ST. LOUIS (AP) — Developers announced plans Monday to expand the capacity of a controversial wind power transmission line so much that it would match that of four new nuclear power plants.

The St. Louis Post-Dispatch reports that Invenergy Transmission, the Chicago-based company attempting to build the Grain Belt Express, now says the project will be able to deliver 5,000 megawatts of power, about 25% more than originally planned.

Invenergy said that investment in the project also would soar to about $7 billion.