Natural Resource Damage Assessment

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oil skimming at Deep Water Horizon spill

Natural Resource Damage Assessment (NRDA) is a legal process that federal agencies, together with affected states and Indian tribes, use to evaluate the impacts of oil spills, hazardous waste sites, and ship groundings on natural resources both along the nation's coast and throughout its interior. NRDA partners, referred to collectively as "natural resource trustees", work through a formal process authorized under the Oil Pollution Act and Comprehensive Environmental Response, Compensation, and Liability Act to identify the extent of natural resource injuries, the quantity and quality of restoration necessary to compensate the public for those damages. A number of methods have been developed for completing this work, including Habitat Equivalency Analysis and Resource Equivalency Analysis. NRDA is also authorized under the state Model Toxics Control Act, but with less clarification around methods and requirements.

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