; and (2) a report that describes, with respect to the preceding year— (A) the number and substance of projects that are subject to arbitration under section 314; and (B) the outcomes of the arbitrations under that section. C Categorical exclusions 331. Definitions In this subtitle: (1) Catastrophic event The term catastrophic event means any natural disaster (such as hurricane, tornado, windstorm, snow or ice storm, rain storm, high water, wind-driven water, tidal wave, earthquake, volcanic eruption, landslide, mudslide, drought, or insect or disease outbreak), or any fire, flood, or explosion, regardless of cause. (2) Categorical exclusion The term categorical exclusion means an exclusion from the requirement to prepare an environmental assessment or an environmental impact statement under section 102 of the National Environmental Policy Act of 1969 ( 42 U.S.C. 4332 ) for a category of forest management activities. (3) Forest management activity The term forest management activity means a project or activity carried out by the Secretary on National Forest System land, consistent with the forest plan covering that land. (4) Salvage operation The term salvage operation means a forest management activity carried out in response to a catastrophic event, the primary purpose of which is— (A) to prevent wildfire as a result of the catastrophic event, or, if the catastrophic event was wildfire, to prevent a reburn of the fire-impacted area; (B) to provide an opportunity for use of forest materials damaged as a result of the catastrophic event