TRB's National Cooperative Highway Research Program (NCHRP) Research Report 840: A Watershed Approach to Mitigating Stormwater Impacts provides a practical decision-making framework that will enable state departments of transportation (DOTs) to identify and implement offsite cost-effective and environmentally beneficial water quality solutions for stormwater impacts when onsite treatment and/or mitigation is not possible within the right-of-way.
The report is accompanied by the Watershed-Based Stormwater Mitigation Toolbox, a Microsoft Excel-based program to facilitate the characterization of the project watershed and the identification of mitigation options at the planning level.
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National Academies of Sciences, Engineering, and Medicine. 2017. A Watershed Approach to Mitigating Stormwater Impacts. Washington, DC: The National Academies Press. https://doi.org/10.17226/24753.
|Chapter 1 - Introduction||3-5|
|Chapter 2 - Watershed-Based Mitigation Datasets||6-14|
|Chapter 3 - Methods to Develop Mitigation Options||15-35|
|Chapter 4 - Framework for Evaluating Off-Site Mitigation Options||36-57|
|Chapter 5 - Using Local Planning Information to Support the Mitigation Decision Process||58-63|
|Chapter 6 - Linking Project Impacts to Mitigation Alternatives in the WBSMT||64-78|
|Chapter 7 - Watershed-Based Mitigation Toolbox Case Study||79-93|
|Chapter 8 - Conclusions||94-94|
|Abbreviations and Acronyms||100-101|
|Appendix A - Out-of-Kind Mitigation Assessment Approach||104-118|
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