1300 083 042
Barwon River Tidal Barrage Refurbishment
About the project
Pensar was engaged to design and construct two fishway structures to be installed at separate locations. A vertical slot fishway was installed at the Reedy Lake site and a cone type fishway at the Barwon River Tidal Barrage site. The Barwon River site works also included the refurbishment of an existing weir.
Location
Geelong, Victoria
Client & Duration
Corangamite CMA
December 2019 - July 2020
Project Scope
- Decommissioning of two existing lay flat gates which regulated the upstream river water levels at the Barwon River site
- Installation of FRP sheet piles across the Barwon River
- Concrete weir modification works
- Rock scour protection works
- Installation of precast concrete units
- Modifications to the fish attraction channels
Challenges
- Coordination and management of multiple stakeholders associated with the Barwon River
- Managing the initial geotechnical investigation to ensure the design was completed in accordance with the client’s original concept design
- The location posed challenges for material supply and heavy plant access
- The sheet pile materials for the replacement weir where imported from Luxembourg with a 10 - 12 week lead time
Achievements
- All works were completed while maintaining the existing levels and tidal flows of the surrounding environment
- The installation of the FRP sheet piles was an innovative project solution to avoid the expensive requirement of cathodic protection
- Pensar worked closely with the client, consultants and community members to achieve the successful delivery of works at both sites
