Interim Risk Reduction Measures for Dam Safety

Interim Risk Reduction Measures (IRRM) are an integral part of the risk-informed management of the Dam Safety Program of the U.S. Army Corps of Engineers (USACE). IRRM are an "in-the-meantime plan" for dam operations to reduce the probability and consequences of catastrophic failure to the maximum extent reasonably practical while inspections, investigations, testing, and studies take place, which could ultimately determine whether or not the project is a candidate for significant repairs. This paper provides a general overview of IRRM from USACE's EC 1110-2-6064 and the author's experience with development, implementation, and review of IRRM Plans. 11 pp., 9 references.