Frequently Asked Questions
SedCatch® Sediment Cage™
Should I use a Sediment Cage or Sediment Basket?
If you are working in a paved setting, use a Sediment Basket. If you are working in an unpaved setting, use a Sediment Cage.
When should a Sediment Cage™ be installed?
The best time to install a Sediment Cage™ is when the basin is set up. It will keep sediment out, thereby keeping the job in compliance. Since it rests on the apron, you don’t even have to wait to backfill.
How do you install a Sediment Cage™?
Installing the grate takes just minutes. Lift the grate, set the cage over the grate, tuck the geotextile skirt under the grate, and
replace the grate.
Will it get in the way of final grading?
No, the cage is installed and stays in with a pre-cast structure. It sits on top of the inlet and doesn’t require any landscaping or stakes. The final grading can be done with the Sediment Cage in place.
Can a Sediment Cage™ be removed without requiring landscaping repairs?
Yes, simply lift the grate and remove Sediment Cage™. It does not require a pick, hammer, shovel or stakes, and you don’t have any trash to dispose of. Remove and store for re-use.
Is a Sediment Cage™ reusable?
The heavy monofilament geotextile is so strong and well supported by the wire that they can be used on several different jobs.
SedCatch® Sediment Basket™
Can the fabric be replaced?
Yes, but you will probably never need one. Since all of the sediment is collected in the dump basket for easy removal, the wear and tear is minimal. In addition, the exclusive wire backing takes the stress off the geotextile so there is little stress on the fabric.
What happens if a Sediment Basket is neglected?
We know a number of baskets that were left in place for 6 months or more without servicing. They continued to allow water flow through the grate even though they were nearly full with sediment. The sediment needed to be removed and the geotextile cleaned but they were still intact and operational.
Why can a Sediment Basket™ use a low diverter while other devices must use a higher dam?
The primary method by which a Sediment Basket collects sediment is from filtering the water. The diverter only needs to be high enough to divert as much water as can be filtered. The second method is from collecting the heavy sediment that is being pushed along by the water. When the sediment is pushed to the diverter, it drops straight down into the basket. Our trials have shown that a 1-1/2” high diverter works best. A much higher dam is needed when using the grate cover and tube method. Their dam has to be high enough to cause unwanted ponding and for the sediment to accumulate in the street.
Why is our standard fabric a woven geotextile instead of non-woven?
Non-woven geotextiles initially give very high flow rates and would appear to be a good choice for this application; however, once they go through a few storm cycles their flow rates can drop 60 to 80 percent. Woven geotextiles maintain their flow rates better over time.