The purpose of this report is to document the results of the first phase of additional geotechnical investigations of the piping failure of Anita Dam. This program is part of a cooperative effort by personnel from the Bureau of Land Management (BLM), Bureau of Reclamation (Reclamation), and the State of Montana to determine the cause of the dam failure and conclude if the structure can be safely and economically reconstructed. This portion of the post-failure explorations was the first of two phases of additional investigations recommended by the Board of Inquiry convened to investigate the failure. It included a comprehensive site inspection, in situ testing, test pitting, and extensive laboratory analysis of embankment and borrow area materials. Goals were to help determine the initial route or routes of failure through which the piping progressed, and evaluate the embankment and borrow area materials to determine if their characteristics were wither factors in developing the piping path or in accelerating the rate of erosion.--Page 1.