The Department of Education Office of Elementary and Secondary Education awarded Custer School District 16-1 $673,977 under the Impact Aid Program (CFDA 84.041) on October 1, 2025. The award runs through September 30, 2031 and supports educational services to the school district serving Custer, South Dakota, a region containing significant nontaxable federal lands that reduce the district's local tax base. Impact Aid provides financial assistance to school districts where federal property acquisition has reduced assessed valuation or where federally connected children (those living on federal property, with a parent employed on federal property, or on active duty in the uniformed services) place educational burdens on local agencies unable to tax that property for revenue. Custer School District 16-1 qualifies under Section 7002 criteria, with an aggregate of 10 percent or more of assessed real property valuation acquired by the federal government since 1938. The district is a local government entity registered in SAM.gov since November 2006, operating as a prime federal grant recipient focused on comprehensive K–12 educational services. This assistance type is a Project Grant.