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Hydrograph River at a Glance Download
Eyak Lake near Cordova Stage (ft)Observed: 0.47 ft at 8:00AM Apr 29, 2021Highest Observation: 0.56 ft at 8:00AM May 05, 2021EYLA2(plotting HGIRZ) Graph Created (10:17PM May 5, 2021)ObservedLatest observed value: 0.56 ft at 8:00 AM AKDT 5-May-2021. Flood Stage is 4 ft
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Tabular Data (UTC)
Tabular Data (AKDT)
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Datum: Not Available
NOTE: Stage measured manually and reported by river observer. No automated gauge on-site.

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 Bridge
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) 4.60 ft on 08/30/2017 (P)
(2) 3.97 ft on 08/08/2016 (P)
(3) 3.72 ft on 09/30/2015 (P)
(4) 5.44 ft on 09/14/2014 (P)
(5) 4.36 ft on 09/07/2013 (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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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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Page last modified: 2-Nov-2020 7:26 PM
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