MARKETS/SERVICES
Introduction
Market Sectors
Services - Buildings
Services - Environment
■	Air Quality Management
■	Archaeology
■	Asset Management
■	Aviation
■	Coastal Management
	■	Cleveleys Sea Wall Reconstruction
	■	Eyemouth Harbour Development
	■	Harrington Seawall
	■	Shoreline Management Plans
■	Contaminated Land
■	Dams & Reservoirs
■	Development Infrastructure
■	Ecology
■	Environmental Engineering
■	Environmental Impact Assessment
■	Environmental Management
■	Environmental Monitoring
■	Flood Risk Management
■	Geotechnical
■	Pipelines and Water Distribution
■	Renewable Energy
■	Sewerage
■	Small Hydro Power
■	Waste Management
■	Water & Wastewater Treatment
■	Water Management
Services - Transportation
Capabilities A - Z

Environment Brochure

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Harrington Seawall

Harrington, UK

Harrington Seawall

Project outline

We were commissioned by the NW Structures Alliance to design a 220m long rock armour revetment, to rectify a failing existing defence that comprised an assortment of concrete, masonry and brickwork. Part of this structure failed in February 2002, when a storm tide removed 124m² of material from behind the revetment.

This railway line is of strategic importance, due to the need to transport spent nuclear fuel rods from Workington docks to the Sellafield Nuclear facility and refined rods back to Workington for shipment overseas.

The general Cumbria coastal frontage is subject to erosion of the mobile sediments, which overlie a wave cut rock platform. The MHWST mark has migrated inshore, allowing greater tidal energies to impact directly onto the near vertical railway revetment.

The rock armour revetment was designed to offer support to the existing defences and reduce wave run-up and reflected wave activity. Therefore the structure crest is set above MHWST level and constructed with limestone rock in the range D50= 1.2m.

The benefit of the reduced run-up and reflected wave activity are immediately obvious, as the mobile sediments began to accrete along the scheme frontage.

Contract value

£0.5m