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GeoPool® Dewatering System

The IMS GeoPool® system is an innovative dewatering solution that is cost effective, reusable, scalable, and easy to operate.

The system is comprised of a series of rigid steel support frames that are linked together and secured with four heavy-duty safety cables with turnbuckle connections. The interior frame structure is then lined with hi-tech filter fabric and used to filter out water from dredge slurries delivered via pipeline.

The sediments are collected in the GeoPool and the effluent water filters through the fabric via natural settling and gravity. The operator can direct the effluent to a sump by simply creating a trench 4-5 ft. (1.2-1.5 m) away from the base of the GeoPool. The effluent can then be pumped back to its original water source or treatment equipment if necessary.

The patented dump doors, like a weir, allow for rapid release of surface water of the pool to increase storage capacity. This greatly speeds up the dewatering process as a large portion of the water will not need to be filtered through the fabric during the dry down process. The patented clean out gates allow tracked earth moving equipment to move into the pool and unload it so the next fill and dewatering cycle can commence.

For larger scale projects, IMS recommends multiple pools so one pool can be filled while another pool is being cleaned out after the dry down process is complete.

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Features & Benefits

Inexpensive

Since the filter fabric can be easily replaced after it wears out dewatering costs can be reduced significantly. The price to re-line the largest GeoPool which can handle up to 14,000 yds3 (10,704m3) is less than $3,000 US or less than the price of a small single geotextile tube. Maintenance is inexpensive and replacement frames, dump doors, gates, and fabric are a phone call away.

Reusable

The GeoPool’s robust steel construction is hot dip galvanized and made to last. The GeoPool’s clean out gates allow the pool to be cleaned out and be put immediately back into service again and again. 

Scalable

The GeoPool’s modular frames allow it to be sized up or sized down for a specific project based on the allowable foot print or required dewatering capacity.

Rapid Dewatering

The patented Dump Door technology allows for rapid release of settled surface water instead of having to pass directly through the fabric. This bulk dewatering advantage sets the GeoPool apart from other fabric dewatering technologies and mechanical dewatering technologies.

Versatile

The GeoPool can be used to dewater a variety of materials. When discharging ultra fine particles like clay, municipal sludge or certain industrial sludges, it is recommended to use a polymer / floc.

Non-Mechanical

The GeoPool requires no power and has no moving parts reducing overall maintenance and service costs over the lifespan of the equipment.

No Power Required

Since GeoPools require no power they are much less expensive to operate than centrifuges, filter presses, and dryers.

Easy Assembly

The GeoPool does not require an army of dump trucks to haul material in to construct a dewatering berm. Instead 2-4 trucks will deliver the frames to the job site and the modular GeoPool sections can be bolted together with the provided tool kit and hardware kit supplied with the GeoPool. Depending on the size of the pool you can have a complete dewatering site in less than 5-7 days.

NOTE: Specifications subject to change without notice.

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Included with each GeoPool:

  • Filter Fabric (choice of Type-A or Type-B)
  • Assembly hardware kit
  • Assembly tool kit
  • Assembly supervision and on-site training by a factory technician
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Assembly

GeoPool modular frames ready to create a complete GeoPool. The vertical A-Frames come pre-assembled and are bolted into the collapsible frame.
GeoPool modeular frames are connected together to create a complete pool.
Sand bags are used to seal up the base of the GeoPool fabric prior to a fill cycle.
The finishing touches are put on a GeoPool in North Africa.
One of four safety cables is tighted as per the manual, prior to a fill cycle.
A smaller GeoPool is constructed for a permanent dewatering site at a marina in Africa.

Swale

A customer digs out and lines the swale to collect and direct the clear effluent from the GeoPool.
A higher end swale set-up where the GeoPool is recessed vs. a trench swale cut out of dry land.
A complete GeoPool and customer designed swale in Ohio.
A customer set's up a standard water pump for dewatering the swale and sending the water back to the river.
A customer's swale design for dewatering industrial sludge.
A permanent cement dewatering trench is installed for a GeoPool at a marina in Africa.

Fill Cycle

The start of the first fill cycle.
The fill cycle begins on a new GeoPool.
Industrial sludge is pumped into a GeoPool using an excavator mounted pump attachment.
A drone shot of a GeoPool being filled by a 12 inch Ellicott Swinging Ladder dredge.
The GeoPool dries sand down at very high rates and is great for environments where you can't bring in large equipment and dirt to build a standard spoils site.
An IMS 5012 HP Versi-Dredge pumps into a GeoPool to provide clean dirt for the Keystone XL Pipeline project. No polymers used.
A shot of the GeoPool, dredge discharge, Clean-Out Gates.
A close-up of the dark slurry and a customer's rubber ducky.
A Polymer box doses the fine materials to promote faster dewatering. Polymer is recommended for very fine materials.

Dump Doors

Dump Doors prior to opening.
A customer opens the Dump Door shutters on a GeoPool in Ohio.
As a fill cycle nears completion a Dump Door shutter is opened to clear the top of the pool off to make room for the final top off.
A customer opens the GeoPool Dump Doors at a jobs site in North Dakota.

Dewatering Cycle

Activating the fabric for faster dewatering.
Crystal clear effluent pours through the GeoPool's fabric.
A sample of the effluent shown next to the discharge.
A fully activated GeoPool shedding clear water at a rapid rate.
A fully activated GeoPool shedding clear water at a rapid rate.

Dry Down Cycle

A GeoPool at the beginning of the dry down cycle.
Material starts to crack and pull away from the fabric as the pool dries down.
The surface of the material starts to dry down. Note that site studies show that rain had zero impact on dry down meaning no reabsorbtion.
Remaining water makes its way to the edge of the GeoPool during dry down.
A close-up shot of the material drying and cracking as it dries down and shrinks.
Note the streams moving towards the edge of the pool helping the dry down process.
A GeoPool at the first day of dry down.
One of two GeoPools at a power plant in dry down phase.
A customer removes a sample prior to clean-out.
When you dry down and don't clean out then vegetation will grow out of river and lake sediments.
Inside a GeoPool V8 to show the dryness of the material which is ready to be cleaned out and hauled away.

Clean-Out Cycle

Side by side cleanout gates create a 20 ft. (6.1m) wide area for excavators to enter the pool during the clean-out cycle.
The Clean-Out Gates are lowered using an excavator and chain.
The Clean-Out Gates are lowered using an excavator and chain.
An illustration of a typical clean-out cycle using tracked loaders.
A GeoPool in Turkey is ready for excavation.
Material ready for excavation in preparation for the next fill cycle.
The Clean-Out Gates are dropped for the start of a clean-out cycle at a power plant.
A GeoPool during clean-out cycle.
A tracked excavator cleans out a GeoPool in North Dakota.
Loading trucks with material dewatered from a GeoPool.
A GeoPool V8 fabric is cleaned off with a power washer and ready to be refilled. Reusable GeoPool fabric saves the client money every fill cycle.
A tracked excavator readies a GeoPool for another filling cycle..

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