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Hydrograph River at a Glance Download
Eyak Lake near Cordova Stage (ft)Observed: 15.99 ft at 3:11PM Mar 16, 2023Observed: 16.03 ft at 9:36PM Mar 16, 2023Observed: 16.06 ft at 4:46AM Mar 17, 2023Observed: 16.17 ft at 9:08AM Mar 17, 2023Observed: 16.42 ft at 3:05PM Mar 17, 2023Observed: 16.47 ft at 9:04PM Mar 17, 2023Observed: 16.46 ft at 3:04AM Mar 18, 2023Observed: 16.43 ft at 9:02AM Mar 18, 2023Observed: 16.54 ft at 3:26PM Mar 18, 2023Observed: 16.75 ft at 9:24PM Mar 18, 2023Observed: 16.75 ft at 2:58AM Mar 19, 2023Highest Observation: 16.77 ft at 8:56AM Mar 19, 2023Observed: 16.71 ft at 2:55PM Mar 19, 2023Observed: 16.74 ft at 8:54PM Mar 19, 2023Observed: 16.72 ft at 2:53AM Mar 20, 2023Observed: 16.68 ft at 8:50AM Mar 20, 2023Observed: 16.63 ft at 2:50PM Mar 20, 2023Observed: 16.64 ft at 8:48PM Mar 20, 2023Observed: 16.64 ft at 2:47AM Mar 21, 2023Observed: 16.58 ft at 9:09AM Mar 21, 2023Observed: 16.55 ft at 2:44PM Mar 21, 2023Observed: 16.57 ft at 9:05PM Mar 21, 2023Observed: 16.61 ft at 4:15AM Mar 22, 2023Observed: 16.6 ft at 9:38AM Mar 22, 2023Observed: 16.54 ft at 3:01PM Mar 22, 2023Observed: 16.63 ft at 8:59PM Mar 22, 2023Observed: 16.63 ft at 3:35AM Mar 23, 2023Observed: 16.61 ft at 9:32AM Mar 23, 2023EYAA2(plotting HGIRZ) Graph Created (11:47AM Mar 23, 2023)ObservedLatest observed value: 16.61 ft at 9:32 AM AKDT 23-Mar-2023. Flood Stage is 24.5 ft
About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Stage data may not be available during winter months.

NOTE: Forecasts are not available for the Eyak Lake near Cordova. Only observed stages are available for this point.

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Downstream Gauge Downstream Gauge - at Copper River Highway
Flood Categories (in feet)
Major Flood Stage: 7
Moderate Flood Stage: 5
Flood Stage: 4
Action Stage: 3.5
Low Stage (in feet): -9999

Historic Crests
(1) 8.62 ft on 10/10/2006
(2) 7.64 ft on 08/07/1981
(3) 7.22 ft on 08/21/2006
(4) 5.44 ft on 09/14/2014 (P)
(5) 5.22 ft on 09/17/2012
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(P): Preliminary values subject to further review.

Recent Crests
(1) 2.55 ft on 08/28/2021 (P)
(2) 4.60 ft on 08/30/2017 (P)
(3) 3.97 ft on 08/08/2016 (P)
(4) 3.72 ft on 09/30/2015 (P)
(5) 5.44 ft on 09/14/2014 (P)
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(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to

Zoom Level:14
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Gauge LocationGauge Map Marker
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.
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If you notice any errors in the below information, please contact our Webmaster
5 Observations made on September 14, 2014 suggest that Lake Stage at this level and above will result in water overflowing Power Creek Road. Rainfall events that cause rises of Eyak Lake to this level and above can likely occur in the Sheridan River and Salmon Creek basins located at miles 14 and 23, respectively, on the Copper River Highway with water overflowing these sections of the highway.
(1) Staff gage #1
(2) Staff gage #2
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Latitude: 60.551389° N, Longitude: 145.691389° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 4 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 Not Available Not Available  
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Long-term Hydrograph
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Anchorage Weather Forecast Office
6930 Sand Lake Road
Anchorage, AK 99502
(907) 266-5160
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