Dredging Barge Silt Curtain
Using Floating Silt Curtain in a Large Retention Pond
Question: I have an unusual situation and may need a dredging barge silt curtain. We have a large grading site that drains to a retention pond. The pond has filled partially with erosion from the grading project due to large rains. We have an outlet structure for the retention pond. We are looking at reducing the silt and turbidity that is leaving the pond through the outlet structure until we can clean out the sediment.
Currently, the outlet structure consists of an end of a pipe covered with clean stone and wrapped in fabric. There is also a wire into a concrete structure. Is there a floating silt curtain that will work? Does this still let water flow through the material or does it cut off the water flow?
Answer: Thank you for contacting us! To answer your last question, the Floating Silt Curtain does not typically come with ability to allow water to flow through the skirt. In general, silt curtains are designed to contain required materials and prevent them from spreading to further areas around your location.
We do offer specialty silt curtains that feature geotextiles installed within the skirt. The geotextile fabric allows water to filter through the skirt. Read more about our different Turbidity Barrier options.
Additional Product Considerations for Dredging
After looking over the type of filtering you are trying to achieve, there are a couple of different products you might also consider for this type of application.
The main product we recommend is the Taurus Dewatering Bag. This bag is made from a nonwoven geotextile fabric that is specifically designed for to filter water. Before you allow water to leave your retention pond, the entire pond could be dewatered. This would allow for a significant amount of silt and sediment to filter out of the pond prior, leaving clean water for disposal.
Dewatering bags can hold various amounts of sediment and silt depending on their size. Our silt filter bags have commonly been used instead of, or in addition to, a dredging barge silt curtain.
If you are looking for a product similar to what you are already using, you might also consider the Filter Sock. This product connects to the end of discharge pipes to help filter out water as it is leaving the pipe. The filter sock has less capacity than the dewatering bag, so it is generally attached to smaller hoses and pipes.
This product may work, depending on much sediment needs to be retained. Filter socks use either the regular nonwoven geotextile fabric or an X-tex material that can successfully filter oil, sediment, and silt.