I haven't checked the database listings, however, the Linn/Benton 700 sites are actually a part of the Lane County system so that's not too unexpected. Do the numbers correspond properly to the Eugene 450 system?
(It's the "Southwest 7 County Interoperable Public Safety Radio Partnership," and includes Benton, Coos, Curry, Douglas, Josephine, Lane and Linn counties; the Oregon 4th Congressional district. It is managed through ODOT.)
Joseph Stein, KD7MLG
RadioReference Database Administrator for Oregon and Washington State