The perfect tool to save time and preserve the environment
while keeping costs low!

Regular maintenance of waterways to limit the risk of flooding (log jams), emergency work following major weather events, hydro-morphological or hydro-ecological works, morphological crossing, landfill and restoration works: Water-Gate© flexible cofferdams are the perfect tool to help you save time and preserve the environment while keeping costs low.

The incredible efficiency of Water-Gate© flexible cofferdams

They count on us

Batardeaux souples Water-Gat© - Les références clients de MegaSecur -Europe -

Our services for river works


Feasibility analysis based on data: Profile | Flow.


Quickly recoup the purchase costs.
Rental possible for non-recurring flash floods.

Batardeaux souples Water-Gate© sur remorques


Video calls (WhatsApp, Skype, FaceTime) for remote advice during the initial installation.

Batardeaux souples Water-Gate© - Assistance à première installation

River works: case studies

Repairing structures, maintaining waterways and canals.

Water-Gate© flexible cofferdams are acclaimed by contractors and site managers for their efficacy, simplicity and versatility.
Repairing structures, underpinning, reinforcing river supports, repointing, restoring ecological continuity, removing log jams, renovating banks, draining feeder canals, etc.

Usage conditions of the Water-Gate© flexible cofferdam

Works in water – rivers – canals – ponds. Flexible cofferdams can be used in the majority of situations.
Uneven ground increases friction and thus the stability of the dam. Care is required when using the dam on muddy ground. On a concrete surface, we recommend using the WL range of flexible cofferdams with ballast rather than the WA range of cofferdams. On a sandy surface, you must bury the leading edge to limit the effects of piping erosion.

The handling required to pressurise the mobile dam depends on the strength of the current.
The stronger the current, the more people are required to coordinate the installation.

WA: a comprehensive range of flexible cofferdams up to 1.50 m high

cofferdam works river schema of principle
Features :
*       Cofferdam designed without ballast: the flexible leading edge fits perfectly over uneven surfaces
**     Only for installation in standing water
***   Deep ground sheet that facilitates pedestrian passage and safe pumping for chutes
**** Limits the risk of erosion in the event of overflow, especially on sandy beds
explanation of the WA water gate range

Slide batardeau rivière schema WA39 batardeau rivière schema WA60
WA 39
WA 60
WA 39
WA 60 batardeau rivière schema WA28
WA 28
WA 28
batardeau rivière schema WA60 WA 50 WA 50




Pumps and motor pumps

No mobile flood protection system is totally watertight. We provide pumping solutions to collect water that has seeped through and discharge it beyond the dam: self-priming motor pumps or submersible pumps coupled with generators.


Spillway and flexible pipeline

MegaSecur has developed a tailor-made spillway for lightweight discharge (DN 450). With no pump, it is environmentally friendly and features a flexible pipeline for downstream discharge. Several spillways can be positioned side-by-side if necessary.


Log-shaped ballast | Gravel

Perfectly adapted to the complementary ballasting of the Water-Gate © barriers: 15 KG / linear meter. Robust and easy to handle (three handles), they are easy to load and unload in water: polyethylene mesh.