To adjust the boundary of the Sacramento-San Joaquin Delta National Heritage Area, and for other purposes.

HR 6476 adjusts the boundary of the Sacramento-San Joaquin Delta National Heritage Area by adding the "Rio Vista/Expansion Area" as depicted on a February 2021 map. This change directly affects landowners and communities within the newly included geographic area. The bill makes a technical boundary update to the existing heritage area designation without altering its management or funding mechanisms. It is a procedural adjustment to the established boundaries of the federally recognized heritage area.