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S 1516119th CongressIn Committee

Cahokia Mounds Mississippian Culture Study Act

Introduced: Apr 29, 2025
Standard Summary
Comprehensive overview in 1-2 paragraphs

This bill, the Cahokia Mounds Mississippian Culture Study Act, would authorize the Secretary of the Interior to carry out a special resource study of three Illinois sites—the Cahokia Mounds State Historic Site, Emerald Mounds, and Pulcher Mounds. The study’s purpose is to evaluate the national significance of the sites, assess the feasibility and suitability of designating the area as a unit of the National Park System, and consider other preservation and interpretation options (including Federal, State, local government roles or private/nonprofit ownership/management). The Secretary would consult with interested parties and develop cost estimates for each preservation alternative. A report detailing the study’s results, conclusions, and recommendations would be due within three years of funds becoming available. The study must be conducted in accordance with a specific provision of the 54 U.S.C. (National Parks) framework. The bill also codifies (in its findings) the substantial historical importance of Cahokia Mounds as a major Mississippian culture hub, noting its size, population, mound construction, and its roles as an early urban center and trade network. The Study Area is narrowly defined to include the Cahokia Mounds State Historic Site, Emerald Mounds, and Pulcher Mounds. Overall, the act sets up a federal, fact-finding process to determine whether these sites should receive formal National Park System designation or pursue alternative preservation paths.

Key Points

  • 1Purpose of the bill: authorize a special resource study to assess national significance, feasibility of National Park System designation, and alternative preservation/interpretation options for the Cahokia Mounds, Emerald Mounds, and Pulcher Mounds.
  • 2Study Area defined: Cahokia Mounds State Historic Site; Emerald Mounds (St. Clair County, IL); Pulcher Mounds (Monroe and St. Clair Counties, IL).
  • 3Study requirements: evaluate national significance, determine suitability/feasibility for NPS designation, consider preservation options by federal/state/local or private/nonprofit entities, consult with stakeholders, and identify cost estimates for each option.
  • 4Legal framework: study conducted under the authority of section 100507 of title 54, U.S.C. (National Parks system-related process); reporting deadline set.
  • 5Reporting timeline: a comprehensive report with findings and recommendations due within 3 years after funds are first made available to conduct the study.

Impact Areas

Primary group/area affected: The federal government (Secretary of the Interior and National Park Service planning) and the Illinois sites themselves (Cahokia Mounds State Historic Site, Emerald Mounds, Pulcher Mounds), along with Indigenous descendants and local communities connected to the Cahokia/Mississippian heritage.Secondary group/area affected: State and local governments, private and nonprofit preservation organizations, researchers, and educational institutions; potential impacts on tourism, interpretation, and site management.Additional impacts: The bill could set the stage for future actions, such as designation as a unit of the National Park System or adoption of alternative preservation/interpretation arrangements; it requires a formal cost appraisal for each option, which could influence funding decisions and community planning.
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