Fish Friendly Tide Gate
ATS Environmental Tide Gates are engineered for reliable performance while supporting ecological outcomes. These innovative tide and flood gates are designed to allow fish passage, tidal flushing, and effective drainage. Operating automatically with minimal maintenance, they are ideal for both new installations and retrofit upgrades across a variety of waterways.
Headwall Mounted Fish Friendly Tide Gate
Perfect for sites with a flat concrete or timber face, this fish friendly flood gate provides a stable fit and seamless integration into existing infrastructure. Adjustable hinges allow for post-install fine-tuning of aperture size and closing delay, ensuring reliable drainage while maintaining fish passage and tidal exchange.
Pipe Mounted Fish Friendly Tide Gate
Designed to slip directly over round or elliptical pipe outlets, this pipe-mounted flood gate enables fast, flexible installation where headwalls are absent or impractical. Despite its compact and modular design, it delivers the same ecological and performance benefits as larger tide gates—supporting fish migration, tidal flushing, and flood control.
Fish-Friendly Tide Gate Specifications & Features
Fully Automated Function
No manual resets required. Free-swinging double-hinge mechanism operates automatically with no floats, springs, cables, or cams to fail, ensuring reliable long-term performance.
Site-Specific Solutions
Available in both headwall-mounted and pipe-mounted configurations for new builds and retrofits. Our digital fabrication enables custom sizes and features without impacting price or lead time.
Suits New Builds and Retrofits
Direct fit to concrete or timber headwalls, or pipe-mounted for quick installation. Compatible with unusual structures and supplied with comprehensive installation guidelines.
Extends Fish Passage Periods
Adjustable hinge design extends flap-open periods to support fish migration and tidal flushing. Effective across all flow conditions for improved ecological connectivity.
Durable Stainless Steel Construction
Laser-cut from 316 stainless steel components (5mm and 10mm thickness). Low maintenance, corrosion-resistant design built for New Zealand’s coastal and freshwater environments.
Effective Flood Control
Allows tidal flow and flushing while preventing backflow during flood events. Combines drainage performance with ecological sensitivity for complete waterway management.
Minimal Head Loss
Easy-opening design provides minimal flow restriction, making it ideal for sensitive environments requiring effective drainage without compromising fish passage or tidal exchange.
Adjustable Post-Installation
Hinge offset and tilt can be easily adjusted after installation to suit local or seasonal requirements, providing flexibility for changing site conditions.
Professional Installation Support
ATS Environmental provides installation guidelines or full ATS-led installation services. Technical support available for custom mounting solutions and adjustment guidance.
ATS Fish Friendly Tide Gate provides installation support for all Tide Gates, including onsite install, custom mounting solutions, and adjustment guidance. Each gate is laser-cut from durable stainless steel and includes comprehensive installation guidelines. Post-installation adjustments can be made to suit local or seasonal conditions.
Why Choose ATS Tide Gates?
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Promotes fish passage and ecological restoration
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Durable, low-maintenance stainless steel design
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Minimal flow restriction—ideal for sensitive environments
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Fast deployment and adjustment flexibility
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Suited for a wide variety of waterways and retrofit projects
