US Patent 7074326 Curb-and-grate inlet filter

A curb-and-grate inlet filter is provided for temporarily covering, during nearby construction activities, the curb-and-grate inlet of a storm drainage system so as to filter from storm water runoff silt and debris attendant such construction. The curb-and-grate inlet filter includes a body having a first and a second portion formed of interconnected coils. The filter also includes a filter medium that may enclose the body. The filter medium filters silt and debris from water passing through the filter and into the curb-and-grate inlet.