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Flash Flood — Koyukuk / Upr Kobuk Vly, AK

Jul 17, 1999

Frequent rains over the Brooks Range produced rises to bankfull on many rivers draining north toward the Arctic Ocean, as a few rivers Draining on the south side. The Dalton Highway was reported washed out at the Holden Creek Bridge near milepost 363, as well as a washout at milepost 260 between Atigun Pass and Galbraith Lake. Rainfall amountsAnaktuvuk Pass AWOS: 1 inchBLM/NPS Remote Automated Weather System sites:MUY 2.4 inchesAGN 1.5 inchesCXF 2.20 inches

Source: NOAA National Weather Service Storm Events Database (event 5710030). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Koyukuk / Upr Kobuk Vly, AK

This event is one of many recorded floods in Koyukuk / Upr Kobuk Vly County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Koyukuk / Upr Kobuk Vly County flood data →

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