Suction caissons are closed-top open-bottom tubes that act as anchors in the deep ocean. They are installed by allowing them to penetrate the bottom soils under dead weight and then pumping out entrapped water to develop a sufficient pressure differential on the top plate to cause penetration. They have proved to be an efficient and economic alternative to driven piles. This project was concerned with experimental measurements of the behavior of laboratory-scale suction caissons in normally consolidated clay. The purposes were to develop a better understanding of the capacity of suction caissons, and to provide data to be used in the development of analytical models.