north of the park on the long Colne Valley Viaduct.The viaduct is designed to resemble the flight of a stone skipping across the water. In October 2017, activists set up a protest camp at Harvil Road to oppose the construction. The protesters documented alleged environmental damage by HS2 workers over an eighteen month period, voicing concern about the destruction of wildlife habitats and the possibility that an aquifer supplying drinking water might be affected. In relation to water quality HS2 has stated "Over the last six years, HS2 has worked closely with Affinity Water and the Environment Agency to monitor water quality and agree working methods.These will be monitored by a team of specialist engineers during construction in order to protect the natural environment." In May 2019, the Woodland Trust called for the clearance of trees at Colne Valley to be halted while the project was under review. In January 2020, HS2 began evicting the protest camps. A couple living in a farmhouse on the route of the railway lost a seven-year legal battle in July 2020 and were compelled to move out after HS2 Ltd compulsory purchased their home on Dews Lane. The first of the viaducts piers was cast in December 2021. The park also believes it is threatened by other proposals including motorway service stations, ‘technology parks’, Pinewood theme park and housing. Sub-areas The park includes Denham Country Park, which is a Local Nature Reserve, and Frays Farm Meadows and Denham Lock Wood, which are Sites of Special Scientific Interest managed as nature reserves by the London Wildlife Trust. Notes and references Notes References External links Official website Parks and open spaces in Buckinghamshire Parks and open spaces in the London Borough of Hillingdon Parks and open spaces in Hertfordshire Parks and open spaces in Berkshire Parks and open spaces in Surrey Regional parks of the United Kingdom High Speed 2