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"those were designed to the same capacity to which the HESCO barriers are built, so 63,500. Also, as a function of creating the maps, we also overlaid, we took a no HESCO model, and so what would be inundated without the HESCOs. We also looked at several different breach points and tried to identify where the worst or most impactful breach locations would be and overlaid those things so that we made sure that we encompassed any area that could be impacted."

those were designed to the same capacity to which the HESCO barriers are built, so 63,500. Also, as a function of creating the maps, we also overlaid, we took a no HESCO model, and so what would be inundated without the HESCOs. We also looked at several different breach points and tried to identify where the worst or most impactful breach locations would be and overlaid those things so that we made sure that we encompassed any area that could be impacted.
Community
Alaska News
Location
Juneau
Captured at
July 9, 2026

From the transcript

So while we're mapping and working in models, we use the cubic feet per second. And so those were designed to the same capacity to which the HESCO barriers are built, so 63,500. Also, as a function of creating the maps, we also overlaid, we took a no HESCO model, and so what would be inundated without the HESCOs. We also looked at several different breach points and tried to identify where the worst or most impactful breach locations would be and overlaid those things so that we made sure that we encompassed any area that could be impacted. Again, we broadened our criteria for inclusion in the evacuation advisory based on access and transportation and how folks or first responders may be able to engage.

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Cover image for article: Nearly 1,900 Juneau homes are under an evacuation advisory as a glacial flood nears