Stream damming | Cofferdam | WA-SERIES

Contain pollution spills | Create a dam | Water supply


This stream barrier combines simplicity, robustness and reliability. It is used to block or dam streams, small rivers or ditches for spill response, water supply or as a temporary cofferdam to work in streams. It combines robustness and solidity and is designed for rapid and easy installation and deployment. The main clientele for this type of barrier: firefighters, petroleum companies, contractors, municipal workers, wildlife ecologist and mining exploration companies.

Firefighters can rapidly dam a small brook or stream to create a water supply to draw water from. In rural environments where dry hydrants are not available, the Water-Gate is a convenient alternative as well as for wildland firefighting to draft from available sources. The portable dams are lightweight and easy to carry and install in remote locations. They do not need additional material for installation, no gas or electricity, no filling and no anchors required. The Water-Gate is versatile and can also be used to contain a spill or contaminated firewater in a ditch or stream. All Water-Gate models conveniently and rapidly attach together with a Velcro system giving first responders the latitude to adapt to locations of all types.

For work in streams, the Water-Gate is used as a temporary cofferdam for culvert changes, bank restorations, bridge repairs, canal dredging or other applications requiring dewatering. The ease of deployment and rapidity of installation makes it an ideal choice for municipalities, construction companies, wildlife ecologist and other sectors operating in aquatic environments.  A weir and tunnel kit is available to channel or divert excess water downstream across the dewatered zone.

Note: It is recommended, for installation on concrete, to use the WL Serie.

Types of Applications


Main Characteristics


Main characteristics of the WA Series:

A – Ultra-strong PVC coated Polyester fabric for stream installation.

B – Compact partitions leaving the bib free for pumping water and making a safe access to cross the stream.

C – Metallic rings or polypropylene handles to facilitate some water installation.

D – Anti-mining bib to avoid stream bed erosion if overtop occurs.

E – Heavy duty polypropylene handles to facilitate handling.


1 dans 4


The barrier has 4 times more floor surface than the water being retrained, thus 4 times more vertical thrust (or on the ground) than the horizontal thrust allowing proper adhesion. For the water to hold back the water on most surfaces such as asphalt and grass, a 2½ to 1 ratio is usually sufficient for a safe installation therefore, the Water-Gate’s 4 to 1 ratio is much safer and the risk of slipping is unlikely. The wider the barrier, the harder it is to make it slip, we can then conclude that the Water-Gate is 33% safer than required.

  1. It will unfold and fill as the water infiltrates inside the barrier.
  2. The water pressure will completely open the barrier.
  3. The sewn in floater will allow the top part of the barrier to float and will follow the motion of the incoming waves.
  4. The accumulated water pressure stabilizes the barrier in place no matter the terrain.

No need to pump water inside.

Available Models

WA Anglais

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