During the week of August 11, the Mendenhall Glacier released its yearly glacier lake outburst flood, also known as a jökulhlaup (Yah-cuh-laup). In preparation for the potential threat to infrastructure and public safety, the U.S. Army Corps of Engineers provided temporary flood mitigation barriers to the City and Borough of Juneau last winter. While USACE continues to prepare a technical study that will help to define the parameters of an enduring flood risk mitigation solution, these barriers provided vital short-term protection to the community along the river this week by holding back the glacial water released from Suicide Basin and performing well during the peak of the floodwaters.