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S. 1516 119th Congress Senate

Cahokia Mounds Mississippian Culture Study Act

Official title: A bill to authorize the Secretary of the Interior to conduct a special resource study of the Cahokia Mounds, Emerald Mounds, and Pulcher Mounds in the State of Illinois, and for other purposes.

Introduced: April 29, 2025 Introduced by: Richard J. Durbin Democratic · Illinois See on congress.gov
Public Lands and Natural Resources Government studies and investigationsHistoric sites and heritage areasIllinois
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 Everywhere this bill has been 5 steps
Introduced
In committee
Reported out
Passed House
Passed Senate
To President
Became law
Jul 23, 2026
Placed on Senate Legislative Calendar under General Orders. Calendar No. 478.
Jul 23, 2026
Committee on Energy and Natural Resources. Reported by Senator Lee with an amendment in the nature of a substitute. Without written report.
Feb 4, 2026
Committee on Energy and Natural Resources. Ordered to be reported with an amendment in the nature of a substitute favorably.
Apr 29, 2025
Read twice and referred to the Committee on Energy and Natural Resources. (text: CR S2668)
Apr 29, 2025
Introduced in Senate
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What's happening now July 23, 2026

Placed on Senate Legislative Calendar under General Orders. Calendar No. 478.

 Plain-English summary Congressional Research Service

Cahokia Mounds Mississippian Culture Study Act

This bill directs the Department of the Interior to conduct a special resource study of an area made up of (1) Cahokia Mounds State Historic Site in Collinsville, IL; (2) the Emerald Mounds in St. Clair County, Illinois; and (3) the Pulcher Mounds in Monroe and St. Clair Counties, Illinois. (The National Park Service uses special resource studies when determining whether to designate sites as National Historical Sites.)

The study must

  • evaluate the national significance of the study area;
  • determine the suitability and feasibility of designating the study area as a unit of the National Park System;
  • consider other alternatives for preservation, protection, and interpretation of the study area by other governmental entities or nonprofit organizations; and
  • identify cost estimates for any federal acquisition, development, interpretation, operation, and maintenance associated with such alternatives.

Interior must report on the results of the study and make recommendations to specified congressional committees.

 Hearings & markups 1
 Bill text 2 versions

Source documents hosted by congress.gov.

 Committees of jurisdiction 1
 Lobbying activity 2

Registered lobbyists who named this bill in their disclosure filings. Source: federal Lobbying Disclosure Act filings.

Bodies those filers lobbied

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 Cosponsors 1
All 1 Democratic 1
D
Duckworth, Tammy
Illinois · Apr 29, 2025
Cite this page click to expand
APA
U.S. Congress. (2026). S. 1516: Cahokia Mounds Mississippian Culture Study Act. 119th Congress. Open America. https://openamerica.io/bill/119-S-1516/
MLA
"S. 1516: Cahokia Mounds Mississippian Culture Study Act." 119th Congress, 2026, Open America, https://openamerica.io/bill/119-S-1516/.
Bluebook (legal)
S. 1516, 119th Cong. (2026), https://openamerica.io/bill/119-S-1516/.
Markdown link
[S. 1516: Cahokia Mounds Mississippian Culture Study Act](https://openamerica.io/bill/119-S-1516/)
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