The original scheme design included construction of approximately 330m of clay-cored flood banks. This would have involved importing around two thousand tonnes of clay, and three thousand tonnes of primary (virgin) aggregates to use as a fill material.
Using the CEEQUAL process, which is the evidence-based sustainability assessment, rating and awards scheme for civil engineering, infrastructure, landscaping and public realm projects, as guidance, and noting that the distance to suitable material sources meant that works would be associated with significant HGV movements with associated air quality and carbon impacts.
It was therefore decided that a more sustainable solution was required.
Kier’s early contractor involvement enabled a change to the bank design and specification, removing the requirement for a clay core, and allowing for the bank to be built from a single cohesive material.
Using the cohesive fill material, Kier Professional Services (KPS) produced a revised design, establishing the structural properties and incorporating layers of geotextile to reinforce the bank. Approximately 5000t of material was required and, through extensive research, a source was found at a local development site, where excavated material was waiting for disposal. Extensive testing was undertaken and soils from this single site were selected as suitable for the works required.
Early engagement with the Environmental Agency Waste Team and CL:AIRE was required to ensure compliance with the necessary legislation. The earlier this engagement is carried out, the smoother the overall process will be. Thus, soils were imported to Helston under a CL:AIRE MMP established in collaboration with the developer.
This revised process enabled use of soils in the flood banks as a material rather than a waste requiring disposal from the original development site where they were excavated.
In addition to cost savings to our client in excess of £100,000, the use of locally sourced soils at Helston resulted in a reduction of approximately 25,200 HGV miles and associated carbon savings of 20t. There was also a reduction in carbon associated with the original requirement to use primary aggregates of 18t.
Added social value was provided through collaboration with the local developer who saved significant costs by avoiding the requirement to dispose of soils.
Our collaborative relationship with our client and designer in early construction stages enabled the review and subsequent change in specifications to deliver improved environmental and social sustainability outcomes and reduced project costs. The importance of local knowledge and development of working partnerships with other contractors was also critical in delivering these benefits.
While CEEQUAL can help influence sustainable solutions, it is important to involve wider EA teams to aid the CL:AIRE process from an early stage. This has clear benefits to the environment and both the Environment Agency and developer projects should be considered for similar projects where importing large quantities of soil is required.
" Through early review of the Helston project, Kier were able to identify an opportunity to influence the flood bank design and successfully source local material. This has positively contributed to the projects carbon and efficiency targets. A good example of the CEEQUAL and CL:AIRE processes, to be considered for similar projects. "Project Manager Environment Agency
Kier worked as part of Team Van Ord (TVO) to improve the standard of protection provided to 39,741 properties in the towns and villages of Worle, Weston-Super-Mare, Kingston Seymour and Wick St Lawrence by improving the 3670m of earth bank tidal defences lining the Congresbury Yeo Estuary.
Kier worked as part of Team Van Ord (TVO) on The Steart Coastal Management Project which was the UK’s largest coastal management scheme, helping to protect homes and business from flooding due to climate change and rising sea levels.
Kier used our marine expertise to undertake improvement works to St Mary’s Harbour on the Isles of Scilly, located within areas of national and international environmental and ecological protection.
The RAN (Radio Access Network) is the technology used in the UK to allow mobile phones to transmit and receive data and voice services. Ericsson are a leading provider of RAN access to many of the UK’s mobile networks and in 2013, we were appointed by Ericsson to maintain its RAN assets to keep the UK’s 4G and 5G networks live and operational
Replacing eroded concrete along a 40m length of Loe Bar Outfall by spraying concrete on the front and top face of the outfall and around the inspection chamber. The works had to be completed by the end of October 2020.
The development of a CL:AIRE Materials Management Plan (MMP), enabled the use of soils, which would normally be classified as waste, from a local development site within flood banks on the Helston (River Cober) Flood Alleviation Scheme, Helston, West Cornwall.