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The National Park Service is conducting a study of the eastern sites and route segments related to the preparation and return phases of the Lewis and Clark expedition. The purpose of this study is to determine the eligibility of adding these sites and segments to the existing Trail.

The study will consider various methods and means for the protection and interpretation of these sites and/or segments by the National Park Service, other federal, state and local government entities, private land owners and other organizations. As this study progresses, the National Park Service wants to know more about what the public envisions for this possible Trail extension and what opportunities exist for Trail partnerships.

The current designated trail covers about 3,700 miles and runs through 11 states. Congress directed a study to determine feasibility of extending the existing trail to include the "Eastern Legacy" sites and route segments associated with Lewis and Clark's preparation and return on their historic expedition.

The study area includes portions of the Mississippi River and the Ohio River, as well as multiple sites and overland routes totally approximately 7,400 miles and passing through 14 states and the District of Columbia.

The study document was released to the public with a request for comments from individuals, groups, states, tribes, and other federal agencies from August 15 - September 30, 2016. Correspondence from approximately 323 individuals, organizations, and agencies was received and documented. All correspondence is posted in the Responses Received on the Lewis & Clark National Historic Trail Study. The National Park Service is working to finalize the study document and transmit it to Congress.
* indicates the current step in the planning process
Step 1. Preliminary Project Set Up
Step 2. Public Scoping
Step 3. Prepare Preliminary Suitability and Feasibility Assessment
Step 4. Develop Alternatives
Step 5. Draft Report/Prepare Determination
Step 6. Public Review of Draft Study
Step 7. Publish Final Report/Transmittal to Congress *