An overview of the U.S. Environmental Protection Agency's storm and combined sewer program collection system research

A state-of-the-art and assessment of the USEPA'S Storm and Combined Sewer Program collection system research pertaining to management alternatives for wet- and dry-weather wastewater transport and interception is presented. These include: maintenance; catchbasins; new sewer design; sewer flushing; polymer injection; infiltration/inflow controls including inflow reduction. Insituform, impregnated concrete pipe and trenchless sewer; upstream storage/attenuation; flow routing and in-pipe storage; new types of flow regulators including swirl and helical bend regulator/concentrators, fluidic regulator and Hydrobrake; and a new rubber “duck-bill” tide gate. The emphasis is on optimal use of the existing sewerage system and optimal city-wide cost-effective strategy for the dual purpose of combined sewer drainage and overflow pollution control.