context of earth dams, noting that they are some of the oldest types of dams known. It highlights the necessity for specialized knowledge in constructing these structures, countering the common misconception that it is a simple task. Bassell outlines the significance of detailed preliminary investigations, site selection, and material suitability, suggesting that a deep understanding of hydraulic principles is crucial to prevent failures, such as the catastrophic Johnstown Disaster. Through this initial discourse, the reader is drawn into the meticulous world of engineering practices surrounding earth dams, laying the groundwork for more in-depth discussions in the chapters to follow. (This is an automatically generated summary.)