Dewatering Tubes for Dredging
Dewatering Solutions to Dewater Material from a Pond
Question: I need to dewater material from a pond and remove an estimated 45 short tons of material. The 45 short tons is the estimated dry weight of the material. This is a large project where we are building two new ponds but need to rehabilitate three old ponds. We are dredging hydraulically, looking to level some ground and lay poly sheets to a collection point.
I noticed in a picture that we might be able to dredge in one pond and put the dewatering geotextile bag in another pond. Is this correct? Does the second pond have to be dry? How does the roll off dumper container work with the bags?
Answer: For the size of your project and the amount of material you are looking to contain, the best option is our Dewatering Tubes. These dewatering products are similar to the dewatering bag, but significantly larger in size. This allows large jobs to dewater and contain their materials.
Dewatering tubes are made in lengths as long as 250 feet and with circumferences anywhere from 15 to 90 feet. Sizing depends on the amount of available space and the size of the particles to be contained.
Depending on the site conditions, you may be able to dredge one pond and place the geotextile bag in the other pond. However, geotubes should not be placed in a pond full of water. If using poly sheets, you may be able to place the dewatering tubes on the sheets along the side of the pond to allow water to flow into it.
Roll-off dump containers can used. Sometimes the containers ease the disposal of dewatering products, but if the material takes a long time to dry, the roll offs need to be rented for a longer period of time.
Polymers to Improve Dewatering Times
An application like dredging requires dewatering a significant amount of material, which can take a longer amount of time. Depending on pump rates and site specifications, polymers may improve flocculation and dewatering times. Polymers can also help geotubes and dewatering bags for silt achieve the highest level of efficiency.
- Evaluate all pumping, dredging, and piping systems. The flow to the dewatering tubes must be controlled through a series of valves and manifolds.
- Contact a polymer specialist to treat the sludge.
- Ensure the necessary management and labor to maintain the dewatering process.
Polymer use can reduce total dewatering time, but it must be carefully monitored during the sediment control operation. Periodic beaker tests can ensure peak performance and maintain TSS thresholds.
Learn more about our Dewatering Process options.