Managing Groundwater Near Sensitive Waterways

When it comes to laying pipes below the water table at a beachside location, fluctuating groundwater levels can pose significant challenges. Recently, we had the opportunity to assist a customer in overcoming just such a situation – ensuring their project stayed on track despite the tricky conditions.


Prime settling tank used for water treatment at a New Brighton construction site

The Challenge

Prime needed to manage groundwater on a beachside site directly influenced by tidal flows. We had to keep trenches dry for safe working conditions and help the project stay on schedule. Reliable groundwater control was critical to maintaining progress and supporting timely delivery.

The Solution

We deployed a BBA PT150 wellpointing pump with wellpoint spears, header pipes and a settling tank to manage groundwater across the site. The setup kept the trenches dry while removing silt and other contaminants before discharge.

Using the PT150 also helped reduce fuel use, operating costs and CO₂ emissions compared with less efficient dewatering options.

The Outcome

The setup kept water out of the trenches, helping the site team work safely and keep the job moving.

As the team leader reported:

“It worked amazingly – there was no water in the trenches, and it allowed us to do our job quickly and easily.”

The customer also highlighted the value of Prime’s support:

“Richard is very easy to deal with and has loads of knowledge – he and Prime are both fast and effective.”

Planning a dewatering or water treatment setup?

Talk to our team about your site conditions, groundwater and treatment requirements. We can help determine the right setup for your project.