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

Cofferdam Comparison: Inflatable vs. Traditional

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!

Aqua-Barrier Cofferdam Success Story: Fender Marine Construction

Hydrological Solutions Aqua Barrier can be utilized in many different industries. Water control is an element of successful dewatering projects ranging from bridge and dam building to pipeline repairs, shoreline restorations, and in this success story, an attraction at a popular american amusement park.


Cofferdam-For-Pump-Replacement3-600x400Fender Marine Construction is a Florida State Certified Marine Contractor and marine construction consultant company located in Orlando and throughout Florida. Fender Marine Construction’s dedication to using only the highest quality materials installed with the finest workmanship while giving a reasonable price is one reason why they are a highly sought after contractor.  




For their pump repair project, Universal Studios Orlando hired Fender Cofferdam-For-Pump-Replacement1-600x400 (1)Marine Construction to install the Aqua-Barrier inflatable cofferdam. The cofferdam was used to isolate a lagoon in order to allow for the pump repair. After the previous contractors that were hired to conduct the pump repair were not able to fix the problem, Universal Studios sought out the consultation and expertise of Cloud 9 Services, Inc. the parent company of Fender Marine Construction. Due to the versatility of the Aqua-Barrier, the pump was easily isolated and the crew was able to perform the work with ease. The simple and quick installation and removal of the cofferdam allowed the project to be completed on schedule.



Cofferdam-For-Pump-Replacement21-600x400The Aqua-Barrier Cofferdam is designed to be a portable dam that is perfect for a multitude of different dewatering projects that you may be working on and is a more effective  and environmentally safe alternative to sandbags. The key to preventing invasive waters from entering work sensitive areas is the cofferdam’s unique design and engineering. Contact Us today for more information about our cofferdam and how it can be utilized to meet your dewatering needs.



5 Things to Consider for a Successful Cofferdam Project

5 Things to Consider for a Successful Cofferdam Project

Cofferdams are a very effective way to provide dewatering solutions for a number of different projects.  They can be utilized for construction sites, shoreline restoration projects, building bridges, and much more.

Each project’s specifications are extremely individual and can often change depending on the time of year and location.  The experts at Water World, an influential online flood control industry news site, have provided 5 important aspects to consider when you begin your dewatering and cofferdam projects:

1. Depth and Flow
Boat Ramp

These conditions change from season to season. Water World suggests reviewing the timing of the project and consulting the U.S. Geological Survey (USGS) to gauge fluctuations in water levels at the site to determine the best timetable for the project.

2. Permits

“Turbidity requirements, contamination concerns, right-of-way restrictions, and time constraints for working in the water” are all items that may need permits or permission to conduct construction.  Even though it is usually the responsibility of the project engineer to understand and obtain these permits, it is important for the contractor to know these as well.

3. Navigating the Subsurface

Water world suggests that knowing, “the silt levels, slopes, vegetation and composition of the subsurface” to determine the best cofferdam technology and specifications to meet the projects needs.

4. Contractor Experience

Because of the complexity of dewatering projects, it is important to hire contractors who have experience working in and around water. Experience affords the contractor the ability to understand and respond to changing conditions of the work site.  They may have come across overlapping aspects in previous jobs to determine the best solutions for the current project.

5. Engineering and Design Criteria830372

The last aspect a contractor needs to know before beginning the dewatering project is the right cofferdam technology for the project and if the cofferdam’s construction cost meets specifications. “Further, he or she should conclude if the project calls for Professional Engineer Stamped Calculations. The contractor should be well-versed in dam safety protocol and standard operating procedures and also able to provide engineering support in an emergency.”

Understanding and utilizing each of these five tips can better prepare your project for a quick and efficient delivery.  Hydrological Solutions is highly experience in dewatering projects, and understands the uniqueness of each site and the necessary processes for effective cofferdam installation.

Contact us for more information.


Aqua Barrier Cofferdam Formations

There are a variety of cofferdam formations for different project requirements.

Repairs and construction can be very time consuming and expensive.  You have to factor in the materials, time, and labor that produce the best results.  When a project worksite requires a dewatering process, it is important to consider factors such as ease of installation and removal, labor requirements, and effectiveness.

The Aqua Barrier Cofferdam provides the best of all three.  The ease of use and installation allows you to commence your projects in a timely manner without delay.  Each worksite is extremely different, and considering a cofferdam for your project requires many details and specifications to be met.  The Aqua Barrier Cofferdam is extremely versatile in its design and can be used for multiple projects and worksites given the variety of available formations.  Each formation provides the most effective water and flood control based on the worksite requirements.  Below is a  list of the different formations and protection that cofferdams can provide:

Complete Enclosure FormationComplete Enclosure

A complete enclosure formation is beneficial when access to the shoreline is difficult or when a large amount of linear footage is required to reach your work area in the water.




Partial Block FormationPartial

When projects are located in moving water, a partial block formation can be the best option for a cofferdam design.  Since it is not feasible to use a pip diversion or a water pump to maintain upstream water levels, the Partial Block formation of a cofferdam can be the most viable option for dewatering your construction or building site.



Canal Block FormationCanal

A Canal Block Formation is beneficial when working in narrow channels because the system requires only one installation and removal.  Water pumps can be utilized to maintain appropriate upstream water levels.




Straight Shoreline FormationStraight Shoreline

A Straight Shoreline Formation is best utilized when a work area is located in a recessed cove.




Entire Shoreline Enclosure DesignEntire Shoreline

An entire shoreline enclosure design is useful when only one installation and removal is required in the work are.





Multiple Staging ConfigurationMultiple

Multiple Staging Configurations are beneficial when the scope of work involves a large expanse of shoreline because the barriers can be installed and removed in short order.



For more information about Hydrological Solutions Aqua Barrier Cofferdams, Contact Us or visit at www.hydrologicalsolutions.com

April Showers

Flood Solutions

Flood Solutions

As the saying goes, “April showers bring May flowers.”  However, if you are in construction or working for and/or living in a city that is located on a flood plain, those showers may instead bring problems that require solutions.

This is where we at Hydrological Solutions come in.  We specialize in temporary dams and dewatering services.  We have a variety of high-quality, environmentally-friendly dewatering resources to offer that are safe and effective.

Our water-inflated products, such as our Aqua-Barrier® cofferdam and our WIPP® system, can keep flood water at bay:

  • Aqua-Barrier® has our patented internal baffle system that reacts to changing water pressure and keeps the dam stabilized so that it stays where you want it to stay.  It also saves time and money as compared to sheet piling or earthen dams.
  • WIPP® system works well for residential and commercial areas to protect valuable property and minimize the damage that can result from floods, and, unlike sandbags, is environmentally safe, because it does not absorb and collect toxins the way that sand does, so no Hazmat disposal procedures required.  These products are also reusable, and can be tailored in size according to need.

Don’t let April showers cause you to lose time, money, or property.  Instead, let Hydrological Solutions provide you with the dewatering resources to keep everything dry and running smoothly.

For more information, contact Hydrological Solutions today!