In conjunction with the University of New Hampshire (UNH) Stormwater Center and the US Environmental Protection Agency (US EPA), VHB developed a key tool for improving Southeast New England’s water resources—the New England Stormwater Retrofit Manual, which provides research-based guidance on planning, siting, and designing retrofit stormwater control measures (SCMs) for managing stormwater in developments that do not fit within current regulatory specifications or framework.
The manual and its approaches serve as a resource for supplemental guidance in making smart site design choices to mitigate stormwater impacts from existing developed areas, and is intended to be used as a compliance tool for several of the New England impaired waters and Total Maximum Daily Load (TMDL) programs including the MS4s, RIDOT’s consent decree, Connecticut’s MS4 and new/redevelopment requirements, and Residual Designation Authority (RDA) requirements in Massachusetts and New Hampshire.
