The Guam Comprehensive Flood Study represents a collaborative approach between the US Army Corps of Engineers (USACE) and the Government of Guam to understand flooding hazards across the island. The technical work done by USACE is meant to serve as the planning framework that the Government of Guam will use to work toward reducing flood risk for its communities. The purpose of the study is to provide the Government of Guam with 1) an update of the regional flood frequency analysis for southern Guam; 2) site-specific hydrologic and hydraulic analysis of two to four flood prone areas within the inventory; and 3) preliminary flood mitigation design concepts for the aforementioned sites