Melbourne Water is upgrading the Hawthorn Main Sewer (along the existing sewer alignment) and manholes for 1.7km on Burnley Street, Richmond to Power Street and Denham Street, Hawthorn.
The Hawthorn Main Sewer was originally constructed in 1903 and is at the end of its operational life. Relining the pipeline is now required to ensure the local community continues to receive a reliable sewerage service.
There are two separate phases associated with this Works Program. Firstly, the relining phase will occur along the existing sewer alignment from Power Street along Denham Street in Hawthorn and along Murphy Street to Burnley Street in Richmond. The project is expected to be completed by mid 2020.
Secondly, the phase to replace the twin siphon pipes under the Yarra River is in the Concept Design phase. Investigative works along the banks of the river in Yarra Bend Reserve have been completed and construction is expected to commence after the relining phase is completed.
|January 2018||Site investigations to scope project (complete)|
|June 2019||Cleaning and scanning of sewer (complete)|
|July - August 2019||Manhole preparation works and methodology determined|
|August 2019||Set up of site facilities|
|Early October 2019||Hawthorn Bypass setup|
|Late October 2019||Relining works start in Hawthorn|
|November 2019||Hawthorn Bypass removal|
|January 2020||Richmond Bypass setup|
|February 2020||Relining works start in Richmond|
|March 2020||Relining works completed in Richmond, all manhole works completed|
|April 2020||Richmond Bypass removal|
|May 2020||Relining works completed in Hawthorn, surface restoration works|
The map (below) shows the sewer maintenance holes and the full alignment that will be part of the relining project. Once the work has been completed, the maintenance holes, shared path and roads will be reinstated.
You may notice lengths of pipe on the ground during the works, including in the Hawthorn Main Drain (stormwater culvert). These are our sewer bypass pipelines which will be set up for each stage of the project to allow local sewerage services to continue operating at all times while the sewer relining is underway.
Some of these will be several hundred meters in length and will be progressively removed as each section is completed. Pumps and generators will be set up at one end of the bypass pipeline to manage the sewage flows. Access to properties will be maintained and pipes will be buried when crossing driveways and roads.
Stages of the sewer relining project
The staged approach will follow two different methodologies:
- 1. Cured in place process
Stage 1 Set up the sewer bypass pumping system
Stage 2 Cleaning of pipes, modify existing manhole and measure existing pipe
Stage 3 Lay the flat resin infused pipe liner into the existing pipe, inflate with air to expend to the existing pipe size
Stage 4 Harden the CIPP liner using UV lights that move along the inside of the pipe from manhole to manhole
Stage 5 Upgrade the manhole with new lining and ladders and reinstate the work area to existing conditions
- 2. Glass reinforced plastic method
Stage 1 Cleaning of pipes, modify existing manhole and measure existing pipe
Stage 2 Reline the sewer by inserting short sections or plastic pie down existing manholes. Each piece gets pushed along to the next manhole to form a new pipe
Stage 3 Grout is pumped into the void between old and new pipe
Stage 4 Upgrade the manhole with new lining and ladders and reinstate the work area to existing conditions
|Stage||Status and estimated timing||What's happening|
|Site investigations||Complete||Inspecting existing manholes and cleaning and scanning of sewer line|
|Manhole preparation & service location||July – August 2019||Removal of ladders and landings from within manholes; identifying existing underground and overhead services|
|Site mobilisation||August – September 2019||Equipment and machinery will be delivered to the project area|
|Hawthorn Bypass Set Up||Early October||Set up of Hawthorn sewer bypass system from Lynch Street (manhole 12) to Denham Street (manhole 7.1)|
|Power Street relining||Late October||CIPP lining between manholes 9 – 10|
|Hawthorn Bypass Pack Down||November 2019||Removal of bypass pipeline by sections|
|Denham Street relining||November – December 2019||GRP lining between manholes 6 & 7|
|January – February 2020||GRP lining between manholes 4 & 6|
|February – March 2020||GRP lining between manholes 8 & 9|
|March – May 2020||GRP lining between manholes 7 & 8|
|Richmond Bypass set Up||January – February 2020||Set up of Richmond sewer bypass system from Creswick Street (manhole 4) to Burnley Street (manhole 22)|
|Murphy Street relining||February 2020||CIPP lining between manholes 23 &1|
|February – March 2020||CIPP lining between manholes 1 & 2|
|March 2020||CIPP lining between manholes 2 & 3|
|Manhole Decommission||April 2020||Decommission manhole 5|
|Reinstatement||Early to mid 2020||Restoring any areas affected by our works to their original or similar condition|
What will I notice?
Hours of work
Standard working hours will be 7am to 6pm Monday to Friday and 7am to 1pm Saturdays (if required). Night works will be required in some sections when sewer flows are at their lowest and there is less impact to traffic along Murphys St, Richmond and Denham St, Hawthorn. Night works will be 9pm to 7am Sunday to Thursday. Some extended work hours may be required when completing critical work processes. Affected residents and businesses will be informed of this prior.
Noise will be generated from motor vehicles, machinery and generators powering the equipment, during the hours of work. We will plan to reduce noise as much as possible for all night works.
Some odour is expected when carrying out the works. We will aim to minimise this as much as practicable.
Traffic, parking, cyclists and pedestrians
There will be temporary changes to traffic conditions including lane closures, road closures, parking restrictions and driveway access limitations. These changes will be along Burnley Street, Murphy Street, Palmer Street, River Street, Creswick Street, Denham Street, Church Street, Power Street and Lynch Street.
Further information will be provided to residents and businesses prior to the relining phases of the project beginning, and also at each stage as works progress.
Minor detours may be in place for pedestrians and cyclists. Please be careful around work areas and observe new signs. We will work with residents and local businesses near the work areas to reduce any impacts associated with these temporary changes and to make sure access to private property is maintained at all times.
Respecting heritage and the environment
There is no vegetation removal expected. In some cases, we may need to undertake some trimming or alterations where trees are located in close proximity to the area of works. This may be required in Yarra Bank Reserve.
Sewerage and water services
We do not anticipate any impacts to your water or sewerage services during the works. Localised bypass pumping systems may be set up around some maintenance holes to ensure sewer services continue to operate.
Keeping you informed
We will notify local residents and businesses about these activities prior to starting works.
Doorknocks and letters will be used to inform residents, businesses and schools directly next to the work areas. We will also host a community information session closer to the construction start time. Signs will be used around our work areas to inform pedestrians, cyclists and drivers of changes to road conditions.
We will have Community Noticeboards set up close to each manhole for regular works updates.
Join our Facebook Group for works updates. Search Facebook; Hawthorn Sewer Upgrade
Come visit us at our Community Information Session: 9am – 12pm Saturday 21 September at St James Park, corner of Denham and Barton Streets, Hawthorn.
If you have any questions, please contact Melbourne Water on: