Signs urging drivers to “Block RICL” are popping up in northern Bureau and LaSalle counties.

The signs are part of an effort to block the proposed Rock Island Clean Line (RICL) energy transmission project.

Clean Line Energy Partners, based in Houston, Texas, is looking at possible routes to carry electricity produced from wind farms in South Dakota, Nebraska, Minnesota and Iowa though Illinois and eastward. The overhead transmission line would be about 550 miles long and carry up to 3,500 megawatts of electric power.