The scope of works included:

• Installation of 80m of open cut 675mm reinforced concrete, rubber ring jointed (RCRRJ) pipe in a very physically constrained site on private property.
• An additional open cut 675mm RCRRJ road crossing beneath a narrow residential street, while maintaining one lane for traffic (priority give way).

Abergeldie also managed utilities, traffic management and stakeholder engagement.  An ITP process was used to gain sign-off from the client, which resulted in zero defects at completion.  

The works to upgrade the stormwater network in Torbay were highly complex, with a number of key innovations helping to ensure the packages of work were delivered successfully.

The works were carried out largely in residential properties and within the road corridor. Several existing utility services had to be protected and maintained in service during the works, which included the existing stormwater network which was to be replaced, a wastewater line crossing the site, the watermain and water supply network, electricity and gas.  

Whilst delivering these works, Abergeldie identified some design issues and worked with the client to come up with a suitable redesign.  The design location of one of the new catchpits in the road happened to be off course from the actual low point in the road. Abergeldie proposed a new location to the client that had been overlooked due to a nearby tree.  Abergeldie engaged an arborist consultant to assist with approval to remove the tree, enabling the client to revise the design. The tree was then removed and the Abergeldie team was then able to proceed with the revised design.

To improve the performance of the new stormwater system and avoid conflicts with surrounding services, the project team also proposed a design amendment to incorporate a new manhole with a separate connection to the catchpit. This improvement was adopted by the client.

The Torbay Stormwater Upgrades have helped to increase the capacity of the stormwater network, whilst also managing flood risks, reducing pollution and contamination in the waterways and improving overall water quality.