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Biological Assessment

TRA specializes in many types of biological studies and impact assessments. TRA prepares biological surveys to evaluate existing conditions and the presence of sensitive habitat or special status plant or animal species and applicable laws pertaining to the resources found. Biological impact assessments evaluate the effects of a proposed project on biological resources and are used to support CEQA/NEPA documents and permit applications. TRA also prepares Biological Assessments which present both survey and impact information in the specific format set forth by the US Fish and Wildlife Service (USFWS) or the National Marine Fisheries Service (NMFS). TRA maintains a strong working relationship with various staff at the USFWS and the NMFS. We facilitate Federal Endangered Species Act consultations with the federal government to obtain agency concurrence with project findings of No Effect or Not Likely to Adversely Affect endangered species. TRA also provides the technical support required for Endangered Species Act Section 7 or Section 10 consultations and California Fish and Game 2081 permits.

Staff members are familiar with all of the research methods and databases that the resource agencies expect to see in biological site assessments, including the California Natural Diversity Database, the Wildlife Habitat Relationships Database, the Manual of California Vegetation, state and federal survey protocols, California Native Plant Society protocols, and the usual field guides and floras. We have expertise in assessing the potential occurrence of many sensitive species, including California red-legged frog, California tiger salamander, many butterfly species, birds such as Western burrowing owl, and mammals such as San Joaquin kit fox, dusky-footed wood rat, and bats. When needed, TRA works with a network of subcontractors with special expertise in particular endangered species or local resources.