Waterways & Coastal

Our waterways are critical environmental and community assets. They support diverse ecosystems of ecological significance and offer high aesthetic value to the communities they flow through. Just as importantly, they perform the vital function of safely capturing and conveying rainfall away from populated areas and out to the coast.

We provide the critical knowledge and expertise to maintain these waterways to efficiently convey floodwaters in a manner that supports and enhances instream and coastal ecological values.

Our services include

We provide critical expertise to maintain waterways for efficient water conveyance and protection, while supporting and enhancing instream and coastal ecological values.
River Protection Erosion & Sediment Control Coastal Works Gravel Extraction Flood Mitigation  Flood Response & Flood Recovery
A teal excavator clearing and moving large piles of uprooted trees and debris on a sunny day, with hills and bush in the background.

River Protection

Our team develops programming and automation solutions for a wide range of control systems, covering pump stations, treatment plants, control gates, and reticulation networks.
Get in touch
Marc Jary
+64 277 388 6077
mjary@www.kumanu.co.nz
Projects

Erosion & Sediment Control

Our waterways work is complimented by expertise in water clarity 
monitoring, over-pumping, and sediment management to ensure that
all work is completed with ecosystem health as a core priority for
every project. 
Get in touch
Marc Jary
+64 277 388 6077
mjary@www.kumanu.co.nz
Projects

Coastal Works

We are skilled at managing works at the interface between land and sea. From rock armouring to sand management and dune planting, our integrated approach provides enduring and positive ecological outcomes.  
Get in touch
Marc Jary
+64 277 388 6077
mjary@www.kumanu.co.nz
Projects

Gravel Extraction

Kūmānu offers ecology-led river management services, performing gravel extraction primarily for flood risk mitigation and maintaining natural river systems. Our expertise balances gravel removal with resource consent requirements with river health as our central driver.  
Get in touch
Marc Jary
+64 277 388 6077
mjary@www.kumanu.co.nz
Projects

Flood Mitigation 

We provide our clients with ecology-led stormwater management and flood resilience infrastructure. Our services include building and renewing stormwater systems, such as flood walls, stopbanks, and detention dams, while optimising natural waterways. We integrate environmental solutions to safely move floodwaters, mitigating damage and protecting communities. 
Get in touch
Marc Jary
+64 277 388 6077
mjary@www.kumanu.co.nz
Projects

Flood Response & Flood Recovery

Our team is also on standby to respond during flood events and civil defence emergencies. Flooding cannot always be prevented, and when the worst occurs, our teams are deployed with expert knowledge to keep floodwaters flowing, with protection of life and property as a guiding principle. After the worst has passed, our teams are skilled at helping with the recovery phase after significant flood events. Our approach combines our arborists, civil works, ecologists, and horticulturalists to deliver end-to-end support and recovery services.
Get in touch
 Marc Jary
+64 277 388 6077
mjary@www.kumanu.co.nz
Projects
A construction worker and a yellow excavator working beside a planted stream bank, with newly planted native shrubs protected in sleeves and a pump unit with hoses running across the site.A yellow excavator operating beside a vegetated stream bank, surrounded by native plants in protective sleeves and hoses running across the ground.

Projects

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