Omaha, Neb. ? The U.S. State Department still plans to decide sometime this year whether to allow a Canadian firm to build a pipeline carrying oil across the Plains to refineries near the Gulf of Mexico.

But the public will get another chance to weigh in on the project.

Officials said Friday that a series of meetings will be held in September in the capitols of each of the six states TransCanada’s Keystone XL pipeline would cross. Additional meetings will be held in the Nebraska Sandhills, on the Gulf Coast and in Washington D.C.

Environmental groups have raised concerns that the pipeline could foul water supplies and increase pollution.

The pipeline would carry Canadian oil across Montana, South Dakota, Nebraska, Kansas, Oklahoma and Texas. It may also connect to North Dakota oil fields.