A petition against the £15M Hampstead Heath dams project has been signed by more than 8,000 people.
The project, designed to prevent the dams, that form the ponds, from failing in extreme rainfall, is due to start in January.
The works involve the removal of vegetation and trees, before the enlarging and building of new dams and spillways starts and continues until October 2016.
The petition, started by campaign group 38 Degrees, and supported by several local pond-user groups, calls for Camden Council to reject the planning application submitted last month.
“The City of London’s proposed dam works on Hampstead Heath will permanently disfigure the heath and not eliminate the risk of downstream flooding or loss of life, which the City of London claims these proposals will address,” says the petition.
If the scheme goes ahead, 12 ponds across the heath will be worked on for between up to 33 weeks each, with the bathing ponds each closed for at least three months.
Bam Ritchies carried out ground investigations earlier this year, as part of a City of London consultation on the works.