pumps. A steel frame structure will be built on top of the concrete works to house the control systems, office and welfare facilities. The front of the building will be fully glazed to show-off the magnificent pumps - the second biggest in Europe.

Full section

Cofferdam

To build the new station we have to install what is known as a 'Cofferdam.' But what is a cofferdam?
It’s a wall to keep things out of a hole - in this case water - whilst building something.
It allows work outside of low-tide conditions.
It allows safe working inside a hole.
It is usually constructed of steel sheet piles.

But why do we need a cofferdam?
The existing pumping station has to remain operational.
The new pumping station has to be on the line of the existing channel.
It keeps the North Sea out of Norfolk.

Plan view of the cofferdam
Plan view of the cofferdam

The cofferdam from the old pumping station
View of the cofferdam from the old pumping station
Inside the cofferdam
Inside the cofferdam


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