Bridge Street - South New Brighton - Bridge repairs and Bridge Street wastewater renewal
Where we are working
What we are doing: Bridge Street wastewater renewal
The gravity wastewater renewal, along Bridge Street, from the Estuary Road and Bridge Street roundabout to Cromer Place, is scheduled to begin 27 August 2012. This is the second stage of the wastewater renewal along Bridge Street; the western end (towards the bridge) is complete. The crew will begin working at the Estuary Road and Bridge Street roundabout and work west along Bridge Street towards Cromer Place.
The gravity wastewater pipe takes wastewater from households through to the pump station. To complete the gravity wastewater renewal we need to dig trenches ranging from 1.5-3.5 metres deep. Dewatering, using spears and extraction pumping, will be required to drop the water table in the trenches at all times. Excavation will proceed and a new PVC (polyvinyl chloride) pipe will be installed, then the laterals will be renewed and attached at the private property boundary.
The impact of the earthquakes on Bridge Street Bridge
The earthquakes caused considerable liquefaction and lateral spreading of the land that surrounds the bridge. The land movements placed a huge amount of pressure onto the bridge abutments, the structures located at the ends of a bridge where the bank and the bridge meet. Under the pressure, both abutments rotated causing the bridge abutments to skew. The land also settled at the approaches to the bridge, especially on the east end. This settlement caused the road leading onto the bridge to crack significantly.
What we are doing: The Bridge Street Bridge repairs
The Bridge Street bridge sustained a great deal of damage in the February 2011 earthquake and subsequent aftershocks. The repair to the bridge is a substantial piece of engineering work and will take approximately 10-12 months to complete.
- The bridge abutments on both ends need to be rebuilt.
- There will be new abutment piles drilled at each end of the bridge which will be approximately 40 metres below the existing deck level of the bridge.
- Ground improvements will be undertaken around the abutment piles to reduce the impact of any future liquefaction.
- The centre two piers of the bridge still need to be inspected using dive teams. At this stage, it is likely that they will remain and be strengthened.
- Additional ‘bridge land spans’ will be constructed at both abutments in order to reduce the pressure to prevent any future rotation.
- The existing deck of the bridge will be levelled and surface repaired.
- The existing services the run under the bridge deck will be repaired or upgraded.
- The roadway from the Dyers Road (Highway 74) roundabout and the first house on Bridge Street will be realigned and re-levelled.
Stage one: From approximately 27 August for two weeks
For the wastewater renewal work along Bridge Street we will begin working at the Estuary Road and Bridge Street roundabout. Because work is needed under a section of the roundabout there will be significant traffic management required for approximately two weeks.
- One traffic lane along Bridge Street and over the bridge, between Dyers Road (Highway 74) and the Bridge Street and Estuary Road roundabout will be closed. This section of Bridge Street, and the bridge, will be open for traffic exiting South New Brighton or Southshore only. Traffic into South Brighton will need to take the Pages Road bridge, please see the next page for the recommended detour.
- For the work near the Bridge Street and Estuary Road roundabout we will close off the northbound traffic lane on Estuary Road from Cradock Street to Bridge Street, with a detour via Beatty Street, Pine Avenue and Bellamy Avenue for north bound traffic. This will be in place for approximately two weeks.
- For the work on the Bridge Street and Estuary Road roundabout from the eastern end of Bridge Street traffic will only be able to turn left only onto Estuary Road at the roundabout. Traffic coming from the eastern end of Bridge Street will not be able to go straight ahead or turn right at the roundabout. This will be in place for approximately two weeks.
- There will be no on-street parking available immediately adjacent to the worksite, signage will indicate where parking will not be permitted. Please park on Estuary Road for access to the shops. The Southshore Service Station on Bridge Street will still be accessible to westbound traffic (out of Southshore and South New Brighton) from Bridge Street.
- A safe walkway will be provided for pedestrians along Bridge Street.
- Vehicular access to properties on Bridge Street will be maintained where it is safe and practical. Due to the nature of the works vehicle access to properties between the intersection of Bridge Street and Cromer Place may be limited for short periods of time. Residents will be notified in advance.
- Please take care when leaving your driveway and ensure you are travelling in the correct direction.
- Please contact Fulton Hogan on 0800 277 34 34 if you have any specific access requirements that we need to consider e.g. nurse/doctor visits, Meals on Wheels or planned works on your property.
For work over the Bridge Street and Estuary Road roundabout: for approximately two weeks
Traffic Impact: Detour for traffic coming into South New Brighton and Southshore
- One traffic lane along Bridge Street and over the bridge, between Dyers Road (Highway 74) and the Bridge Street and Estuary Road roundabout will be closed. This section of Bridge Street, and the bridge, will be open for traffic exiting South New Brighton or Southshore only. Traffic into South Brighton will need to take the Pages Road bridge, the recommended detour route is via Seaview Road, Hardy Street, Owles Terrace, Union Street and onto Estuary Road. Please allow extra time when travelling into South New Brighton and Southshore because of this detour.
- You may also want to consider using one of the other bridges, north of Pages Road, to cross the Avon River or taking Marine Parade instead of Union Street.
- Bridge Street Bridge will remain open to two-way cyclist and pedestrian traffic.
If emergency services need access through the work site, at any stage of the Bridge Street Bridge work, the site will be made safe and immediately opened to allow them to get through. In a Civil Defence emergency the works down Bridge Street and on the bridge would allow traffic to flow out of Southshore and South New Brighton. Works would immediately cease and a safe evacuation, under the coordination of the local Police and Civil Defence, would be implemented.