SedCatch® Sediment Basket™ —"Below
the Grate" Inlet
Protection
Why use a SedCatch® Sediment
Basket™?
SedCatch® brings the strength of wireback from silt
fence to inlet protection. It is not dependent upon the
strength of seams or fabric to provide support. Furthermore,
the fabric is not as susceptible to damage from emptying;
the 2 piece design virtually eliminates the abrasion, pulling,
and tearing while emptying sediment.
Overflow prevents standing water
82% Efficient (when not in flood stage)
Dump basket makes sediment removal fast and easy.
No assembly required
Provide grate dimensions to order
Wireback supported geotextile
SedCatch® Sediment Basket™ collects sediment in a convenient
dump basket. They are manufactured with an overflow cutout
to allow floodwaters to pass without street ponding.
They can be installed under round, square, rolled, and rectangular
grates.
To Order:
Provide dimensions of the grate, or you can provide us
with the manufacturer’s grate number.
Check that there are no obstructions to the basket hanging below
the grate.
All Shapes and Sizes
Emptying Dump Basket
The removal of the sediment in the above photos series took less
than two minutes
from start to finish. Sediment is collected in a convenient Dump Basket™.
The two-basket design makes it easy to empty and replace with less wear and tear
so it lasts longer than other products. Since one does not have to pick up both
the grate and the sediment at the same time, it is not necessary to use equipment
to empty the Sediment Basket™.
Overflow Cutout
Every Sediment Basket is made with overflow cutouts. If ponding of
water is a concern, simply cut the fabric stretched across the overflow
orifice prior to installation. It will filter all of the water until
flood stage; allow flood waters to pass while only collecting the heaviest
of particles, i.e. gravel; and then filter the water once again after
the water surface drops below flood stage. Use as many cutouts as needed.
Independent Testing Results
The SedCatch® Sediment Basket™ was subjected to full scale testing by TRI/Environmental, Inc. The test was performed in general accordance with ASTM D 7351, Standard Test Method For Determination Of Sediment Retention Device Effectiveness In Sheet Flow Application, though the protocol was modified to present the flow from the storm event to an inlet. In order to make the test as realistic as possible, the test was allowed to continue the entire duration of the storm event. Unfortunately, the storm will not end because the inlet protection device is full.
On the 1.5% Sediment Load Test, all of the water was filtered and it collected in excess of 80% of the sediment load introduced.
On the 6% Sediment Load Test, it initially filtered 100% of the water. Over time; the accumulated sediment reduced the filtering capacity of the device such that some of the water passed through the overflow. In practice, as flows taper off, once again 100 % of the water would be filtered. It still collected nearly 64% of the introduced sediment for the entire rain event.
Rolled Grates
These sediment baskets were made for rolled grates. To order,
all we need to know is the size and shape of the grate to send you
the correct size Sediment Basket. We can also work off of the
grate manufacturer grate number.
Periodic Emptying of Main Basket
After approximately 10-20 dumps, enough sediment will have made its
way around the dump basket that the main basket should be emptied of
sediment as shown. It still only takes minutes, and no equipment required.
Combination Inlets
Use a Sediment Basket along with a diversion dam to provide protection
for a combination inlet. The dam will direct all of the water thru the
grate and into the Sediment Basket during low flows, filtering 100%
of the water. If flows exceed the capacity of the Sediment Basket the
water will still have to pass over the grate, where the Sediment Basket
will collect large sediment particles (mainly gravel) before the water
goes over the dam. Once the flows subside it will once again provide
filtering to 100% of the water
Emptying Dump Basket 3
Fabric Specification
We have selected the geotextile with the properties that give the best
results under most circumstances. If your site is unique and/or if the
engineer or inspector has a preference for a different geotextile specification,
we can manufacture the sediment basket with the requested fabric. We
probably have the geotextile in stock and can accommodate your request
with a two week lead time.
Standard Drawings
FAQ for SedCatch® Sediment Basket ™
Can you buy replacement liners?
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.
Will it cause roadway ponding.
All Sediment Baskets are constructed with overflow cutouts. Simply cut open
enough cutouts (at least enough to exceed the capacity of the storm sewer
system) so if there is ponding in the roadway it would have happened regardless
if the inlet protection would have been installed or not.
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.
Patents
Sediment Baskets™ are protected by the following patents: D598,196,
D600,324, other patents pending.
