Granite Construction, incorporated in 1922, is a publicly traded company that builds roads, tunnels, bridges, airports and other infrastructure-related projects. It also produces and supplies sand, gravel, ready-mix and asphalt concrete and related construction materials. The company is one of the United States leading general contractors and operates through two divisions, Granite East and Granite West. It operates Granite Construction Company, which provides civil construction services to private companies and homeowners. It provides excavation, mining, grading, paving, and design and build services. It also offers sieve analysis, sand equivalency, sodium sulfate soundness, specific gravity, moisture density relationship and visual deleterious material testing services, as well as maintains online material calculators.