Foundations are an important part of a construction project. Foundation construction is highly variable due to the fact that a construction process faces difficult problems such as, poor soil conditions, congested traffic and unpredictable weather. Designers are often unable to obtain reliable information in order to improve the accuracy of project time estimation that often leads to more delays and disputes. Field construction data related to this research were collected from twenty-five Texas highway projects within a two-year period to develop three models that could predict production rates of drilled shafts and prestressed concrete piles more accurately. Copyright ASCE 2006.