US SB1516

Secretary of the Interior must conduct a special resource study of Cahokia Mounds State Historic Site, Emerald Mounds, and Pulcher Mounds in Illinois to evaluate national significance and feasibility of National Park System designation

Study must assess preservation alternatives by federal, state, local, and private entities, and identify cost estimates for federal acquisition, development, and operation

Report with findings and recommendations due to Congress within 3 years of receiving funding

Cahokia was a Mississippian culture city inhabited A.D. 700-1400, covering nearly 6 square miles with 10,000-20,000 residents at its peak, and over 120 mounds built at the site

Site currently holds National Historic Landmark, Illinois State Historic Site, and UNESCO World Heritage Site designations