Phase 2 of the pond works has now been completed, and the following diagrams illustrate the works that have been carried out. This includes the boardwalk, islands, bridge to duck island, cladding along the Plump Duck and Playground areas and the re-establishment of the banks.
Work has now been completed on the heath lake in terms of the movement of silt within the pond basin, and the pictures above illustrate the changes from how the lake was before work commenced, and how the lake is looking in terms of depths now that the work has been completed.
Pond Stabilisation Phase 2 – from 3rd August for 5 weeks from 3rd August, the Five Rivers contractor will be returning to continue the work on the Pond Bank Stabilisation. The work will take approximately 5 weeks to complete, and will consist of the following elements:
- Implement solutions to the Nicospan material so that strands of thread are not able to come away and affect the wildlife.
- Carry final snagging works on the board walk.
- Introduce coir and coir matting along Sussex Road area to introduce water level plants and provide additional support to the banks.
- Re-plant areas where plants have not survived with alternative species or different plants, and implement a watering schedule depending on weather conditions.
- Hydro seed new recovered areas of bank with low level plants.
- Hydro seed new Islands with low level plants.
- Introduce fascia boards along the north face of the pond.
- Level any sand humps that have been created by the dredging, in particular those near to the edge.
- Introduce FlexMSE bags mainly on the east side of the heath where there are current hard edges to introduce further planting.
This project aims to increase biodiversity in and around the pond and restore areas where the banks have been eroded.
A pond in good health is an incredibly rich and varied habitat for wildlife. When the environmental conditions are right, an array of different plant species grow in abundance, creating a spectrum of aquatic zones in which a myriad of different creatures manage to find the right kinds of spaces to flourish. Unfortunately, the Heath Pond is poor in biodiversity and a mono-culture is developing.
The work of this project includes:
- Renewal and restoration of eroded banks
- Planting of over 1,000 suitable native bank-side plants
- Three peninsula fishing swims
- Coppicing of bank-side willow trees and other trees which excessively shade the pond
- Creation of new two islands, using dredged material and planted with native marginal species
- Pond bed reprofiled in certain areas to create a mosaic of marginal habitat
- Planting in three locations of Phragmites australis to create additional reed-beds
- Replacement boardwalk which is wider, with handrails and passing place
The requirements for the work was first identified in the early 2000s, however planning did not begin in earnest until 2015. Once areas or work had been identified with key stakeholders high level proposals were prepared.
A Public Consultation was held, including boards displayed around the Heath. A range of views and an overall positive feedback was received in response to these proposals.
In 2019 Petersfield Town Council held a tendering exercise and received 8 bids to design and deliver the project. Four bids were shortlisted an each made a presentation to members of the Grounds Committee and Officers of Council.
On the 19th September 2019 Petersfield Town Council awarded the contract for the project to Five Rivers Environmental Contracting Ltd.
It is hoped that the work will commence in the Autumn of this year, with planting work happing during late Spring 2020.
Work is due to commence on site in late January 2020 and expected to take 12 weeks to complete. During this time some areas on the edge of the pond will be closed to public access. It is not anticipated the actual path around the pond will be closed except for short periods when machinery is being moved around.
17/10/2019 – Topographic Survey Completed
Topography is the study of the shape and features of land surfaces
22/10/2019 – Bathymetric Survey Commences
Bathymetry is the study of underwater depth of lake or ocean floors. In other words, bathymetry is the underwater equivalent to hypsometry or topography.
29/11/2019 – Amphibious Excavation
An amphibious excavator is a type of excavator that can perform dredging while afloat in shallow water. This work has allowed the team to understand more about the make up of the silt at the bottom of the pond.
12/12/2019 – Fish Survey
A 2 day survey took place. This involved using a combination of seine netting and electric fishing.
The seine netting of 100 x 4 metre was deployed from a boat and used for sampling in the deeper areas of the pond. Electric fishing was used in the shallower areas and around the island. The data collected allows for an understanding of species assemblage and stocking density.