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Rangitāiki River floodwalls

Three concrete floodwalls on the Rangitāiki River are being replaced to ensure they continue to help protect the community from flooding in the coming decades.

Why are we doing this? 

This project was prompted by the discovery of seepage (the slow escape of water through spongy earth) at three floodwall sites along the Rangitāiki River (Greig Road, Thornton School and College Road) and is part of Regional Council’s ongoing work to upgrade flood defences around the rohe.

Flood protection is the first line of defence when it comes to reducing the impact of significant flooding, which is why we now have nearly $400M of flood protection defences across the rohe, such as floodwalls and stopbanks.

Find out more about our flood protection efforts.

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This project involves removing existing floodwalls along the Rangitāiki River and building new, upgraded flood defences.

The new defences are built by inserting sheet piles (big sections of sheet steel with interlocking edges) into the ground and covering them with an earth stopbank or concrete floodwall. This design will provide more effective seepage control below ground.

Once complete, these new flood defences will form part of a network of protection along the Rangitāiki River. This includes the Rangitāiki Floodway and Spillway and future stopbank work along the lower catchment.

In a flood event, these defences will work together to help protect communities along the awa, by managing the increased water levels and alleviating pressure off the stopbanks.

Crown Infrastructure Funding

Bay of Plenty Regional Council received funding from Central Government’s Crown Infrastructure Funding for this project. This funding was granted as part of the Covid-19 Response and Recovery Fund. The funding covers 75% of the initial project cost and was one of six projects Bay of Plenty Regional Council received funding for. 

Stage one: Grieg Road – Complete

The upgrade at Greig Road was completed in April 2021. The new earth stopbank has a sheet pile centre, which is designed to control seepage.

floodwall

Stage two: Thornton School – Complete

These works were completed in December 2021. Like the Grieg Road site, the new earth stopbank has a sheet pile centre, which is designed to control seepage.

Stage three: College Road – Construction begins Nov/Dec 2022

This is the final stage of the Rangitāiki Floodwalls project and is expected to be finished by April / May 2023. 

The construction process will involve the installation of a steel sheetpile wall into the stopbank. Once the sheetpile is installed, it will be encased in concrete and a pool-style fence will be installed on top of the wall, to enhance the look and provide security for neighbouring residents. 

Hear Project Lead Mark Werpachowski discuss what’s happening with the floodwalls:

The existing floodwall will be removed and replaced in stages with the new wall, to provide the current level of flood protection during the construction process.

Do you live in Edgecumbe? Here’s what you need to know:

The construction area is from 87 – 109 College Road, along the Rangitāiki River walkway.

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During the construction period, the Rangitāiki River walkway will be closed. Signage will be positioned at the walkway entrances opposite Edgecumbe College, next to 87 College Road and the end of Tanekaha St to let users know. We’ll keep in touch with the community about progress and the walkway’s reopening.

Edgecumbe residents may also hear some noise during construction. Construction will be restricted to regular working hours (approx. 7am to 5pm weekdays only) and ongoing monitoring will be done to assess the impacts.

We will work closely with the appointed contractor to ensure all resource consent conditions are met and impacts on the community are managed appropriately.

If you have any questions or concerns during the construction period, please direct them to engineering@boprc.govt.nz  

Project updates

3 MONTHS AGO College Road floodwall is finished

Construction on the concrete floodwall along the College Road section of the Rangitāiki River is complete.

Finish line is in sight for floodwalls
11 MONTHS AGO Finish line is in sight for floodwalls

Despite a very wet autumn causing a few delays, the construction of the floodwalls near College Road is progressing well.

Construction on College Road floodwall
A YEAR AGO Construction on College Road floodwall begins

Works are underway to upgrade the floodwall along College Road in Edgecumbe township.

This section of floodwall is the final stage of Bay of Plenty Regional Council Toi Moana’s work to upgrade floodwalls downstream of the Edgecumbe College breach site, as part of the Rangitāiki River Floodwalls project.

Floodwalls along College Road, Edgecumbe in Nov/Dec 2022
A YEAR AGO Works to upgrade the floodwalls due to begin in Nov/Dec 2022

Works to upgrade the floodwalls along College Road, Edgecumbe, are due to begin in November/December 2022.

This is the final stage of the Rangitāiki River Floodwalls project, to upgrade the flood defences at key locations along the river, which will help protect the community from a flood in the coming decades.

2 YEARS AGO Progress on the College Road floodwall

The final stage of the Rangitāiki River floodwalls project along College Road is underway, with the 10 affected landowners supporting proposed designs and completion of the work.

The College Road section is the third and final stage to replace and upgrade the floodwalls along the Rangitāiki River, following the 2017 Edgecumbe flooding event.

2 YEARS AGO End of year floodwall project wrap

We’re two thirds of the way through the floodwall replacements with the Greig Road and East Bank Road walls now complete.

Watch this video to see all the progress we’ve made this year:

Thornton School Floodwall upgrade begins
2 YEARS AGO Thornton School Floodwall upgrade begins

Work has started on replacing the floodwall on the Rangitāiki River near Thornton School.

The new flood defences are a combination of sheet piles (big sections of sheet steel that have interlocking edges that are driven into the ground) that are then covered by an earth stopbank.

Upgrade of the Greig Road stopbank completed
2 YEARS AGO Upgrade of the Greig Road stopbank completed

The upgrade of the Greig Road stopbank on the Rangitāiki River has been completed.

3 YEARS AGO Update: 16 October 2020

The commencement of flood protection projects on the lower Rangitāiki has signalled the start of the 2020 construction season for the Bay of Plenty Regional Council engineering team.