A planned $5.5 billion, 688-mile CO2 transport pipeline moved one step closer to construction on June 25 following the Iowa Utilities Board’s approval for the segment that would pass through the state.

Summit Carbon Solutions plans to use the line to transport CO2 from ethanol plants in the upper Midwest to North Dakota for underground storage. The pipeline would cross into Iowa, Minnesota, Nebraska, South Dakota and North Dakota. Iowa is the first state to give Summit permission to build.

The project has raised eminent domain issues for many residents along the proposed route. The Associated Press reported on June 24 that the issue has North Dakota Gov. Doug Burgum facing intense criticism.

“The momentum will continue as we prepare to file our South Dakota permit application in early July,” Summit CEO Lee Blank said in a press release. “We look forward to engaging with the state throughout this process and are confident in a successful outcome.”

Summit is partnering with 57 ethanol plants for the project and has signed easement agreements with 75% of the landowners along the proposed route, according to the release.