Barrington Bridge opening
The Barrington Bridge was opened to traffic by the Hon Gerry Brownlee on 25 August 2012.
The new Barrington St Bridge is significant because it is the first of the mainline 'motorway' bridges to be opened to traffic. It is also the first milestone in the new construction season that will see, over the next 4 months, various stages of the new motorway opened to road users. We are opening the interchange at the Barrington Street over bridge early so road users can enjoy some of the motorway’s benefits sooner.
Work started on the Barrington St Interchange with clearing and stone column trials in February 2010. There was also extensive noise and vibration monitoring undertaken in these methodology trials to minimise the impact on surrounding property.
We installed approximately 450 stone columns under the Barrington St bridge abutments to lessen the risk of potential liquifaction in the event of an earthquake. These ranged in depth from 8 to 12m and in total length add up to about 5 kilometres of columns.
The works in this area have included significant safety improvements to the Collins / Simeon / Brougham St intersection and will help reduce crashes at the existing Jerrold St / Barrington St intersections. The overall form of the bridge along with landscaping and urban design elements of the work are designed to be sympathetic to the urban environment surrounding it.
This project will relieve current traffic congestion points on the state highway network. It also represents a significant environmental improvement for the surrounding community as traffic is moved to the new carriageway and away from parks, housing and walking / cycling facilities.
When completed, Stage 1 of the Christchurch Southern Motorway will provide a safer, more efficient and reliable route between the Central City, Lyttelton Port and southwest Christchurch.