Transmission Gully

BBA Pumps step up in Transmission Gully

Overview / Gallery

The purpose behind the construction of the Transmission Gully motorway is the provide another route between wellington and the lower and central North Island. The motorway, once completed, will be a much safer, and more reliable for everyone who travels in that area and will be better suited to stand against weather events and earthquakes.

The complexity of the project makes it one of the most significant roading projects currently in the country. Not only is there extensive earthworks to be done, and the construction of 25 new bridges, but they also have to consider the native wildlife. That’s where we stepped in – see the tabs below.
The motorway is due to be completed in 2020 and we are excited that we have helped to make this project become a reality.

  • 27km motorway
  • 25 new structures to be constructed
  • $850 million project

Case Study

The Requirement The Solution The Outcome

We began working with the Transmission Gully team when the project was still in the investigative stages, back in 2015. We worked closely with the project engineers, scoping the project, and looking at the best solutions to meet the unique needs of the site.


One of the major challenges to overcome was the need for dry working areas for the installation of culverts. Pumps were going to be needed to divert the streams, while culverts were placed.

Reliability was a key concern, due to the fact that once the pump was in place to pump the stream, it had to run continuously until the culvert was in place and ready for the stream to flow through once again.


Also a concern was the environmental aspect – there could be no possibility of fuel or oils entering the waterways.

The Requirement The Solution The Outcome

The pumps ultimately selected for the project were the multi-purpose BBA 6” BA150 pumpsets from Holland – Here is why

Reliability:
Holland has been battling water for a millennia so who better to design a reliable dewatering pump. With half of Holland at or below sea level, without pumps, they would be swamped – reliability not an option…they have to work!

Environmental:
The pumps are fully bunded making them ideal for work around streams – with no possibility of oil or fuel entering the water flow inadvertently.

Versatility:
Compared to some other designs out there, the BBA are extremely compact and very mobile. Weighing only 1600kg, the pumps are easily moved around the site by excavators using the certified lifting hooks on the pump.
As the location of a pump on site may last as little as 2 days, the design of these units means that they can be easily relocated as the construction schedule dictates.

Cost Savings:
A significant cost saving also came into the equation. The gains in efficiencies of the BBA pumps over other options meant that fuel consumption was reduced to an absolute minimum.

the savings made in fuel consumption (compared to silimlar brands) alone over the course of the project would go a long way to paying off the units!

The Requirement The Solution The Outcome

The first 11 pumpsets were onsite in July 2016, followed later by a further four. Capable of pumping 475,000 litres per hour each, these pumps will put in thousands of hours before their job is finished.

On top of the larger 6” units we have on site, there is a smaller 4” model and a custom built pump for water feed to storage ponds. This is fully controlled by a remote telemetry system so the water level is consistently maintained.

BBA pumps have helped in making the construction of this motorway go smoothly. It is satisfying to contribute to one of the country’s largest construction projects and fulfilling to witness the work the pumps are doing.

Trusted by:


City Care Fonterra Bathhurst Buller City Council Connell CPB HEB Transmission NCTIR Grey District Council McConnell March Waste Management Westland Milk Products Kennards Hire