An EFH assessment is a written assessment of the effects of a proposed Federal action on EFH. Federal agencies must provide the National Marine Fisheries Service (NMFS) with an EFH assessment for any action that may adversely affect EFH, except for those activities covered by a general concurrence. An EFH assessment must contain 1) a description of the proposed action; 2) an analysis of the effects, including cumulative effects, of the proposed action on EFH and managed species; 3) the Federal agency's conclusions regarding the effects of the action on EFH; and 4) proposed mitigation, if applicable. If appropriate, the EFH assessment should also include the items listed at 50 CFR 600. 920(e)(4). The level of detail in an EFH assessment should be commensurate with the potential impacts to EFH.