Angeles and Clearlake-backed American Construction Source, a provider of lumber and building materials, agreed to acquire Foley Lumber and Milaca Building Center, two providers of lumber and building materials. Financial terms were not disclosed. "The ACS team welcomes Foley and Milaca to our national platform of service-oriented lumber and building materials locations. The Kotsmith family has built a great business over generations, and we respect the customer relationships they have fostered for the last 90 years," James Drexinger, ACS CEO.