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An image of the cover of the Cahokia Mounds Reconnaissance Survey, dated December 2016. On the cover is an aerial image of Monks Mound, the largest earthen mound in North America, covered in grass in the morning sunlight. The stairs and path to the top of the mound are visible. In the foreground, a small part of Colinsville Road is visible, and behind the mound, beyond a stand of trees, Interstate 55/70 is visible.

Cahokia Mounds Reconnaissance Survey

Midwest Regional Office » Cahokia Mounds Reconnaissance Survey » Document List

Dear Readers,

This reconnaissance survey is a preliminary resource assessment of the Cahokia Mounds State Historic Site and associated Mississippian mound groups in the St. Louis metropolitan area of Illinois and Missouri. The conclusions are not final or definitive - the survey provides a cursory review and analysis of available information to determine whether a special resource study is warranted. The survey was undertaken in response to a letter from Senator Richard Durbin in February 2014. The completed study was transmitted on July 25, 2019.

A reconnaissance survey typically examines the issues of national significance, suitability, feasibility, and level of National Park Service (NPS) management required, and determines whether further evaluation through a congressionally authorized special resource study should be considered. The NPS concluded that additional study is warranted and recommended that Congress consider authorizing a special resource study to further evaluate the site for inclusion in the National Park System; invite public involvement in the study process; and develop potential management alternatives for Cahokia Mounds State Historic Site, Emerald Mounds, and Pulcher Mounds. The NPS finds that other outlying mounds are unlikely to meet the criteria for inclusion in the National Park System and they are not recommended for further study.

The Cahokia Mounds reconnaissance survey was drafted in December 2016, as reflected on its cover sheet. Because of the time that has elapsed while preparing the report for transmittal, certain elements of the survey may no longer reflect the current conditions of the resources. While we regret any outdated information in the survey, the legislated expense limit of $25,000 for reconnaissance surveys precludes the NPS from conducting a substantive update.

Please see "Document List" on the left sidebar to read the completed survey.

Thank you for your interest in the Cahokia Mounds Reconnaissance Survey.

Contact Information
Tokey Boswell
(402) 661-1534