Want to study the Missouri River? Soon, you may need unanimous approval from 10 states

Legislation would require 10 governors’ permission to study or build projects moving water outside the basin.

3 minute read

October 30, 2026, 7:00 AM PDT

By Joshua Haiar


 A bridge stretches across the Missouri River at Chamberlain, South Dakota.

A bridge stretches across the Missouri River at Chamberlain, South Dakota, on Sept. 29, 2026. | Makenzie Huber/South Dakota Searchlight

This story was originally published by South Dakota Searchlight, which provides free news and commentary on critical issues facing the state.

Downstream Missouri River states have worried for decades about receiving an insufficient flow of water from upstream dams.

Now they’re worried their share of water could be further diminished by potential pipelines for dry Western states.

The concern is the basis of a dispute about the U.S. House version of the federal Water Resources Development Act. A provision in the bill would require approval from all governors in Missouri River states to study or construct a project that moves water from the river or its tributaries to a non-Missouri River state.

The bill has passed the House and awaits action in the Senate, where a Senate version of the legislation lacks the controversial provision.

Missouri lawmaker and group support provision

The House bill’s definition of “Missouri River states” includes not only the seven states where the river flows — Montana, North Dakota, South Dakota, Nebraska, Iowa, Kansas and Missouri — but also Colorado, Minnesota and Wyoming, which have land within the river’s 530,000-square-mile drainage basin.

A downstream lawmaker, U.S. Rep. Sam Graves, R-Missouri, sponsors the House bill. Supporters of the controversial provision include an organization in his state, the Coalition to Protect the Missouri River.

Shane Kinne is the coalition’s executive director. He said Missourians’ concerns about water shortages are not hypothetical. For the last four years, the U.S. Army Corps of Engineers has limited water releases from upper Missouri River reservoirs, affecting commercial barge traffic downstream.

Kinne said Missouri River Basin states should collaborate “so we can manage the resource together and protect ourselves from Western states looking for water.”

“If this isn’t the proposal, let’s bring some ideas to address this concern,” he said.

Joint opposition: Dakotas, Montana, Wyoming, Colorado, Utah

Kinne’s view faces opposition in upstream states.

The governors of Montana, North Dakota and South Dakota — where the Missouri River flows through a series of dams and reservoirs — recently joined with governors in the Missouri River Basin states of Colorado and Wyoming on a letter opposing the House provision.

Also signing the letter was the governor of Utah, which is not part of the Missouri River Basin. Utah relies on the Colorado River for some of its water, and the state’s Great Salt Lake Commission has mentioned the Missouri River as a potential source of imported water for the vanishing Great Salt Lake.

The governors’ letter says the House provision would give each governor in the 10 Missouri River Basin states “absolute veto power” to stop other states from even “studying the feasibility of projects in a watershed that encompasses one-sixth of the continental United States.”

When the House approved its bill by a vote of 415-9, U.S. Rep. Dusty Johnson, R-South Dakota, was among the nine votes against the legislation, along with representatives from states including North Dakota, Wyoming and Montana. Johnson said the Missouri River provision would hamstring the Army Corps of Engineers’ management of dams and reservoirs.

“Why should the Corps need unanimous approval of the governors to study a project that provides water across state lines?” Johnson said in a statement to South Dakota Searchlight.

Upstream officials worry about implications

Some South Dakota water officials also oppose the House provision.

Jay Gilbertson manages the East Dakota Water Development District, based in Brookings. He acknowledges the bill language would not impede several currently proposed Missouri River pipeline projects in South Dakota, because they would not transport water outside the Missouri River states mentioned in the bill. But he worries “it’s the start of a process that’s going to limit our ability to do things in the future.”

Gilbertson said the provision’s language requiring approval from all 10 governors is bad policy.

“You can’t get 10 states to agree on anything,” he said.

Darrell Raschke views it the same way. He serves on the boards of the Mid-Dakota Rural Water System and the Upper Missouri Water Association.

“One governor says no, you just shot the whole project down,” Raschke said. “Why would you put that in law?”

Wednesday, October 28, 2026 in South Dakota Searchlight

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