Auger cast piles were employed to support major equipment additions under three separate projects during 2005 and 2006 at one electric generation plant in south Alabama. Due to the subsurface profile variations within the plant and differing foundation loading, various lengths of auger cast piles were installed. Axial load tests, lateral load tests and pile integrity testing were used on some of the projects. Several problems during construction required modifications to installation methods, including a change in foundation type mid-project on one of the additions. Predicted and measured capacities for both axial compression and lateral capacity are compared, along with a discussion on the various problems encountered during construction. The paper also stresses how historical information regarding existing facilities plays an important role in the selection and performance of foundation types.
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