Case Study
Harnham Riverbank Restoration
Location
River Avon, Salisbury
Date
August 2018
Client
Private Client
Stakeholders
Environment Agency
Tasks
- Removal of vegetated turfs and the defective stone wall. Turfs will be re-instated upon project completion and rubble from the wall will be used as site won material.
- 6ft chestnut post and hazel faggots to be hand driven along the riverbank to create a marginal mattress.
- Setting up a 200mm high oak cladding revetment to replace the failing stone wall.
- Importing 4ot of screened topsoil to be used as backfilling material.
- Installation of a wooden decking using 50*200mm boards on top of the revetment.
- Re-grading the bank to create a softer gradient and provide easier access to the decking.
- Planting native plant species along the riverbank.
Key remarks
- Restrictive access for heavy plants.
- Opposite an EA flood defence, thus, work had to be carried out in close consultation with the EA.
Effects
- The installation of chestnut posts has encouraged sediment deposition which will provide erosion control for the river bank.
- We provided cover for macro-invertebrates by planting macrophytes along the riverbank.
- Hydro-seeded the new bank profile to give an aesthetic finish.
- Equipped the client’s garden with a platform to enjoy the riverbank safely.
