Lewis and Clark Regional Water System Expansion Feasibility Study Act

This bill directs the Secretary of the Interior to conduct a feasibility study for expanding the Lewis and Clark Regional Water System to provide municipal, rural, and industrial water service across Iowa, Minnesota, and South Dakota. The study, to be developed with the local water system organization (Lewis and Clark Regional Water System, Inc.), will assess project viability and recommend whether construction should proceed and determine the local cost-sharing share (minimum 25% of total costs). Federal funding for the study is capped at 50% of costs, with $10 million authorized and a 10-year deadline for completion. The resulting report must be submitted to Congress and made public, but the bill does not authorize construction itself.