What is the Best Dewatering Method?

January 17th, 2019
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When you're working on a construction site, dewatering could save your project

Dewatering is a method of removing excess water from the ground to dig, build, or keep water from pooling in areas it shouldn't. It is a method used on construction sites for companies to work without delay. 

What is the best dewatering method? It depends on your needs and your soil. Get ready to learn more and see which method is best for your needs. 

The Channel Method

The simplest method for construction sites is to build a channel for the water to travel away from the site. 

This dewatering system transports the excess water to a holding area away from construction. The channels are usually lined with metal or plastic to prevent water from seeping back out. 

The benefit to this method is it is cheaper than using a pump and easier to set-up for crews pushing a deadline. 

If you choose this method, you will have to watch out for erosion and be sure the only thing moving through the channel is water. Be cautious of oil, chemicals, and other substances attributed to construction that may end up in the process. 

The Pumping Methods

More often than not, dewatering pumps are the way you will want to go. Depending on the type of soil and how large a project you have-- that will determine the type of pump you need. 

Sump Pump

For small construction projects,  the sump pump is the best method for you. 

Best in rocky or gravelly soils, water, and some solids collect in sump containers and are then transported away from the area. Drainage can lead to a larger container or a runoff. 

This method is not best if you have sandy or fine soil because it can cause buildup and unstable ground conditions. It is also only capable of removing small amounts of water at a time making it not a good choice for larger construction jobs. 

Wellpoint 

Much like the sump pump, the wellpoint method is used in shallow areas. Small wells are buried along the construction site and connect to a pipe that draws the water out. 

These well points are easy to install. It differs from the sump pump method because rather than letting water seep in and collect on its own, the well points draw out the water. 

This method is effective in any soil-- which makes it popular with most construction companies. 

Deep Well

If you have a larger project or deep excavation-- a deep well is going to be your best method. 

An alternative to the wellpoint method, you will need to do more drilling and get heavier equipment to pump the water out. Best for deeper, coarse soil, this method is really only necessary for large construction projects. 

Multiple wells are pumped at once, unlike the wellpoint method, and can provide quick relief from excess water. 

Choosing the Right Dewatering Method

Before you dig, think about which dewatering method is right for you. 

The best thing you can do is reach out to a professional who can analyze your soil, project-type, and work with you on choosing the right method. 

Hydrograss Technologies can do just that! Contact us today to learn more about what we can do to help your next project!