ENVIRONMENTAL CONSEQUENCES
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METHODS FOR ASSESSING IMPACTS
Threatened and Endangered Species
The impact types, levels, and definitions presented for threatened and
endangered species are those defined by the U.S. Fish and Wildlife Service under
section 7 of the Endangered Species Act (USFWS and NMFS 1998). Further
information concerning the Endangered Species Act and procedures related to
section 7 may be obtained at: http://endangered.fws.gov/consultations/
s7hndbk.htm.
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No effect – when the alternative would not affect a listed species or
designated critical habitat.
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Not likely to adversely affect – when the affects of the alternative are
expected to be discountable, insignificant, or completely beneficial.
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May effect – when the alternative may pose any effect on listed species or
designated critical habitat.
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Likely to adversely affect – any adverse effect to the species that may occur
as a direct or indirect result of the alternative and the effect is not
discountable, insignificant, or completely beneficial.
