(MCT) — The federal government cleared the way Thursday for waters off the Northern California coast to become the first marine wilderness in the continental United States, ending a contentious political battle that pitted a powerful U.S. senator against the National Park Service.

Interior Secretary Ken Salazar settled the dispute by refusing to extend a permit for a commercial oyster farm operating in Point Reyes National Seashore. Congress designated the area as potential wilderness in 1976 but put that on hold until the farm’s 40-year federal permit ended.