Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.

Weather Forecast Office Anchorage, AK

Alaska Pacific River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (AKDT) Datum: Not Available Metadata

NOTE: Gage data do not meet the quality standards of USGS gages. NOTE: Forecasts are not available for the Eyak River at Copper River Highway. Only observed stages are available for this point.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 0 Moderate Flood Stage: 25.5 Flood Stage: 24.5 Action Stage: 23.5 Low Stage (in feet): -9999 Historic Crests (1) 28.07 ft on 10/10/2006 (2) 25.95 ft on 08/20/2006 (3) 25.05 ft on 09/17/2012 (4) 24.27 ft on 08/30/2017 (P) (5) 24.08 ft on 09/14/2014 (P) Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 21.90 ft on 08/28/2021 (2) 24.27 ft on 08/30/2017 (P) (3) 23.91 ft on 08/08/2016 (P) (4) 23.92 ft on 09/29/2015 (P) (5) 24.08 ft on 09/14/2014 (P) Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:11 Legend FEMA Layer Gauge Location Disclaimer Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
25.7	Approximate gage height of 2015 FEMA 1% annual exceedance probability (100 yr) flood
25.5	Moderate Flood Stage. Water surrounding homes along Eyak River, necessitating taking boats to homes. Septic fields flooded. All of Cordova's Municipal Airport runway underwater. With any wind/wave action, Power Creek Road is flooded and eroded.
24.5	Flood stage. Water in residences's yards, garages, crawl spaces and basements. Most of weir near the Eyak Lake outlet underwater. Standing water on parts of Cordova's Municipal Airport runway. Washouts can be a serious problem near the Sheridan River where the bridge span is to short to carry the flow on a braded system.
23.5	Action stage. Closer monitoring of water levels draining the Gulf of Alaska.
22.5	Bankfull.
Photos (1) Eyak Bridge near minor flood stage 24.5 (2) Eyak Bridge downstream view near flood stage 24.5 (3) Upstream stage 24.52ft

About This Location

Latitude: 60.531111° N, Longitude: 145.644444° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 24.5 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other NULL NULL

Additional Information

Long-term Hydrograph

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Alaska-Pacific River Forecast Center Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Search River Notes Nat'l Snow Information Alaska Snow Maps Flood Stage Definitions

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