Work is now underway at Stock Pond and will continue until January 2016. During this time there will be path closures along the causeway – we apologise for any inconvenience.
Stock Pond is one of the smaller ponds on the Heath and the top pond in the Highgate Chain under City of London management. There are two additional ponds within the Kenwood estate which are ultimately the top of the Highgate Chain. Although Stock Pond is a small pond, because of it’s location it has a large area or catchment which feeds into it. This means it is one of the most liable to flooding on the Heath. In 2010 during a large storm, water overtopped the dam and caused some erosion.
Stock Pond is one of the more natural looking ponds on the Heath and because of this, there was a strong feeling from stakeholders that it should be treated sensitively and large scale works should be avoided. The designers kept this in mind when they came up with proposals, however because a spillway (a means of allowing water to leave the pond safely in the event of a flood) was required, a number of trees (24 in total) had to be removed from the western edge of the dam. Alternative options to the spillway, such as a buried concrete culvert, were considered but this would have resulted in a large concrete structure in the pond which would have been quite out of place in the surroundings and would have been difficult to screen from view.
The spillway will be grass lined and 21m wide at it’s base. In addition the dam needs to be raised by 500mm and a new overflow pipe installed next to the current pipe. The pond is also to be desilted which will help improve water quality, as will the additional reed planting which is due to take place. Although the tree removal was an unfortunate consequence, it does have the benefit of allowing views into the pond and allowing light in which again benefits water quality and aquatic life.
Below is a link to the Environmental Masterplan which has the location of the spillway (marked in bright green) as well as the other details of the work taking place here.
The following before and after pictures of Stock Pond were produced for the planning application.