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S. 1516
U.S. Senate•Senate Floor Calendar
Summary
S. 1516, the Cahokia Mounds Mississippian Culture Study Act, was introduced in the Senate on Apr 29, 2025 by Sen. Richard Durbin (D) with 1 co-sponsor. It last saw action on Jul 23, 2026: Placed on Senate Legislative Calendar under General Orders. Calendar No. 478.
Record
Text
S. 1516 has 1 co-sponsor.
sb1516/introduced-in-senate.txt119 S1516 IS: Cahokia Mounds Mississippian Culture Study ActU.S. Senate2025-04-29text/xmlENPursuant to Title 17 Section 105 of the United States Code, this file is not subject to copyright protection and is in the public domain.II 119th CONGRESS 1st Session S. 1516 IN THE SENATE OF THE UNITED STATES April 29, 2025 Mr. Durbin (for himself and Ms. Duckworth ) introduced the following bill; which was read twice and referred to the Committee on Energy and Natural Resources A BILLTo 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.1.Short titleThis Act may be cited as the Cahokia Mounds Mississippian Culture Study Act .2.FindingsCongress finds that—(1)the city of Cahokia—(A)was inhabited from approximately A.D. 700 to 1400; and(B)at its peak from A.D. 1050 to 1200—(i)covered nearly 6 square miles; and(ii)was home to 10,000 to 20,000 people;(2)more than 120 mounds were built over time at the site of the city of Cahokia;(3)the site of the city of Cahokia is named for the Cahokia subtribe of the Illinois Confederation, who moved into the area in the 1600s;(4)the city of Cahokia was the central hub and largest city of the Mississippian culture that ruled and traded across half of North America, more than 1,250,000 square miles;(5)the city of Cahokia—(A)was the first known organized urbanization and government north of Mexico; and(B)at its peak, was larger than most European cities, including London;(6)some of the Cahokia Mounds, which were built from A.D. 900 to 1400, still stand as earthen monuments and remnants of Mississippian culture, which is the greatest prehistoric ancient culture in North America, the people of which are ancestors to many of today’s First People and Nations; and(7)the Cahokia Mounds are designated as—(A)a National Historic Landmark;(B)an Illinois State Historic Site; and(C)a United Nations Educational, Scientific, and Cultural Organization World Heritage Site.3.DefinitionsIn this Act:(1)SecretaryThe term Secretary means the Secretary of the Interior.(2)Study areaThe term Study Area means—(A)the Cahokia Mounds State Historic Site;(B)the Emerald Mounds in St. Clair County, Illinois; and(C)the Pulcher Mounds in Monroe and St. Clair Counties, Illinois.4.Special resource study(a)StudyThe Secretary shall conduct a special resource study of the Study Area.(b)ContentsIn conducting the study under subsection (a), the Secretary shall—(1)evaluate the national significance of the Study Area;(2)determine the suitability and feasibility of designating the Study Area as a unit of the National Park System;(3)consider other alternatives for preservation, protection, and interpretation of the Study Area by—(A)Federal, State, or local governmental entities; or(B)private and nonprofit organizations;(4)consult with—(A)interested entities of the Federal Government or State or local governmental entities;(B)private and nonprofit organizations; or(C)any other interested individuals; and(5)identify cost estimates for any Federal acquisition, development, interpretation, operation, and maintenance associated with the alternatives considered under paragraph (3).(c)Applicable lawThe study required under subsection (a) shall be conducted in accordance with section 100507 of title 54, United States Code.(d)ReportNot later than 3 years after the date on which funds are first made available to conduct the study required under subsection (a), the Secretary shall submit to the Committee on Energy and Natural Resources of the Senate and the Committee on Natural Resources of the House of Representatives a report containing—(1)the results of the study; and(2)any conclusions and recommendations of the Secretary.
Tracker
The tracker indicates the progress of this legislation as it moves through the legislative process.
- Introduced2025-04-29
- Passed Senate
- Passed House
- Conference
- To President
- Became Law
CRS Summary
The summaries are the Congressional Research Service’s, one per stage. Read them in full.
Introduced in Senate Apr 29, 2025
sb1516/introduced-in-senate.mdShown Here:
Introduced in Senate (04/29/2025)
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.
Sponsors
Sen. Richard Durbin (D) sponsors S. 1516, and 1 member has co-sponsored it from the day it was introduced.
Committees
S. 1516 went before 1 committee: Energy and Natural Resources.
Actions
S. 1516 has taken 5 actions since Apr 29, 2025, the latest on Jul 23, 2026.
| Chamber | Action | |||
|---|---|---|---|---|
Jul 23, 2026 | Senate | Committee on Energy and Natural Resources. Reported by Senator Lee with an amendment in the nature of a substitute. Without written report.Energy and Natural Resources Committee | ||
Jul 23, 2026 | Senate | Placed on Senate Legislative Calendar under General Orders. Calendar No. 478. | ||
Feb 4, 2026 | Senate | Committee on Energy and Natural Resources. Ordered to be reported with an amendment in the nature of a substitute favorably.Energy and Natural Resources Committee | ||
Apr 29, 2025 | Senate | Read twice and referred to the Committee on Energy and Natural Resources. (text: CR S2668)Energy and Natural Resources Committee | ||
Apr 29, 2025 | — | Introduced in Senate |
Votes
S. 1516 has not gone to a roll call.
Titles
S. 1516 goes by 4 titles, 2 of them short titles.
- Cahokia Mounds Mississippian Culture Study Act — Display Title
- Cahokia Mounds Mississippian Culture Study Act — Short Title(s) as Reported to Senate
- Cahokia Mounds Mississippian Culture Study Act — Short Title(s) as Introduced
- 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
Lobbying
1 client hired 1 firm and 4 registered lobbyists who named S. 1516 in 2 quarterly filings, 2026. Reported under the Lobbying Disclosure Act; a filing’s income covers everything its registrant worked that quarter, so the amounts below are the filings’, not this bill’s.
Filed under Budget/Appropriations, Energy/Nuclear, Natural Resources, Real Estate/Land Use/Conservation.
Clients
Who paid to be heard, by how many filings named the bill.
| Client | Business | State | Firms | Filings | Reported |
|---|---|---|---|---|---|
| NATIONAL PARKS CONSERVATION ASSOCIATION | — | District of Columbia | 1 | 2 | — |
Firms
Registrants who filed on the bill, by filings.
| Registrant | Clients | Filings | Reported |
|---|---|---|---|
| NATIONAL PARKS CONSERVATION ASSOCIATION | 1 | 2 | — |
Lobbyists
Named on the filings that cite the bill.
| Lobbyist | Firms | Clients | Filings |
|---|---|---|---|
| CHAD LORD | 1 | 1 | 2 |
| CHRISTINA HAZARD | 1 | 1 | 2 |
| EMILY DOUCE | 1 | 1 | 2 |
| JOHN GARDER | 1 | 1 | 2 |
Filings
The documents themselves, on the Senate’s Lobbying Disclosure site, largest reported first.
| Client | Registrant | Period | Reported | Document |
|---|---|---|---|---|
| NATIONAL PARKS CONSERVATION ASSOCIATION | NATIONAL PARKS CONSERVATION ASSOCIATION | 2026 first_quarter | $113.1K | 1st Quarter - Amendme… |
| NATIONAL PARKS CONSERVATION ASSOCIATION | NATIONAL PARKS CONSERVATION ASSOCIATION | 2026 first_quarter | $112.6K | 1st Quarter - Report |
Classification
The Congressional Research Service files S. 1516 under Public Lands and Natural Resources, one of its 31 policy areas, and gives it 3 legislative subjects.
CRS Subjects
CRS assigns every bill one policy area from its 31; S. 1516’s is Public Lands and Natural Resources.
s1516/policy-areas.txtLegislative Subjects
S. 1516 carries 3 of CRS’s legislative subjects, from Government studies and investigations to Illinois.
s1516/subjects.txtSource: congress.gov · legiscan.com