The Oil Pollution Act of 1990 (OPA) seeks to make the environment and public whole for injury to or loss of natural resources and services as a result of a discharge of oil. This means that restoration projects implemented as part of a natural resource damage assessment (NRDA) must be of a sufficient scale to produce resources and services of the same type and quality and of comparable value to those that were lost. Services, for an NRDA, include both the ecological and human uses of the resources. Also, the loss must be quantified from the time of impact until the resource returns to baseline conditions—the level in the absence of the impact. This paper details a series of methods that may be used for scaling NRDA restoration projects and describes how these methods were used in the restoring the injuries incurred as a result of the North Cape oil spill.

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