PlainBillCongress, translated.Legislation. Context. Public interest.Placed on Senate Legislative Calendar under General Orders. Calendar No. 478.
Congressional Research Service
Version 00 · Introduced in Senate · Apr 29, 2025
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.
People & committees
Sen. Durbin, Richard J. [D-IL] · D–IL
Legislative record
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Placed on Senate Legislative Calendar under General Orders. Calendar No. 478.
Committee on Energy and Natural Resources. Reported by Senator Lee with an amendment in the nature of a substitute. Without written report.
Committee on Energy and Natural Resources. Reported by Senator Lee with an amendment in the nature of a substitute. Without written report.
Committee on Energy and Natural Resources. Ordered to be reported with an amendment in the nature of a substitute favorably.
Read twice and referred to the Committee on Energy and Natural Resources. (text: CR S2668)
Introduced in Senate
Primary sources
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No related bills are listed in this snapshot. This does not establish whether the proposal has appeared in earlier Congresses.
Source last updated: Sep 25, 2026. Consult Congress.gov for the current record.
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