Lewis & Clark Regional Water System Expansion Feasibility Study Act

This bill authorizes a feasibility study to assess expanding the Lewis & Clark Regional Water System, which serves communities in Iowa, Minnesota, and South Dakota. The Secretary of the Interior must coordinate with the water system's nonprofit operator to evaluate the project's viability, including cost-sharing (requiring at least 25% non-Federal contribution for construction) and financial feasibility. The study will produce a report for Congress and the public, with the federal government covering up to 50% of the study costs ($10 million authorized). The bill does not fund construction but sets the process for determining whether expansion should proceed. The study authorization expires 10 years after enactment.