Matson Development Co. of Kennewick constructed an 80,700-square-foot self-storage facility with 642 units in 10 buildings at 9501 W. 10th Ave. in western Kennewick. The project includes an 800-square-foot leasing office.Everett-based West Coast Self-Storage is managing the business on behalf of Matson Storage LLC, a holding of the Tri-City construction...