Dakota Mainstem Water Supply Project Feasibility Study Act

This bill authorizes a feasibility study to assess constructing a regional water supply project for municipal, rural, and industrial use across South Dakota, Iowa, Nebraska, and Minnesota. The study, to be conducted by the Secretary of the Interior in partnership with the Dakota Mainstem Regional Water System, must follow federal reclamation standards and is limited to a $10 million federal cost (capping at 50% of total study expenses). The study must be completed within 10 years of the bill's enactment. It directly affects communities in the four specified states that could potentially benefit from the project if the study concludes it is feasible.