The purpose of this study by the San Francisco District, Corps of Engineers is to evaluate the economic, environmental and social feasibility and impact of various alternative plans for facilities on Uvas-Carnadero Creek to provide flood protection for the City of Gilroy in Santa Clara County, California. The objective of this Phase I Advanced Engineering and Design Study is to bridge the gap between the time when the proposed project was authorized and the initiation of detailed engineering and design of the project. The study determined that the following planning objectives responded to the problems, needs and opportunities identified during the planning process: (1) To provide Standard Project Flood (SPF) damage prevention for the urban areas of Gilroy; (2) To preserve the riparian habitat along Uvas-Carnadero Creek; (3) To preserve or enhance the visual character and maximize the aesthetic quality along the stream; and (4) To preserve or enhance the fish and wildlife resources in and along Uvas-Carnadero Creek.