Articles & Case Studies


Posted: Monday 26th November 2018

Pump hire specialist, Sykes Pumps, has provided an over pumping solution to enable a road underpinning project in Cumbria that will protect the local infrastructure from the threat of damage from flooding.

The B5292 road to Keswick at Braithwaite Common in Cumbria runs parallel to the Coledale Beck for an 83 metre section and the road network suffered significant damage during Storm Desmond in December 2015, leaving residents cut off and limiting access to Keswick across the rural road network.

Carried out by Eric Wright Civil Engineering on behalf of Cumbria County Council, a three-month road underpinning project is now on site, designed to provide robust flood resilience as part of a suite of measures targeted at reducing the impact of any future severe weather events in the area.

Eric Wright Civil Engineering has been granted permission to dam the Beck by the Environment Agency and Sykes Pumps has provided two PX30N electric submersible pumps for the project which have been installed to over pump the water via a 12 inch steel hose from the site of the temporary dam to a downstream location beyond the road improvement project.

The Sykes Pumps PX30N units are specifically designed for high flow and high head dewatering applications and each is capable of a flow rate of up to 300 litres/second. The over pumping solution designed by Sykes Pumps will enable the flow from both pumps to be channelled through a single hose with the option to add a third pump to the configuration should water levels rise significantly during November and December. The system has been installed with ultra-sonic controls, enabling the flow rate to be adjusted in line with conditions, ensuring that optimum water levels are maintained in the Beck at all times.

Explains John Rajkovic from Sykes Pumps: “The over pumping solution is there to enable the works and ensure a safe working environment for the Eric Wright Civil Engineering team throughout the 15 week programme, however, it’s also been designed to ensure that the Beck is protected by preventing the water level from rising or reducing too much.

“We have achieved this by incorporating three-variable speed drive panels in the specification with ultrasonic controls to adjust the amount of water pumped in real time in parallel with weather conditions.”

Due to complete by the end of December, the project will protect the road from future flooding by introducing a drainage channel below the road surface. Eric Wright Civil Engineering is excavating the road a section at a time and inserting 700mm steel rods into the bedrock at 600mm intervals before casting a concrete deck and retaining wall. The excavated area will then be backfilled using concrete aggregate before a new road surface is reinstated.

Comments John Reilly from Eric Wright Civil Engineering: “The close proximity of the Beck not only makes this stretch of road vulnerable to flooding but also creates potentially challenging working conditions for delivery of this complex project.

“The solution provided by Sykes Pumps ensures that we can be confident of a safe and dry work area throughout the programme - regardless of what the Cumbrian winter throws at us – while ensuring we deliver on our environmental commitment to protect the Beck throughout the works.” Normal 0 false false false EN-US X-NONE X-NONE

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