Project Status: Completed
Service: Acoustic Design
Through years of collaborations with Merlin Entertainments, CDC were entrusted to complete a noise impact assessment for the World of Jumanji attraction, the world’s first Jumanji themed land and Chessington’s single largest investment yet.
The project involved the development of a new themed land, with a rollercoaster, children’s rides, and associated buildings and landscaping. The attraction features two smaller rides called ‘Ostrich Stampede’ and ‘Mamba Strike’, with the star of the project being Chessington’s first inversion rollercoaster ‘Mandrill Mayhem’.
The development of such an attraction with a large-scale rollercoaster, required careful consideration of the possible noise impact on nearby noise-sensitive receptors, particularly considering planning conditions set by the Royal Borough of Kingston-upon-Thames.
The assessment aimed to determine the attraction’s operational noise levels and their impact on nearby residential properties and ensure compliance with national standards and local guidance included in planning conditions 10 and 16 of the planning permission (Ref: 21/02435/FUL) with the provision of appropriate mitigation measures if required.
Following the official opening of the attraction on 13th May 2023, CDC visited site and undertook measurements of the operational sound levels around the Jumanji themed land while simultaneously completing sound level measurements at the location of the various receptors around the resort. Conducting the sound survey in such a way allowed the comparison of the sound levels measured within a few meters from the attraction with the ambient and background sound levels at the identified noise-sensitive receptors at the same time of day, to identify possible impacts.
Since noise from the attraction was mostly inaudible at all receptors, a desktop operational noise assessment was carried out, where attraction sound levels were predicted outside the most exposed residential properties. The assessment was based on CDC’s measurements of the operational noise which included noise from all rides, patrons, PA systems and plant noise.
Using the guidance and criteria in the National Planning Policy Framework, Noise Policy Statement for England, BS8233 and BS4142, it was assessed that noise levels would not result in a significant negative impact on the nearby residential areas and therefore no mitigation measures were required.
Image (c) Chessington World of Adventures
