Sagaponack, Long Island
Duneguard absorbs Hurricane Felix's wave impact before it reaches the dunes of Sagaponack on Long Island's south shore. This installation captured a tremendous amount of water-born sand causing it to be completely buried by storm's end.

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Baytree, Florida


This 600 foot length of beach in Vero Beach, Florida uses an open grid pattern to provide protection from the predominate direction of storms while still allowing access for nesting sea turtles. Duneguard meets the environmental regulations of the State and local government.


Duneguard is a dune protection system, similar in appearance to typical dune fencing, that works with the natural beach system to reduce the erosive impact
of wave run-up on the base of dunes during storms. It is particularly suitable for narrow beach situations and scarped dune facings. It is also very effective at capturing both wind-born sand and even sand that is suspended in the wash. This sand build up acts as a reservoir, giving further protection to the dune during following high water events. The dune itself is, of course, both a barrier and a sand reservoir, providing protection to landward infrastructure, making dune protection a valuable effort.

Duneguard is a very cost-effective way of preventing erosion and damage to beachfront property during storms. It is a flexible system that blends nicely with the seascape and allows for dune shifting. This approach contrasts with inflexible armoring such as bulkheading which eliminates the natural dune environment, leaves a harsh appearance and is muchmore expensive than Duneguard.

Duneguard is made of materials which are UV and salt resistant and long-lasting. Its anchor system is deep and remains stable under extreme beach conditions.

Duneguard does not require extensive permitting in most states since it is usually considered as part of the normal dune maintainance program of a township, homeowners association or individual private property owner.

Case Study Avalon



In Avalon, New Jersey a Duneguard system was put in place in June of 1995. It was placed under and adjacent to the town fishing pier in front of existing dunes. This had always been a location where the dunes were weak and subject to overtopping by water during storms and flooding in the streets. This was due to a focusing of wave energy under the pier which had scoured down the bottom into a channel for incoming waves. As a result, the dunes to each side of the pier were smaller and farther back. In the Spring of 1995, three rows of Duneguard were placed in a V under and immediately adjacent to the pier, parallel to the shore. Within six months the system had accumulated sand half burying itself and mounds extending 20 feet away from the grid. The system had completely buried itself within one year, forming new dunes in front of the old ones. In fact, Avalon's public works director decided to plant dune grass over the system to further anchor the new sand. He was quite pleased to see dunes established in a place where nothing else tried before had ever allowed dunes to take hold and grow. This area is quite stable today, despite significant storms of the last two years. Please see photographs above.

DUNEGUARD Shoreline Protection System
Plan View

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GEO-SYN Products Company
417 U.S. Highway 202
Flemington, New Jersey 08822
(800) 434-0644
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