Something new was added to the growing list of applications for site-precast concrete when the Washington State Highway Department granted limited approval to experiment with short, light precast sections of highway retaining walls. Now, two years later, nearly 500 sections up to 35 feet high the weighing over 50 tons each have been precast and are in place. This new concept could have quite an impact on future highway retaining wall construction if the present attitude of the Washington Highway Department and the interest shown by other states and the Bureau of Public Roads is any indication. A 6,000,000 dollar freeway section, bid recently in Seattle, specified a choice of forming and casting in place, or of site-precasting the retaining walls. The advantages of site-precasting are a minimum of forming and stripping and elimination of all high forming and scaffolding; an increased number of uses of face forming material, especially beneficial if a textured finish is required; placing of concrete direct form the ready mix truck without any high lifting; elimination of form ties and patching; reduction in finishing; and the ability to schedule a steady flow of production, stock-piling concrete ahead. Also, the fifth of that required to form, place, and strip. Backfilling can be started about a week after beginning to set a series of precast wall sections.