The International Commission on Large Dams (ICOLD) was founded in 1928 and has National Committees from more than 100 countries with approximately 10,000 individual members. USSD serves as the official US National Committee of ICOLD. This means your USSD membership not only gives you access to the numerous resources of USSD, but it also gives you access to vast international resources offered by ICOLD.

Visit the ICOLD Member Section to view the latest Circulars. Circular 1999 provides information on upcoming important dates and Circular 2000 outlines the process for submitting Congress Questions for ICOLD 2023.