The United States Society on Dams (USSD) is dedicated to advancing the role of dam and levee systems and building the community of practice. USSD is a world class organization of engineering professionals who are dedicated to advancing the environmentally sustainable science of planning, design, construction, operation and maintenance of dams, levees and associated civil engineering projects. ADVANCING THE KNOWLEDGE OF DAM AND LEVEE ENGINEERING, CONSTRUCTION, PLANNING, OPERATION, PERFORMANCE, REHABILITATION, DECOMMISSIONING, MAINTENANCE, SECURITY AND SAFETY; FOSTERING DAM TECHNOLOGY FOR SOCIALLY, ENVIRONMENTALLY AND FINANCIALLY SUSTAINABLE WATER RESOURCES SYSTEMS; PROVIDING PUBLIC AWARENESS OF THE ROLE OF DAMS AND LEVEES IN THE MANAGEMENT OF THE NATION'S WATER RESOURCES; ENHANCING PRACTICES TO MEET CURRENT AND FUTURE CHALLENGES ON DAMS; AND REPRESENTING THE UNITED STATES AS AN ACTIVE MEMBER OF THE INTERNATIONAL COMMISSION ON LARGE DAMS (ICOLD).