The Olympia, Roy Prairie, Tenino and Yelm pocket gophers are found only in Pierce and Thurston counties.
The Olympian reports the decision follows more than a decade of debate, environmental studies and lawsuits.
Fish and Wildlife officials also have also designated 1,600 acres in Thurston County as critical habitat for the pocket gophers. A special rule will allow farming and ranching to continue.
The critical habitat proposed for the Roy Prairie pocket gopher is on Joint Base Lewis-McChord, which has promised to preserve its prairie land.
A threatened species is likely to become endangered in the foreseeable future if steps aren't taken to protect it.