The planting and design of the 12 hectare external environment to this important secure facility includes large scale landform and waterbody construction.Terra Firma detailed both the hard and soft landscape across the wider parkland areas, and the complex building curtilage.  The site was a former colliery with complex site soil issues. Terra Firma and sub consultant Tim O’Hare successfully put together a strategy for the amelioration and reuse of soils on site, negating the need for large scale import of new materials.Sustainable drainage systems were key to the scheme and the work included the design and formation of swales and drainage systems in accordance with best practice.The external design included large scale car parking areas, circulation routes and access, all designed to be fully accessible to all. Large scale planting areas include a wide variety of native woodland and locally appropriate planting, with a more ornamental scheme within the immediate building curtilage. BAA guidelines on planting were adhered to throughout the scheme.The project was completed in Autumn 2008 and the building officially opened in February 2010. Terra Firma continues to be involved with overseeing the long-term management of the grounds.