Grace Center in Corvallis - Adult Day Services Grace Center Adult Day Services Upcoming Events About Grace Center Grace Center for Adult Day Services is a specialized health and social adult day center in Corvallis Oregon. The only certified adult day center in Linn Benton and Polk counties Grace Center is a unique and needed service for the tricounty community it serves. Grace Center is a nonprofit organization with a mission to provide day services that optimize the cognitive and physical abilities of older adults and adults with a disability so they can remain as independent as possible and in their homes. The center specializes in both memory care and postrehabilitation serving adults with dementia those recovering from strokes or brain injuries and others.