Catch Basin | Storm Water Management Nassau & Suffolk County Long Island
Catch Basin Repair & Storm Water Management
A catch basin or storm drain is an inlet to the storm drain system that typically includes a grate or curb inlet where stormwater enters the catch basin and a sump to capture sediment, debris and associated pollutants. They are also used in combined sewer watersheds to capture floatables and settle some solids. Catch basins act as pretreatment for other treatment practices by capturing large sediments throughout the Nassau & Suffolk County Long Island area. The performance of catch basins at removing sediment and other pollutants depends on the design of the catch basin (e.g., the size of the sump), and routine maintenance to retain the storage available in the sump to capture sediment.
Applicability catch basins are used in drainage systems throughout the United States. However, many catch basins are not designed for sediment and pollutant capture. Ideal application of catch basins is as pretreatment to another stormwater management practice. Retrofitting existing catch basins may help to improve their performance substantially. A simple retrofit option of catch basins is to ensure that all catch basins have a hooded outlet to prevent floatable materials, such as trash and debris, from entering the storm drain system.
Limitations catch basins have three major limitations, including:
1) Even carefully designed catch basins cannot remove pollutants as well as stormwater treatment practices, such as wet ponds, sand filters, and storm water wetlands.
2) Unless frequently maintained, catch basins can become a source of pollutants through resuspension.
3) Catch basins cannot effectively remove soluble pollutants or fine particles
In some regions, it may be difficult to find environmentally acceptable disposal methods. The sediments may not always be land-filled or land-applied due to hazardous waste, pretreatment or groundwater regulations. This is particularly true when catch basins drain runoff from hotspot areas.
Typical vactor trucks can store between 10 and 15 cubic yards of material, which is enough storage for between three and five catch basins with the "optimal" design and an 18" inflow pipe on Long Island New York.
Assuming semi-annual cleaning, and that the vactor truck could be filled and material disposed of twice in one day, one truck would be sufficient to clean multiple catch basins. Another maintenance cost is the staff time needed to operate the truck. Depending on the rules within a community, disposal costs of the sediment captured in catch basins throughout Nassau & Suffolk County, Long Island are significant.
In some regions, it may be difficult to find environmentally acceptable disposal methods. The sediments may not always be land-filled or land-applied due to hazardous waste, pretreatment or groundwater regulations. This is particularly true when catch basins drain runoff from hotspot areas.
Typical vactor trucks can store between 10 and 15 cubic yards of material, which is enough storage for between three and five catch basins with the "optimal" design and an 18" inflow pipe on Long Island New York.
Assuming semi-annual cleaning, and that the vactor truck could be filled and material disposed of twice in one day, one truck would be sufficient to clean multiple catch basins. Another maintenance cost is the staff time needed to operate the truck. Depending on the rules within a community, disposal costs of the sediment captured in catch basins throughout Nassau & Suffolk County, Long Island are significant.
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