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Abstract Abstract This paper draws on systematic data from the US Forest Service’s (USFS) Planning, Appeals and Litigation System to analyze how the agency conducts environmental impact assessments under the National Environmental Policy Act (NEPA). We find that only 1.9 percent of the 33,976 USFS decisions between 2005 and 2018 were processed as Environmental Impact Statements, the most rigorous and time-consuming level of analysis, whereas 82.3 percent of projects fit categorical exclusions. The median time to complete a NEPA analysis was 131 days. The number of new projects has declined dramatically in this period, with the USFS now initiating less than half as many projects per year as it did prior to 2010. We find substantial variation between USFS units in the number of projects completed and time to completion, with some units completing projects in half the time of others. These findings point toward avenues for improving the agency’s NEPA processes.