Great Eastern Highway Bypass Interchanges Project Lloyd ...
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LLOYD STREET BRIDGE SEPTEMBER 2021 Great Eastern Highway Bypass Interchanges Project The Great Eastern Highway Bypass Interchanges project includes the extension of Lloyd Street from its current end point adjacent to Bunnings to the Great Eastern Highway Bypass, including a new bridge over the Helena River. The Lloyd Street extension will create a new southern entry to Midland, providing improved access to St John of God Hospital, the Curtin University campus and a developing retail and entertainment precinct. The extension is expected to reduce traffic on Military Road in Midland and on the section of Clayton Street between Military Road and Lloyd Street. It is also expected to reduce traffic volumes through Guildford by 15 – 20 percent. This is because the Bypass, Lloyd Street and the Lloyd Street Bridge will offer a higher speed and more efficient route to Midland than the current route via Great Eastern Highway. The extension of Lloyd Street and the bridge over the Helena River is being delivered by Main Roads and the Greater Connect Alliance on behalf of the City of Swan as part of the Great Eastern Highway Bypass Interchanges project. Why is the Lloyd Street extension and bridge needed? • Traffic modelling undertaken in 2013 indicated significant growth in future years. • City of Swan identified a need for an alternative north-south route through the Hazelmere area into Midland. • The bridge represents a ‘missing link’ in the Lloyd Street connection, which has been constructed progressively over the past decade. • Economic analysis indicated that the bridge over the Helena River is the best option to provide this additional north-south route. • The new bridge will be an important strategic link in the future road network and is expected to take pressure off other existing north-south routes including Roe Highway, Military Road and Bushmead Road. Extension of Lloyd Street to the Bypass is expected to have significant benefits in travel time, cost and net emissions including saving up to 12 minutes for commuters currently detouring around the river. It is also expected to reduce traffic volumes through Guildford by 15 – 20 percent. Bridge Design • The bridge is proposed to be a single span steel girder bridge • The effective span of the bridge is 57 metres long. The span length helps improve waterway performance in higher (1 in 100 year) storm events by maximising the open space around the vicinity of the river channel. • The bridge batter approach will generally have a 1 in 6 slope. This batter design enhances the success of rehabilitation with a variety of tree species to replace those cleared for the project as well as establishing understorey that currently does not exist. • The Lloyd Street extension from Great Eastern Highway Bypass to Clayton Street will be a dual carriageway with a 60km/h speed limit. • The bridge will have a shared path on one side and a foot path on the other. The shared path will tie in with the new Principal Shared Path being constructed along the Great Eastern Highway Bypass. The foot path will tie in with the local footpath network. • Opportunities to provide better access to the banks of the river and include cultural markers as part of the bridge design will be explored. What is the impact of the bridge construction on the environment? As with all major infrastructure, there will be some environmental impacts that will be closely managed and monitored during construction. Care will be taken to protect and minimise impacts of construction on the environment. The project team will undertake detailed environmental risk assessments for all aspects of the project including consideration of issues associated with culture and heritage, dust, flora and fauna, waterways, hazardous substances, noise and vibration, and spoil management. After the hazards, impacts and risks are identified, control measures will be implemented to mitigate or eliminate risks. Lloyd Street Bridge The Lloyd Street extension and bridge is co-funded by the State and Federal Governments and the City of Swan. In 2019, the City’s Build Bridges Not Traffic campaign received strong support from thousands of local residents in Midland and surrounding areas.
Transcript of Great Eastern Highway Bypass Interchanges Project Lloyd ...
LLOYD STREET BRIDGE SEPTEMBER 2021
Great Eastern Highway Bypass Interchanges Project
The Great Eastern Highway Bypass Interchanges project includes the extension of Lloyd Street from its current end point adjacent to Bunnings to the Great Eastern Highway Bypass, including a new bridge over the Helena River.
The Lloyd Street extension will create a new southern entry to Midland, providing improved access to St John of God Hospital, the Curtin University campus and a developing retail and entertainment precinct.
The extension is expected to reduce traffic on Military Road in Midland and on the section of Clayton Street between Military Road and Lloyd Street. It is also expected to reduce traffic volumes through Guildford by 15 – 20 percent. This is because the Bypass, Lloyd Street and the Lloyd Street Bridge will offer a higher speed and more efficient route to Midland than the current route via Great Eastern Highway.
The extension of Lloyd Street and the bridge over the Helena River is being delivered by Main Roads and the Greater Connect Alliance on behalf of the City of Swan as part of the Great Eastern Highway Bypass Interchanges project.
Why is the Lloyd Street extension and bridge needed? • Traffic modelling undertaken in 2013
indicated significant growth in future years.
• City of Swan identified a need for an alternative north-south route through the Hazelmere area into Midland.
• The bridge represents a ‘missing link’ in the Lloyd Street connection, which has been constructed progressively over the past decade.
• Economic analysis indicated that the bridge over the Helena River is the best option to provide this additional north-south route.
• The new bridge will be an important strategic link in the future road network and is expected to take pressure off other existing north-south routes including Roe Highway, Military Road and Bushmead Road.
Extension of Lloyd Street to the Bypass is expected to have significant benefits in travel time, cost and net emissions including saving up to 12 minutes for commuters currently detouring around the river. It is also expected to reduce traffic volumes through Guildford by 15 – 20 percent.
Bridge Design • The bridge is proposed to be a single
span steel girder bridge • The effective span of the bridge is 57
metres long. The span length helps improve waterway performance in higher (1 in 100 year) storm events by maximising the open space around the vicinity of the river channel.
• The bridge batter approach will generally have a 1 in 6 slope. This batter design enhances the success of rehabilitation with a variety of tree species to replace those cleared for the project as well as establishing understorey that currently does not exist.
• The Lloyd Street extension from Great Eastern Highway Bypass to Clayton Street will be a dual carriageway with a 60km/h speed limit.
• The bridge will have a shared path on one side and a foot path on the other. The shared path will tie in with the new Principal Shared Path being constructed along the Great Eastern Highway Bypass. The foot path will tie in with the local footpath network.
• Opportunities to provide better access to the banks of the river and include cultural markers as part of the bridge design will be explored.
What is the impact of the bridge construction on the environment?As with all major infrastructure, there will be some environmental impacts that will be closely managed and monitored during construction. Care will be taken to protect and minimise impacts of construction on the environment. The project team will undertake detailed environmental risk assessments for all aspects of the project including consideration of issues associated with culture and heritage, dust, flora and fauna, waterways, hazardous substances, noise and vibration, and spoil management. After the hazards, impacts and risks are identified, control measures will be implemented to mitigate or eliminate risks.
Lloyd Street Bridge The Lloyd Street extension and bridge is co-funded by the State and Federal Governments and the City of Swan. In 2019, the City’s Build Bridges Not Traffic campaign received strong support from thousands of local residents in Midland and surrounding areas.
Bridge over the Helena River
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Lloyd
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Shared path for pedestrians & cyclists
Retention of existing vegetation where possible
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Revegetation of bridge batter slopes
Bunnings
Stirling Crescent
Lloyd Street Bridge Explained
Heritage considerationsThe area where the Lloyd Street bridge is being constructed is a site of cultural significance. Consultation with representatives of the Whadjuk Native Title Claim group will be ongoing throughout development, design and construction to ensure areas that are significant to the Whadjuk people are protected during bridge construction activities.
Throughout clearing works Whadjuk Noongar representatives will be present on site to monitor the works to observe ground disturbing activities within any areas of interest. The Greater Connect Alliance is also working with the representatives of the Whadjuk Native Title Claim group to develop a Heritage Management Plan which includes survey methodologies, on-site inspections and assessments, and recommendations for management and preservation of cultural heritage.
How will the Helena River be protected during construction?The Helena River and any other waterways in the project area will be protected via use of appropriate sedimentation controls such as silt fencing. Water quality will be monitored throughout construction to ensure water quality is maintained. Checks for frogs and other aquatic life will also be undertaken prior to construction commencing.
Vegetation replacementConstruction of the Lloyd Street bridge requires removal of approximately 100 Eucalyptus rudis and other tree species. To compensate for this loss, portions of the Helena River floodplain will be rehabilitated with a mix of native trees, shrubs and sedges that occur within the area. Opportunities will be explored to retain as many existing trees as possible on the bridge approaches.
We are looking to plant in the order of around 30,000 trees/plants within a 4ha area!
The embankments leading up to either bridge abutment will be revegetated with a mix of Eucalyptus rudis (Flooded Gums) and other species.
When will construction of the Lloyd Street bridge begin?Subject to regulatory approvals, construction of the Lloyd Street bridge is expected to begin in early 2023 with completion scheduled for late 2023.
