Cahokia Mounds Mississippian Culture Study Act

This bill directs the Secretary of the Interior to conduct a special study of three Illinois sites (Cahokia Mounds, Emerald Mounds, and Pulcher Mounds) to evaluate their national significance and assess whether they should become part of the National Park System. The study must consider alternatives for preservation, protection, and public interpretation by federal, state, local, or private entities, and consult with relevant stakeholders. It requires a report to Congress within three years, detailing findings and recommendations. The bill does not change current designations (the sites are already National Historic Landmarks, Illinois State Historic Sites, and UNESCO World Heritage Sites) but initiates a formal review process. This study directly affects federal agencies responsible for historic preservation and may inform future decisions about the sites' management.