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The public record · 119th Congress

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.

Other titles

the names this measure carries besides the one at the top of this page, each with the record's own label for it. The collection includes titles given to parts of a bill as well as to the whole.
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.Official Title as Introduced
Cahokia Mounds Mississippian Culture Study ActShort Title(s) as IntroducedShort Title(s) as Reported to Senate

Legislative history

S. 1516·Senate·Bill·Public Lands and Natural Resources
Sen. Richard J. Durbin(Democratic-Illinois)·
Apr 29, 2025
SenateRead twice and referred to the Committee on Energy and Natural Resources. (text: CR S2668)
Feb 4, 2026
Senate · CommitteeCommittee on Energy and Natural Resources. Ordered to be reported with an amendment in the nature of a substitute favorably.
Jul 23, 2026
Senate · CommitteeCommittee on Energy and Natural Resources. Reported by Senator Lee with an amendment in the nature of a substitute. Without written report.
Jul 23, 2026
SenatePlaced on Senate Legislative Calendar under General Orders. Calendar No. 478.

Documents

Everything Congress printed about this measure. A bill is reprinted each time it changes, the Congressional Research Service summarizes each version, and the committee that reports a bill files its own written account of it.
Bill text
Jul 23, 2026As reported by the Senate committeeApr 29, 2025As introduced in the Senate
Plain-language summaries
Apr 29, 2025Introduced in Senate
Where it stands
In committee — the Senate
On the floor — the Senate
In committee — the House
On the floor — the House
Resolving differences
With the President
Became law
Path for a Senate bill