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The project involved the design and contract management for the restoration of an open sand & gravel quarry for 'Hanson Aggregates'. The scope of the design covered a series of part restored, active and potential working quarry phases over a number of years. The final scheme was highly commended at the MPA- Biodivesity Awards in 2011.
We designed the contract to ensured that the working method would systematically reinstate land at a lower level using excavated soils. The volumes of workable gravel and sand had been estimated using borehole data (which is not always accurate). Even so, the quantity of restoration soils had to be calculated by carefully analysing the borehole data as closely as possible. The local geology was complex; estimates had to involve careful management of the soil resources, constant re-calculation and adjustments as the work progressed. Detailed negotiation with the Local Planning Authority, relocation of important hedgerows, native tree and hedgerow planting plus accommodation of an established badger sett within the works all have been carefully considered and managed within the scheme.
The planning permission stipulated the site must be returned back to grade 1 agricultural land. We re-design of the topography to create a natural landform typical to the area. The project was very successful and was subsequently submitted for a restoration award in 2010, see below.
The restored Quarry Summer 2009 (Phase III).
Relocated hedgerow & badger sett towards the centre of the image
Soil Movement Diagramme
Many quarries are in sensitive landscape areas such as the Isle of Portland or Exmoor and require detailed and sensitive consideration at all stages of the process from planning through to the final restoration.
We have designed and planned numerous sand, gravel and hard rock quarries across the south of the UK and continue to provide a consultancy service to Hanson Aggregates PLC. These projects have ranges from impact assessments for new sites, planning applications, restoration design, site stripping and restoration contract management.
Biodivesity best practice West Knighton: