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Hydrograph River at a Glance Download
Eyak River at Bridge Stage (ft)Observed: 16.22 ft at 4:07PM Apr 06, 2021Observed: 16.25 ft at 5:07PM Apr 06, 2021Observed: 16.24 ft at 6:07PM Apr 06, 2021Observed: 16.27 ft at 7:07PM Apr 06, 2021Observed: 16.27 ft at 8:08PM Apr 06, 2021Observed: 16.27 ft at 9:15PM Apr 06, 2021Observed: 16.25 ft at 10:07PM Apr 06, 2021Observed: 16.26 ft at 11:07PM Apr 06, 2021Observed: 16.26 ft at 12:21AM Apr 07, 2021Observed: 16.26 ft at 1:07AM Apr 07, 2021Observed: 16.3 ft at 2:08AM Apr 07, 2021Observed: 16.26 ft at 3:21AM Apr 07, 2021Observed: 16.27 ft at 4:14AM Apr 07, 2021Observed: 16.29 ft at 5:08AM Apr 07, 2021Observed: 16.28 ft at 6:07AM Apr 07, 2021Observed: 16.28 ft at 7:21AM Apr 07, 2021Observed: 16.26 ft at 8:28AM Apr 07, 2021Observed: 16.27 ft at 9:07AM Apr 07, 2021Observed: 16.27 ft at 10:07AM Apr 07, 2021Observed: 16.18 ft at 11:08AM Apr 07, 2021Observed: 16.25 ft at 12:35PM Apr 07, 2021Observed: 16.24 ft at 2:07PM Apr 07, 2021Observed: 16.24 ft at 3:07PM Apr 07, 2021Observed: 16.24 ft at 4:21PM Apr 07, 2021Observed: 16.25 ft at 5:08PM Apr 07, 2021Observed: 16.26 ft at 6:14PM Apr 07, 2021Observed: 16.25 ft at 7:15PM Apr 07, 2021Observed: 16.26 ft at 8:07PM Apr 07, 2021Observed: 16.27 ft at 9:35PM Apr 07, 2021Observed: 16.27 ft at 10:14PM Apr 07, 2021Observed: 16.26 ft at 11:07PM Apr 07, 2021Observed: 16.27 ft at 12:08AM Apr 08, 2021Observed: 16.28 ft at 1:28AM Apr 08, 2021Observed: 16.27 ft at 2:14AM Apr 08, 2021Observed: 16.27 ft at 3:07AM Apr 08, 2021Observed: 16.27 ft at 4:14AM Apr 08, 2021Observed: 16.24 ft at 5:21AM Apr 08, 2021Observed: 16.26 ft at 6:07AM Apr 08, 2021Observed: 16.27 ft at 7:07AM Apr 08, 2021Observed: 16.27 ft at 8:07AM Apr 08, 2021Observed: 16.24 ft at 9:07AM Apr 08, 2021Observed: 16.22 ft at 10:07AM Apr 08, 2021Observed: 16.2 ft at 11:14AM Apr 08, 2021Observed: 16.2 ft at 12:14PM Apr 08, 2021Observed: 16.19 ft at 2:15PM Apr 08, 2021Observed: 16.18 ft at 3:07PM Apr 08, 2021Observed: 16.2 ft at 4:14PM Apr 08, 2021Observed: 16.24 ft at 5:09PM Apr 08, 2021Observed: 16.2 ft at 6:07PM Apr 08, 2021Observed: 16.2 ft at 7:07PM Apr 08, 2021Observed: 16.22 ft at 8:21PM Apr 08, 2021Observed: 16.2 ft at 9:07PM Apr 08, 2021Observed: 16.19 ft at 10:08PM Apr 08, 2021Observed: 16.19 ft at 11:14PM Apr 08, 2021Observed: 16.2 ft at 12:07AM Apr 09, 2021Observed: 16.2 ft at 1:08AM Apr 09, 2021Observed: 16.19 ft at 2:07AM Apr 09, 2021Observed: 16.22 ft at 3:08AM Apr 09, 2021Observed: 16.2 ft at 5:07AM Apr 09, 2021Observed: 16.22 ft at 6:07AM Apr 09, 2021Observed: 16.24 ft at 7:07AM Apr 09, 2021Observed: 16.32 ft at 8:07AM Apr 09, 2021Observed: 16.44 ft at 9:14AM Apr 09, 2021Observed: 16.57 ft at 10:14AM Apr 09, 2021Observed: 16.67 ft at 11:07AM Apr 09, 2021Observed: 16.54 ft at 12:14PM Apr 09, 2021Observed: 16.4 ft at 1:07PM Apr 09, 2021Observed: 16.29 ft at 2:07PM Apr 09, 2021Observed: 16.21 ft at 3:14PM Apr 09, 2021Observed: 16.18 ft at 4:07PM Apr 09, 2021Observed: 16.19 ft at 5:07PM Apr 09, 2021Observed: 16.18 ft at 6:07PM Apr 09, 2021Observed: 16.19 ft at 7:07PM Apr 09, 2021Observed: 16.18 ft at 8:14PM Apr 09, 2021Observed: 16.19 ft at 9:14PM Apr 09, 2021Observed: 16.2 ft at 10:07PM Apr 09, 2021Observed: 16.23 ft at 11:07PM Apr 09, 2021Observed: 16.31 ft at 12:14AM Apr 10, 2021Observed: 16.4 ft at 1:07AM Apr 10, 2021Observed: 16.51 ft at 2:07AM Apr 10, 2021Observed: 16.63 ft at 3:29AM Apr 10, 2021Observed: 16.7 ft at 5:08AM Apr 10, 2021Observed: 16.72 ft at 6:06AM Apr 10, 2021Observed: 16.75 ft at 7:07AM Apr 10, 2021Observed: 16.8 ft at 8:08AM Apr 10, 2021Observed: 16.8 ft at 9:07AM Apr 10, 2021Highest Observation: 16.81 ft at 10:07AM Apr 10, 2021Observed: 16.72 ft at 11:07AM Apr 10, 2021Observed: 16.64 ft at 12:07PM Apr 10, 2021Observed: 16.5 ft at 1:08PM Apr 10, 2021Observed: 16.39 ft at 2:07PM Apr 10, 2021Observed: 16.36 ft at 3:08PM Apr 10, 2021Observed: 16.27 ft at 4:28PM Apr 10, 2021Observed: 16.23 ft at 5:21PM Apr 10, 2021Observed: 16.22 ft at 6:07PM Apr 10, 2021Observed: 16.21 ft at 7:13PM Apr 10, 2021Observed: 16.19 ft at 8:07PM Apr 10, 2021Observed: 16.19 ft at 9:07PM Apr 10, 2021Observed: 16.17 ft at 10:08PM Apr 10, 2021Observed: 16.18 ft at 11:08PM Apr 10, 2021Observed: 16.19 ft at 12:07AM Apr 11, 2021Observed: 16.18 ft at 1:08AM Apr 11, 2021Observed: 16.2 ft at 2:14AM Apr 11, 2021Observed: 16.2 ft at 3:07AM Apr 11, 2021Observed: 16.2 ft at 5:14AM Apr 11, 2021Observed: 16.2 ft at 6:07AM Apr 11, 2021Observed: 16.2 ft at 7:14AM Apr 11, 2021Observed: 16.19 ft at 8:07AM Apr 11, 2021Observed: 16.19 ft at 9:07AM Apr 11, 2021Observed: 16.18 ft at 10:07AM Apr 11, 2021Observed: 16.21 ft at 11:20AM Apr 11, 2021Observed: 16.2 ft at 12:14PM Apr 11, 2021Observed: 16.2 ft at 2:07PM Apr 11, 2021Observed: 16.19 ft at 3:07PM Apr 11, 2021Observed: 16.19 ft at 4:07PM Apr 11, 2021Observed: 16.22 ft at 5:15PM Apr 11, 2021Observed: 16.22 ft at 6:07PM Apr 11, 2021Observed: 16.24 ft at 7:07PM Apr 11, 2021Observed: 16.25 ft at 8:21PM Apr 11, 2021Observed: 16.27 ft at 9:07PM Apr 11, 2021Observed: 16.29 ft at 10:07PM Apr 11, 2021Observed: 16.28 ft at 11:07PM Apr 11, 2021Observed: 16.3 ft at 12:28AM Apr 12, 2021Observed: 16.28 ft at 1:14AM Apr 12, 2021Observed: 16.3 ft at 2:07AM Apr 12, 2021Observed: 16.29 ft at 3:07AM Apr 12, 2021Observed: 16.3 ft at 5:07AM Apr 12, 2021Observed: 16.33 ft at 6:07AM Apr 12, 2021Observed: 16.33 ft at 7:07AM Apr 12, 2021Observed: 16.31 ft at 8:07AM Apr 12, 2021Observed: 16.31 ft at 9:28AM Apr 12, 2021Observed: 16.32 ft at 10:14AM Apr 12, 2021Observed: 16.32 ft at 11:07AM Apr 12, 2021Observed: 16.34 ft at 12:08PM Apr 12, 2021Observed: 16.33 ft at 1:07PM Apr 12, 2021Observed: 16.33 ft at 2:07PM Apr 12, 2021Observed: 16.32 ft at 3:15PM Apr 12, 2021Observed: 16.36 ft at 4:29PM Apr 12, 2021Observed: 16.35 ft at 5:07PM Apr 12, 2021Observed: 16.35 ft at 6:07PM Apr 12, 2021Observed: 16.36 ft at 7:07PM Apr 12, 2021Observed: 16.36 ft at 8:14PM Apr 12, 2021Observed: 16.38 ft at 9:07PM Apr 12, 2021Observed: 16.39 ft at 10:07PM Apr 12, 2021Observed: 16.41 ft at 11:07PM Apr 12, 2021Observed: 16.39 ft at 12:22AM Apr 13, 2021Observed: 16.42 ft at 1:07AM Apr 13, 2021Observed: 16.42 ft at 2:07AM Apr 13, 2021Observed: 16.42 ft at 3:28AM Apr 13, 2021Observed: 16.44 ft at 4:29AM Apr 13, 2021Observed: 16.42 ft at 5:14AM Apr 13, 2021Observed: 16.45 ft at 6:07AM Apr 13, 2021Observed: 16.48 ft at 7:35AM Apr 13, 2021Observed: 16.48 ft at 8:22AM Apr 13, 2021Observed: 16.48 ft at 9:08AM Apr 13, 2021Observed: 16.5 ft at 10:07AM Apr 13, 2021Observed: 16.51 ft at 11:07AM Apr 13, 2021Observed: 16.51 ft at 12:07PM Apr 13, 2021Observed: 16.52 ft at 1:08PM Apr 13, 2021Observed: 16.51 ft at 2:07PM Apr 13, 2021EYAA2(plotting HGIRZ) Graph Created (3:17PM Apr 13, 2021)ObservedLatest observed value: 16.51 ft at 2:07 PM AKDT 13-Apr-2021. Flood Stage is 24.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gage data do not meet the quality standards of USGS gages.

NOTE: Stage may be affected by ice.

NOTE: Forecasts are not available for the Eyak River at Bridge. Only observed stages are available for this point.

Return to Area Map
Upstream Gauge - near Cordova Upstream Gauge Downstream Gauge Downstream Gauge - near Cordova
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) 24.27 ft on 08/30/2017 (P)
(2) 23.91 ft on 08/08/2016 (P)
(3) 23.92 ft on 09/29/2015 (P)
(4) 24.08 ft on 09/14/2014 (P)
(5) 25.05 ft on 09/17/2012
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.

Zoom Level:11
KML Image
Gauge LocationGauge Map Marker
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 Collapse
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 Collapse

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 Collapse
Long-term Hydrograph
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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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