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The annual dredging programme on the Mangawhai Harbour has wrapped up for another year.
The completion of the season marks another milestone in the Mangawhai Harbour Restoration Society’s (MHRS) mission to enhance the harbour’s recreational use while protecting its fragile environment.
This year’s operation focused on a nearly 5000 square metre area, with about 4245 cubic metres of sand removed. The work deepened the targeted section of the harbour by an average of one metre, making the waters safer and more accessible for swimmers, kayakers, paddleboarders and boaties.
In line with the society’s environmental commitment, all dredged sand was carefully pumped back onto the Mangawhai Sandspit – the natural barrier that shields the inner harbour from ocean swells, erosion and rising sea levels.
The project was carried out under MHRS’s resource consent from Northland Regional Council, which requires detailed bathymetric surveys before and after dredging. These surveys ensure the work is both effective and sustainable, restoring natural water flow, reducing sediment build-up and helping to extend the time between future dredging cycles.
Beyond improving navigability, the dredging also supports the harbour’s ecological health. By strengthening the Sandspit, the project safeguards nesting habitats for birdlife and helps preserve the natural character of the estuarine environment.
“This work directly benefits the Mangawhai community,” MHRS chair Peter Wethey said. “We’re not just creating safer and more accessible waterways for recreational use, but also actively preserving the sandspit and surrounding ecosystem.”
Local feedback has consistently reinforced the value of the programme, with residents and visitors pointing to its importance for tourism and lifestyle in the area. The improved depth and water flow are also expected to reduce sediment build-up in the months ahead, prolonging the benefits.
Funded through community contributions and supported by environmental agencies, MHRS plans to continue its dredging programme annually as needed, always with sustainability and habitat preservation at its core.
With summer approaching, residents and visitors are being encouraged to enjoy the revitalised harbour while supporting the ongoing efforts to keep Mangawhai’s natural treasures thriving for generations to come.
Enquiries: mhrsoc@gmail.com
