Environmental group raises questions about possible open meetings law violations in advance of the vote.
The belt is predicted to stretch across a quarter of the country by 2053.
Some solar advocates told the council it should instead consider a moratorium on petrochemical projects.
The suit is part of a broader effort to stop the construction of the large grain terminal.
Greenfield Louisiana inked a deal that allows it to pay a flat fee in lieu of taxes for decades.
Officials said at a recent event that ships would be landing within weeks. But no one has applied for permits to build a dock.
Though significantly smaller than expected, this year's dead zone still far exceeds the long-term goal.
The Crow runs into the Mississippi, bringing a share of the pollution driving the large and growing oxygen-depleted 'dead zone' in the Gulf of Mexico.
Mississippi River watershed communities like Bay City, Wisconsin are feeling the effects of environmental degradation. Advocates hope a proposed federal funding program, based on a successful initiative in the Great Lakes, could change this.
The resolution, which the company has agreed to, now goes to the full council for final approval.