What Is Dewatering and Why Is It Important?

Dewatering is the process of removing water from solid material through a variety of methods, such as filtration or centrifugation. This might occur at a construction site, in sanitation or in mine shafts.

Here are a few examples of some of the circumstances in which dewatering must occur in Bethel, OH, and why it is so important to those processes.

Horizontal drainage

Horizontal dewatering systems are used in a variety of applications. In such a system, a trencher sets up an unperforated pipe and a synthetic or organic wrapped perforated pipe. The length for draining is determined based on the drain’s diameter, the water table height and the conditions of the soil in the area. But in general, you can expect average drain length of approximately 50 meters.

Upon installation of the horizontal drainpipe, technicians hook up a pump to the drain. After lowering the water table, construction can begin over the surface. In such a situation, the dewatering process is used to remove water and lower the water table for surface improvements to occur. Otherwise, too high of a water table can result in surface instability or issues with proper drainage. Once the construction process is complete, pumping can stop and the water table can rise back up safely again.

Deep wells

Deep wells usually feature a bore hole and a slotted liner with an electric submersible pump. When water gets pumped out of the well, a hydraulic gradient forms, and water flows into the well creating a depression cone around it in which little to no water remains in the surrounding soil.

Deep wells are frequently installed in rings around excavation sites as a means of dewatering the site to ensure it is safe for construction or whatever other jobs are to occur there. However, they can also be used to test aquifers and to drain groundwater near wells.


Wellpoints are tubes with small diameters that have slots located near the bottom. These tubes get placed into the ground to draw water out with a dewatering pump. They are most likely to be installed at or around the edge of an excavation site. Usually the height limitations here are about six meters, and the wellpoints may be installed at different heights/stages to make for more effective dewatering.

These tools are frequently used to get groundwater out of sandier soil conditions; they will not be as effective when soil conditions are dense, or when the soil has lots of rock or clay.

Dewatering is a necessary process for many types of jobs, and it’s important to choose the correct method based on your soil conditions, location and desired result. To learn more about the various processes used for dewatering in Bethel, OH and why it’s so important to prioritize high-quality dewatering, we encourage you to get in touch with the technicians at Gullett Sanitation Services Inc. with any questions. We look forward to hearing from you and working with you on any future dewatering or septic projects at your property.

Leave a Reply