Directs the Secretary of the Interior to study whether the Cahokia Mounds State Historic Site and two nearby mound sites in Illinois should become part of the National Park System.

Official title: Cahokia Mounds Mississippian Culture Study Act

Next stop Senate floor: awaiting a vote

Timeline each lane is a chamber; dates pull from congress.gov actions

Senate

Introduced 29-APR-2025

Referred 29-APR-2025

Approved by committee 04-FEB-2026

Reported 23-JUL-2026

On the calendar 23-JUL-2026

Key points

Authorizes a special resource study of the Cahokia Mounds State Historic Site, the Emerald Mounds in St. Clair County, and the Pulcher Mounds in Monroe and St. Clair Counties
Evaluates the sites' national significance and the suitability and feasibility of designating them as a National Park System unit
Considers other preservation options led by federal, state, local, private, or nonprofit entities, with cost estimates for federal involvement
Requires consultation with applicable Indian Tribes and a report to the Senate and House committees within 3 years after funds are made available

AI-generated from the Reported to Senate text of 23-JUL-2026 · verify · report an error

Official CRS summary

Covers an older version. The newest CRS summary describes the bill as of "Introduced in Senate" (29-APR-2025); the text has changed since (Reported to Senate, 23-JUL-2026).

CRS is the Library of Congress's nonpartisan research office. Read it on congress.gov

Committee referrals (1)

Energy and Natural Resources Committee (Senate)

Policy area

Public Lands and Natural Resources

Sponsor Richard J. Durbin (D-IL) Cosponsors · 1

■ 1 D

1 Democrat

Tammy Duckworth

congress.gov page Reported to Senate (23-JUL-2026) Introduced in Senate (29-APR-2025)