HSI Services, Inc. has 20+ years of experience in water management

Incredible Improvements in Cofferdam Design

Incredible Improvements in Cofferdam Design

Incredible Improvements in Cofferdam Design

Cofferdams have been in use since before the time of Christ to divert water for various reasons. In recent times, they’re mainly used for construction sites beneath the surface of the water. They are watertight temporary structures built to enclose a worksite and keep it dry while repairs and construction are being completed. They create a safe, protected environment in which workers can complete their tasks with ease.

Traditional Cofferdam Design

Traditional cofferdams can be constructed using sheet metal, concrete, wood, or a double-walled with filler approach. They can be cellular, braced, rockfill, cantilever sheet pile, or earth embankment cofferdams. They are temporary structures built to withstand great amounts of pressure to keep water out while construction is completed. Once the job is complete, the traditional cofferdam is typically dismantled. Often, the displaced water is stored in a temporary holding tank and pumped back into the site upon project completion.

Traditional cofferdams often require heavy equipment and labor to install and dismantle. Because they require significant man hours and heavy machines, they also generate a fair share of injuries involving worker’s comp. However, they can be used in any number of scenarios to effectively keep worksites dry during construction and repairs. They have been the go-to method for dewatering construction worksites for over a hundred years.

Cofferdam Innovations: The Inflatable Bladder Dam

Innovations and technology often improve tried and true systems and methods. New innovations, however, are not always embraced quickly. Consider the following 5 reasons to make the inflatable bladder dam your go-to solutions for dewatering your worksites:

  1. Installation is 3 to 5 times faster than traditional cofferdam solutions.
  2. Requires minimal equipment and labor.
  3. Reduces workers’ comp claims by reducing man hours.
  4. Saves money in labor, time, and by being reusable.
  5. Minimizes environmental impact.

Gain and Edge on Your Competition

Save time and money on all your jobs requiring dewatering. Gain an edge on your competition by adopting this innovative approach to dewatering before they do. Don’t stick with an antiquated cofferdam design when newer, better options are available. Make the inflatable bladder dam your dewatering method of choice for all your underwater projects this year.

For more information on inflatable bladder dams and other dewatering resources, Contact Us.

5 Key Benefits of a Water Filled Cofferdam

5 Key Benefits of a Water Filled Cofferdam

Whether you are laying pipes in a river or lake bed, performing maintenance on an underwater structure, or building a bridge, dewatering the worksite is a must. Cofferdams are widely used for this purpose and come in many shapes and forms. Water filled cofferdams have become a popular choice in many industries due to the many benefits associated with this type of solution.

Why Choose a Water Filled Cofferdam?

If you have never used a water filled cofferdam before for your projects, you may be wondering how it is different and how it compares to using sandbags or other types of cofferdams.

Here are 5 Key Benefits of using a Water Filled Cofferdam for your Next Project:

ONE: Water filled cofferdams are easy to fill and quick to install.

This type of cofferdam solution goes up very quickly and easily because the water does all the work.

TWO: Fill material is available in abundance on site

Water is readily available on site so you never have to worry about carrying enough fill material with you to set it up.

THREE: Molds perfectly to physical environment

Water is pliable and flexible. When you fill the cofferdam, it forms to the river bed, lake bed, or other environment with no resistance.

FOUR: Forms airtight seal to prevent water escape

With sandbags and other materials, you run the risk of water escaping through the cracks. With a water-filled cofferdam, this risk is eliminated due to the nature of the seal that is formed when it is installed.

FIVE: Eco-friendly, no environmental footprint

Water filled cofferdams are reusable and have no environmental impact. Not only does this reduce product waste, but also saves money as they do not have to be replaced often.

At Hydrological Solutions, we are experts on water filled cofferdams. Our Aqua-Barriers® are built to help provide our customers the peace of mind they deserve when working in sensitive conditions. For more information about Aqua-Barriers® Cofferdam, please visit our FAQ. If you’re interested in our effective inflatable cofferdam solution, give us a call at 936-372-1222 or toll free at 800-245-0199. We look forward to hearing from you.


Evolution of Cofferdams: A Dewatering Timeline


Evolution of Cofferdams

Evolution of Cofferdams

Cofferdams have a rich and interesting history. They have been used for water control dating back to 539 BC and have evolved and improved over time.

Earthen Cofferdam


In 539 BC, King Cyrus of Persia used earthen cofferdams to temporarily divert the Euphrates river, allowing the capture of the city of Babylon. Babylon’s dominance ended and the rule of the Medo-Persian empire began.

Roman Cofferdam

Roman CofferdamTemporary Wood Pilings

The Romans used temporary wood pilings as cofferdams to build Trajan’s Bridge across the Danube river in 102 AD in modern-day Romania.

Sandbags for Water Control


Sandbags were first used during the Napoleonic Wars in the 1800’s. They were first used for protection during battle and later used as temporary dams for water control.

Read about the drawbacks of using sandbags for your dewatering project.

Steel Sheet Pile Cofferdam

Steel Sheet Pile

In the early 1900’s a milestone in cofferdams was introduced in the form of steel sheet pile by an engineer in Germany. Larssen’s “U” shaped piling with its interlock design is still used today.

Aqua Barrier Water Inflated Cofferdam


Aqua-Barriers were introduced into the marketplace in 1996 featuring a patented internal baffle system which provides stability.

Read about the benefits of using Aqua Barrier Water Inflated Dams for Your Dewatering Project.

 Modern-day Uses for the Aqua Barrier

The Aqua Barrier water inflated cofferdam is used for a variety of dewatering projects. Our clients have found them very effective in building boat ramps and bridges, for pipeline construction projects, water park maintenance, shoreline restoration and more.

Learn more about the various uses of the Aqua Barrier and let us help you with your next dewatering project! Contact us for more information.

Aqua Barrier for Various Dewatering Projects

Hydrological Solutions provides industrial products to meet and exceed the demands of a variety of dewatering projects. But what does dewatering actually mean? And how is it used in an industrial setting?

De-codeing Dewatering

Dewatering is a term used to remove water from solid material or soil.  The methods of dewatering vary based on need and specifications for each project.  In order to complete a successful dewatering project, the area needs to have a perimeter around it to secure the area inside to prevent (additional) water to come inside.

Dewatering projects come in all shapes and sizes. Hydrological Solutions’ Aqua Barrier Cofferdam provides a multi-purpose solution to:

Boat ramp Installshoreline rest



Hydro PicBridge



Pipeline repair pic









With an inflatable dam, large boulders and rocky surfaces were not a problem! Cofferdams come in many sizes allowing you to work in water up to 6 feet deep.  An inflatable dam can be installed quickly giving you the edge on competing bidders.  If you are currently searching for a cost effective way to dewater an area to prevent invasive water from entering the job site, our flood barriers were designed to meet those needs.

Contact us today for more information.



Cofferdam Comparison: Inflatable vs. Traditional

Cofferdam Comparison: Inflatable vs. Traditional

What is a Cofferdam?cofferdam

A Cofferdam is one of the best watertight structures specially designed to help construction projects and buildings in a particular region that are usually submerged, like piers and bridges. With exclusive features, the excellent construction permits workers to enact repairs, build structural supports and perform some other jobs in a hassle-free and dry environment. If the construction is not installed properly, then it may create more hazards to the workers. In order to avoid dangerous issues, engineering advancements create a unique work setting and protect the workers properly.

construction-smTraditional Cofferdams

There are several kinds of materials used to create a cofferdam. It is a temporary structure, but it has the capability to hold water back from the particular work area. Along with this, it also has specialized features to withstand greater pressure. The basic cofferdam utilizes sheet metal in order to create an effective watertight wall which can be very expensive and time consuming to install. Other types are built from concrete or wood and other prefer double walled techniques along with filler. There is a wide array of cofferdam constructions available including braced, rockfill, double wall, earth embankment, cantilever sheet pile and cellular cofferdams.

Highlights Of Inflatable Dams#5 far view of barriers fully inflated in dewatered work area

Inflatable cofferdams are more beneficial than any other dam. Hydrological Solutions puts our entire efforts into their design. Our Aqua-Barrier Cofferdams are greatly supported by wide-ranging engineering analysis. The dams are purely custom designed to integrate seamless construction, curtailed stress concentrations, superior clamping, zero or minimal creases and robust flow division control. We design the aqua barrier by using high-strength and powerful fabrics with weather and abrasion resistance features.

Most builders prefer our inflatable dams because they are quick and easy to install and are a cost-effective way for controlling the water flow in an easier and convenient manner. Contact us today for more information or a free quote!