Business Directory Black River Fallsblack River FallsAC Builders & Supply is a family owned and operated lumber yard located only 9 miles north of Black River Falls in the heart of Alma Center. When building, remodeling, or doing home repairs, make sure it will endure. We offer reputable, building products, at the most reasonable prices possible. At AC Builders & Supply we will be happy to help you get the best suited for the you have in mind. Currently serving Jackson County and the surrounding communities with our friendly small hometown service.