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119-s-3736119th CongressWALLET

Dakota Mainstem Water Supply Project Feasibility Study Act

Sponsored By: Senator Rounds, Mike [R-SD]

In Committee

Summary

The bill directs the Interior Department to complete a detailed feasibility study of the proposed Dakota Mainstem Water Supply Project to decide whether a regional municipal, rural, and industrial water system should be built.

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  • Residents in parts of South Dakota, Iowa, Nebraska, and Minnesota could gain a new municipal and rural water source if the study recommends construction.
  • The Dakota Mainstem Regional Water System, Inc. must coordinate with the Secretary and, if built, cover at least 25% of construction costs.
  • Federal support for the study is capped at $10.0 million and no more than 50% of study costs. The Secretary must produce a public feasibility report, consult federal, state, Tribal, regional, and local authorities, and the authority to carry out the study ends five years after enactment.

*This would increase federal spending by up to $10.0 million for the feasibility study, with the Federal share limited to 50% and funded by appropriations.*

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Bill Overview

Analyzed Economic Effects

1 provisions identified: 1 benefits, 0 costs, 0 mixed.

Study for Dakota regional water supply

If enacted, the Secretary of the Interior would carry out a feasibility study of the Dakota Mainstem Water Supply Project. The study would be done with the non‑Federal Dakota Mainstem Regional Water System, Inc., and follow reclamation laws and standards. Federal funding for the study would be limited to 50 percent of study costs and to no more than $10 million total. The Secretary would identify sources for the Federal share within 90 days of enactment and enter into a cost‑sharing or financial assistance agreement. The study would produce a public report on technical and financial feasibility, whether to authorize construction, and recommend the non‑Federal construction share (at least 25 percent). Authority to carry out the study would expire five years after enactment.

Sponsors & CoSponsors

Sponsor

Rounds, Mike [R-SD]

SD • R

Cosponsors

  • Sen. Thune, John [R-SD]

    SD • R

    Sponsored 1/29/2026

Roll Call Votes

No roll call votes available for this bill.

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