In 1985, The American Society of Civil Engineers published new information coming from an extensive program carried on for the Seabrook Nuclear Power Station in New Hampshire, in an effort to increase the blast-vibration limits for freshly placed or green concrete. The test program conducted in both the laboratory and the field covered a wide range of combinations of vibration intensity and concrete age and location in the structure. It resulted in significantly raising some of the previously used vibration limits while still providing conservative margins to meet design requirements.