Why It Matters
South Dakota’s access to reliable rural water infrastructure directly affects economic development and population retention across the state’s agricultural and small-town regions. The Senate committee’s approval of a feasibility study for expanding the Lewis & Clark Rural Water System marks the first step toward potentially securing federal funding for infrastructure that could serve tens of thousands of residents across three states.
What Happened
The Senate Committee on Energy and Natural Resources advanced the Lewis & Clark Regional Water System Expansion Feasibility Study Act, sending it to the full Senate for consideration. The bill, sponsored by Sen. John Thune (R-South Dakota) with cosponsor Sen. Mike Rounds (R-South Dakota), would authorize $10 million in federal funding through the Department of the Interior to assess the feasibility of expanding the Lewis & Clark system’s capacity and geographic reach.
The Lewis & Clark Rural Water System currently operates across southeast South Dakota, northwest Iowa, and southwest Minnesota, serving 20 member cities and rural water systems. The feasibility study would examine how the system could be expanded to reach additional communities in the tri-state region.
This legislative action follows Senate committee approval last month of two related bills aimed at addressing water infrastructure gaps across South Dakota. Both the Western Dakota Regional Water System and Dakota Mainstem Regional Water System bills also secured committee approval and similar funding levels.
Sen. Mike Rounds stated that “continued access to clean and reliable water is critical to economic development and quality of life in our state,” underscoring the rationale behind the proposal.
By the Numbers
$10 million — funding authorized for Lewis & Clark feasibility study through the Department of Interior
$10 million — funding level for Western Dakota Regional Water System study
$10 million — funding level for Dakota Mainstem Regional Water System study
20 — member cities and rural water systems currently served by Lewis & Clark system
Zoom Out
Water infrastructure investment has emerged as a bipartisan priority in Congress, with rural communities across the Great Plains and Upper Midwest seeking federal support for pipeline systems and treatment facilities. South Dakota’s multi-pronged approach—advancing three separate regional water system bills simultaneously—reflects broader efforts to address chronic water supply challenges in areas where population density makes private investment difficult to justify.
The Western Dakota Regional Water System would construct a pipeline corridor from the Missouri River to serve western South Dakota communities, while the Dakota Mainstem system targets eastern South Dakota, western Minnesota, and northern Iowa. Together, the three proposals represent a comprehensive strategy to expand access across the state’s diverse regions.
What’s Next
The Lewis & Clark bill now moves to the full Senate for floor consideration. House versions of all three regional water system bills, introduced by Rep. Dusty Johnson (R-South Dakota), remain pending committee action in that chamber. The House committee process will determine whether the bills advance toward a floor vote and potential reconciliation with Senate-passed language.