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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 NPS 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 NPS expects to release the draft study for public review in Summer 2016.
* 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