Low Hedgeley is a former sand and gravel extraction site in north east England. The site had been formerly restored to a mixed nature conservation / agricultural afteruse, however the land owner wanted to explore opportunities for increasing the biodiversity value of features at the site, namely a steep sided island. Nature After Minerals advised on best practice island design and scrape creation. Works have begun, and the re-profiled island is already attracting bird interest with oystercatcher and little grebe recorded breeding in 2014.
Retrofitting island features
Potential best practice
Retrofitting features to a restored site to improve biodiversity value
Low Hedgeley is a former sand and gravel quarry in Northumberland. Post extraction, the site was restored to a mix of nature conservation and agricultural after uses. The restored site is situated within the Hedgeley Estate, which extends to 1,640 Ha and is owned by the Carr-Ellison family.
Nature After Minerals was asked by the landowner to provide some specialist advice on how the existing restored gravel pits could be improved for wildlife.
Opportunities identified by RESTORE
Techniques on creating habitats have evolved considerably in recent years, hence the quality of mineral site restoration is continually improving. However, there is a legacy of older restorations that, while they offer some nature conservation benefit, do not now fulfil their full potential. Low Hedgeley restoration includes agricultural, and a lake with a steep sided island (Figure 1). This is a similar case to the now Lancashire Wildlife Trust nature reserve, Brockholes, where steep sided islands were also included in early restoration plans.
The relatively light touch ground works proposed for Low Hedgeley could greatly enhance the value of the island to in particular wetland birds including lapwing, ringed plovers, and little ringed plovers.
Why Low Hedgeley fitted RESTORE objectives:
Engaging at an early planning stage is important for ensuring high quality restoration and long-term management plans / funds are secured. The legacy of restoration schemes that don’t achieve their now full potential like at Low Hedgeley can be redressed by retro-fitting ecological features, like reprofiled islands design working directly with the post-restoration landowner.
Second phase of ground works were completed.
Our response and suggestions
In consultation with the landowner, and using similar works at Lancashire Wildlife Trust’s Brockholes site, advice focussed on two enhancements: island re-profiling and scrape creation. These would increase the site’s potential to support wetland bird specialists.
How this best practice is transferable
Extractions often result in large deep bodies of water, without features like islands. Low Hedgeley retro-fit gave rise to a set of guiding principles for island design, and options for including artificial tern rafts or floating islands for where water is too deep, or there is no suitable overburden to develop natural islands. This has already been used to guide work at Whitesands Quarry, and was shared with a local authority ecologist to inform the quality of other restorations.
This case study demonstrates the importance of working with landowners to secure the long-term viability of biodiversity enhancements retrospectively. It also highlights a potential conflict between agri-environment grants and biodiversity outcomes. It presents a strong case for better understanding of the dual benefit of ephemeral shallow water areas providing grazing for cattle and the role of cattle in maintaining wetland habitats.