Lawmakers in Illinois want to slow down the review process for a major electricity line project by utility company Ameren.

Ameren Transmission Co. is seeking to build a 380-mile electric transmission line from Missouri to Indiana that would stretch across 19 Illinois counties.

Republican state Sen. Chapin Rose of Mahomet has introduced legislation that would slow the regulatory review process.

Rose says the project's necessity is at question, and that he has heard from constituents concerned about the new power lines.

Ameren spokesman Leigh Morris says the company opposes the measure, calling it is too restrictive.

Morris says the project is meant to improve reliability and market efficiency and to meet increasing electricity demands.