The City and Borough of Juneau and Tlingit & Haida will hold sandbag distribution events on Saturday, July 19 and Saturday, July 26, from 11 a.m. to 3 p.m. at the Dimond Park Field House parking lot in preparation for another glacial outburst flood.
With the summer heat rising and water levels climbing in Suicide Basin, emergency officials, city officials and the National Weather Service are closely monitoring the threat of another glacial lake outburst flood (GLOF) in the Mendenhall River Valley. This threat follows a record flood event on August 6, 2024, which swept through neighborhoods, damaged property, and reshaped how Juneau prepares for these recurring flooding events.
Suicide Basin, located above the Mendenhall Glacier, has released floodwaters nearly every year since 2011. These events occur when meltwater trapped behind the glacier breaks through ice dams, sending torrents into Mendenhall Lake and River below.
As of Saturday, July 12, water levels in the basin are around 1,263 feet, about 108 feet below the spillway level. That’s slightly lower than this time last year, due to a colder spring and early summer.
At the current rate, or around 4 feet per day, the basin could reach full capacity by August 8.
Sand, bags, and shovels will be available for residents to fill on site. Households in the 18-foot flood risk zone may collect up to 75 sandbags total, including from earlier events.
For flood prep info, visit juneauflood.com or bit.ly/JuneauFloodReady, and sign up for alerts at bit.ly/CBJAlerts.