Underwater drone to keep watch over leaky Dannevirke dam

Underwater drone to keep watch over leaky Dannevirke dam

A submersible drone is being bought by Tararua District Council to observe ongoing points with Dannevirke’s impounded water provide.

The remotely operated underwater automobile (ROV) has been recognized as an important instrument for inspecting the council’s water provide reservoirs.

The council’s Three Waters transition supervisor Peter Wimsett stated they need an “eyes-on” strategy to the inside of the dam to mitigate points confronted as a result of impounded water provide.

The price of the ROV is anticipated to be lower than $50,000, and it’s hoped it’ll cut back the prices of outdoor contractors sooner or later.


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The remotely operated automobile, or ROV, will present an underwater view with a view to monitor the dam.

It should imply the inspections could be finished utilising an underwater perspective with sonar and cameras with a small robotic arm that may launch dyes or maintain tools.

“A document of adjustments over time to the floor of the reservoirs can be utilized to determine potential issues and handle these,” he stated.

The council already operates a number of aerial drones for inspection, 3D imagery and LiDar, which give near survey-quality data.

The impounded water supply built in 2013 has had leaks repaired. Photo / Paul Taylor

The impounded water provide in-built 2013 has had leaks repaired. Photograph / Paul Taylor

A unprecedented council assembly revealed plans that would come with spending $3.2 million on a uncooked water pre-treatment plant, $400,000 on a uncooked water storage tank and $2.5m for a 6,000,000-litre handled water storage tank.


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The delayed choice to place off repairs to the impounded water provide, or dam, was as a consequence of excellent geotechnical investigations, provide challenges and points with the liner system which meant that it’s nonetheless operational, and inspections are carried out every day.

A Dannevirke public impounded water provide assembly final week allowed the general public to precise their considerations concerning the plans for the water.

Frustrations have been raised on the assembly by the general public round timelines and extra prices to ratepayers for the continued mission.

The purchases will likely be funded by means of a mortgage that will likely be paid over a minimal of 20 years or the lifetime of the property.

The dam was in-built 2013, and the preliminary leak was recognized within the 1.5mm HDPE liner in July and September of 2021.

Additional tears have been recognized in Might 2023 – one the dimensions of a cellphone and the opposite a pinhole tear – which had since been mounted, and no further leaking was discovered.

The council has dedicated to fixing the water provide and has labored to construct resilience by means of different choices, which included discovering potential bore websites and investigations into water extraction from the Tāmaki River.

Michaela Gower joined Hawke’s Bay Immediately in 2023 and relies out of the Hastings newsroom. She covers Dannevirke and Hawke’s Bay information and has a love for sharing tales about farming and rural communities.

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Written by bourbiza mohamed

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