| Ditch Chexx™ are made from a compost material contained in a mesh tube of various diameters for varying situations and directional flows. Filtrexx™ Ditch Chexx™ are used for filtering channel flow of sediment-laden waters generated from construction activities during storm events. Ditch Chexx™ help to slow water flow, creating a settling and filtering effect of settleable solids contained in stormwater runoff. Compost used in Filtrexx™ Ditch Chexx™ may also have the ability to chemically bind various chemicals contained in runoff.
Conditions where practice applies
Ditch Chexx™ can be used in place of traditional methods of ditch erosion and sediment control tools, including straw bales, silt fence, amongst other methods. Filtrexx™ Ditch Chexx™ can be used in small open channels where it is necessary to slow down the velocity of the stormwater prior to leaving the ditch area. Applications include temporary runoff channels, swales, and other areas that may be used as an integrated approach to overall erosion and sediment control plans for the project.
Design Criteria
Design limits - Filtrexx™ Ditch Chexx™ are not reliable as the only form of erosion and sediment control for an entire project. Filtrexx™ Ditch Chexx™ are normally 12”{30cm} or 18”{45cm}in diameter and are limited in the amount of water they can treat due to limited height and width across the channel. Filtrexx™ Ditch Chexx™ should be used in combination with other tools as an integrated approach.
Spacing – see specifications. In general, Filtrexx™ Ditch Chexx™ should be installed every 20-75 feet{6-23m}, depending on the slope and amount of water requiring treatment. In areas of high rainfall, closer spacing is required. In dryer areas, larger spacing between FilterSoxx™ and smaller diameters may be sufficient.
Orientation – In general, the Filtrexx™ Ditch Chexx™ should be installed with the ends of the materials forming a “U”-shaped figure towards incoming channeled water, so as to create a ponding effect rather than a deflecting, or water shedding, effect. In the event water runs over the FilterSoxx™ in severe storm events, the water should run over the center of the FilterSoxx™, not around the ends.
Staking – Minimally, the ends and center of the Filtrexx™ Ditch Chexx™ should be staked to hold the product in place. Under severe flow situations and longer installations, more stakes may be required at an interval of every 5 feet{1.5m}.
Planning considerations
Filtrexx™ Ditch Chexx™ are able to achieve a large ‘footprint’ of ground contact when installed properly. Filtrexx™ Ditch Chexx™ should be pressed into place to achieve a maximum contact with the ground surface. If ground contact is a concern, consider using the Filtrexx™ Flap system which allows more ground contact and energy dissipation.
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