The U.S. Fish and Wildlife Service wants to study expansion of the Hanford Reach National Monument.

The agency has informed the Department of Energy that it wants to study adding newly cleaned-up Hanford Nuclear Reservation land to the monument.

The Tri-City Herald reports that proposal concerns the Tri-City Development Council, which worries that Fish and Wildlife control of the land could mean it would remain largely off-limits to the public.

The Energy Department plans to complete most environmental cleanup of Hanford in the 220 square miles along the Columbia River by the end of 2015.