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Hydrograph River at a Glance Download
Fortymile River at Walker Fork Stage (ft)Observed: 9.22 ft at 7:21PM May 21, 2020Observed: 9.24 ft at 8:21PM May 21, 2020Observed: 9.2 ft at 9:21PM May 21, 2020Observed: 9.15 ft at 10:22PM May 21, 2020Observed: 9.2 ft at 11:40PM May 21, 2020Observed: 9.2 ft at 12:27AM May 22, 2020Observed: 9.19 ft at 1:21AM May 22, 2020Observed: 9.22 ft at 2:22AM May 22, 2020Observed: 9.25 ft at 3:21AM May 22, 2020Observed: 9.27 ft at 4:21AM May 22, 2020Observed: 9.33 ft at 5:21AM May 22, 2020Observed: 9.3 ft at 6:28AM May 22, 2020Observed: 9.34 ft at 7:27AM May 22, 2020Observed: 9.38 ft at 8:20AM May 22, 2020Observed: 9.39 ft at 9:35AM May 22, 2020Observed: 9.41 ft at 10:20AM May 22, 2020Observed: 9.4 ft at 11:21AM May 22, 2020Observed: 9.38 ft at 12:28PM May 22, 2020Observed: 9.35 ft at 1:21PM May 22, 2020Observed: 9.31 ft at 2:27PM May 22, 2020Observed: 9.35 ft at 3:21PM May 22, 2020Observed: 9.32 ft at 4:22PM May 22, 2020Observed: 9.36 ft at 5:21PM May 22, 2020Observed: 9.4 ft at 6:22PM May 22, 2020Observed: 9.4 ft at 7:27PM May 22, 2020Observed: 9.36 ft at 8:21PM May 22, 2020Observed: 9.33 ft at 9:28PM May 22, 2020Observed: 9.36 ft at 10:28PM May 22, 2020Observed: 9.4 ft at 11:21PM May 22, 2020Observed: 9.42 ft at 12:28AM May 23, 2020Observed: 9.36 ft at 1:21AM May 23, 2020Observed: 9.44 ft at 2:27AM May 23, 2020Observed: 9.4 ft at 3:28AM May 23, 2020Observed: 9.43 ft at 4:21AM May 23, 2020Observed: 9.5 ft at 5:21AM May 23, 2020Observed: 9.49 ft at 6:33AM May 23, 2020Observed: 9.53 ft at 7:21AM May 23, 2020Observed: 9.54 ft at 8:21AM May 23, 2020Observed: 9.55 ft at 9:21AM May 23, 2020Observed: 9.54 ft at 10:22AM May 23, 2020Observed: 9.51 ft at 11:28AM May 23, 2020Observed: 9.5 ft at 12:20PM May 23, 2020Observed: 9.46 ft at 1:21PM May 23, 2020Observed: 9.48 ft at 2:21PM May 23, 2020Observed: 9.5 ft at 3:21PM May 23, 2020Observed: 9.49 ft at 4:21PM May 23, 2020Observed: 9.5 ft at 5:21PM May 23, 2020Observed: 9.46 ft at 6:21PM May 23, 2020Observed: 9.55 ft at 7:21PM May 23, 2020Observed: 9.54 ft at 8:21PM May 23, 2020Observed: 9.5 ft at 9:21PM May 23, 2020Observed: 9.45 ft at 10:21PM May 23, 2020Observed: 9.4 ft at 11:35PM May 23, 2020Observed: 9.46 ft at 12:21AM May 24, 2020Observed: 9.4 ft at 1:21AM May 24, 2020Observed: 9.4 ft at 3:04AM May 24, 2020Observed: 9.3 ft at 3:27AM May 24, 2020Observed: 9.42 ft at 4:21AM May 24, 2020Observed: 9.55 ft at 6:21AM May 24, 2020Observed: 9.54 ft at 7:20AM May 24, 2020Observed: 9.61 ft at 8:21AM May 24, 2020Observed: 9.55 ft at 9:21AM May 24, 2020Observed: 9.59 ft at 10:28AM May 24, 2020Observed: 9.51 ft at 11:21AM May 24, 2020Observed: 9.57 ft at 12:21PM May 24, 2020Observed: 9.55 ft at 1:27PM May 24, 2020Observed: 9.55 ft at 2:21PM May 24, 2020Observed: 9.56 ft at 3:21PM May 24, 2020Observed: 9.53 ft at 4:20PM May 24, 2020Observed: 9.54 ft at 5:21PM May 24, 2020Observed: 9.54 ft at 6:22PM May 24, 2020Observed: 9.55 ft at 7:22PM May 24, 2020Observed: 9.58 ft at 8:21PM May 24, 2020Observed: 9.57 ft at 9:21PM May 24, 2020Observed: 9.55 ft at 10:41PM May 24, 2020Observed: 9.55 ft at 11:28PM May 24, 2020Observed: 9.61 ft at 12:28AM May 25, 2020Observed: 9.57 ft at 1:21AM May 25, 2020Observed: 9.61 ft at 2:21AM May 25, 2020Observed: 9.63 ft at 3:57AM May 25, 2020Observed: 9.63 ft at 4:33AM May 25, 2020Observed: 9.68 ft at 6:28AM May 25, 2020Observed: 9.75 ft at 8:21AM May 25, 2020Observed: 9.79 ft at 9:21AM May 25, 2020Observed: 9.73 ft at 10:21AM May 25, 2020Observed: 9.72 ft at 11:21AM May 25, 2020Observed: 9.7 ft at 12:28PM May 25, 2020Observed: 9.77 ft at 1:21PM May 25, 2020Observed: 9.74 ft at 2:28PM May 25, 2020Observed: 9.75 ft at 3:20PM May 25, 2020Observed: 9.72 ft at 4:21PM May 25, 2020Observed: 9.74 ft at 5:20PM May 25, 2020Observed: 9.74 ft at 6:21PM May 25, 2020Observed: 9.8 ft at 7:21PM May 25, 2020Observed: 9.83 ft at 8:20PM May 25, 2020Observed: 9.82 ft at 9:34PM May 25, 2020Observed: 9.82 ft at 10:21PM May 25, 2020Observed: 9.82 ft at 11:22PM May 25, 2020Observed: 9.8 ft at 12:20AM May 26, 2020Observed: 9.77 ft at 1:21AM May 26, 2020Observed: 9.86 ft at 2:21AM May 26, 2020Observed: 9.89 ft at 3:22AM May 26, 2020Observed: 9.95 ft at 4:27AM May 26, 2020Observed: 9.95 ft at 5:21AM May 26, 2020Observed: 9.97 ft at 6:34AM May 26, 2020Observed: 9.98 ft at 7:46AM May 26, 2020Highest Observation: 10 ft at 8:21AM May 26, 2020Observed: 9.96 ft at 9:21AM May 26, 2020Observed: 9.96 ft at 10:21AM May 26, 2020Observed: 9.93 ft at 11:21AM May 26, 2020Observed: 9.91 ft at 12:20PM May 26, 2020Observed: 9.86 ft at 1:28PM May 26, 2020Observed: 9.82 ft at 2:21PM May 26, 2020Observed: 9.8 ft at 3:21PM May 26, 2020Observed: 9.77 ft at 4:21PM May 26, 2020Observed: 9.79 ft at 5:21PM May 26, 2020Observed: 9.81 ft at 6:20PM May 26, 2020Observed: 9.8 ft at 7:21PM May 26, 2020Observed: 9.76 ft at 8:22PM May 26, 2020Observed: 9.77 ft at 9:27PM May 26, 2020Observed: 9.78 ft at 10:21PM May 26, 2020Observed: 9.73 ft at 11:28PM May 26, 2020Observed: 9.71 ft at 12:21AM May 27, 2020Observed: 9.72 ft at 1:21AM May 27, 2020Observed: 9.68 ft at 2:27AM May 27, 2020Observed: 9.7 ft at 3:41AM May 27, 2020Observed: 9.7 ft at 4:20AM May 27, 2020Observed: 9.68 ft at 5:52AM May 27, 2020Observed: 9.69 ft at 6:21AM May 27, 2020Observed: 9.69 ft at 6:34AM May 27, 2020Observed: 9.72 ft at 7:20AM May 27, 2020Observed: 9.69 ft at 8:27AM May 27, 2020Observed: 9.7 ft at 9:21AM May 27, 2020Observed: 9.7 ft at 10:28AM May 27, 2020Observed: 9.72 ft at 11:20AM May 27, 2020Observed: 9.64 ft at 12:21PM May 27, 2020Observed: 9.69 ft at 1:21PM May 27, 2020Observed: 9.69 ft at 2:21PM May 27, 2020Observed: 9.65 ft at 3:21PM May 27, 2020Observed: 9.66 ft at 4:20PM May 27, 2020Observed: 9.63 ft at 5:21PM May 27, 2020Observed: 9.67 ft at 6:21PM May 27, 2020Observed: 9.7 ft at 7:21PM May 27, 2020Observed: 9.71 ft at 8:21PM May 27, 2020Observed: 9.73 ft at 9:20PM May 27, 2020Observed: 9.78 ft at 10:27PM May 27, 2020Observed: 9.79 ft at 11:40PM May 27, 2020Observed: 9.84 ft at 2:53AM May 28, 2020Observed: 9.86 ft at 3:28AM May 28, 2020Observed: 9.9 ft at 4:21AM May 28, 2020Observed: 9.94 ft at 5:21AM May 28, 2020Observed: 9.94 ft at 6:21AM May 28, 2020Observed: 9.92 ft at 7:34AM May 28, 2020Observed: 9.9 ft at 8:21AM May 28, 2020Observed: 9.95 ft at 9:21AM May 28, 2020Observed: 9.92 ft at 10:21AM May 28, 2020Observed: 9.9 ft at 11:21AM May 28, 2020Observed: 9.94 ft at 12:21PM May 28, 2020Observed: 9.89 ft at 1:20PM May 28, 2020Observed: 9.9 ft at 2:34PM May 28, 2020Observed: 9.9 ft at 3:20PM May 28, 2020Observed: 9.86 ft at 4:27PM May 28, 2020Observed: 9.87 ft at 5:20PM May 28, 2020Observed: 9.84 ft at 6:28PM May 28, 2020Highest Forecast: 9.88 ft 10:00PM May 28, 2020Forecast: 9.86 ft 4:00AM May 29, 2020Forecast: 9.82 ft 10:00AM May 29, 2020Forecast: 9.8 ft 4:00PM May 29, 2020Forecast: 9.76 ft 10:00PM May 29, 2020Forecast: 9.73 ft 4:00AM May 30, 2020Forecast: 9.7 ft 10:00AM May 30, 2020Forecast: 9.68 ft 4:00PM May 30, 2020Forecast: 9.65 ft 10:00PM May 30, 2020FMKA2(plotting HGIRZ) Graph Created (7:01PM May 28, 2020)ObservedForecast (issued 2:12PM May 28)Latest observed value: 9.84 ft at 6:28 PM AKDT 28-May-2020. Flood Stage is 16 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Gauge readings not available during the winter months.

NOTE: Stage and discharge data do not meet quality standards of USGS gages.

NOTE: Forecasts are not available for the Fortymile River at Walker Fork. Only observed stages are available for this point.

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Upstream Gauge - at South Fork Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 17
Flood Stage: 16
Action Stage: 15
Low Stage (in feet): -9999

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:12
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
21.59 Low spot on Taylor Highway near entrance into Walker Fork campground.
18 Road into Walker Fork campground becomes flooded.
17.66 High water mark from flooding in June of 2000.
17.05 Area around dumpster becomes flooded. Moderate flood stage.
16.86 Ground at registration area becomes flooded.
16 minor flood stage. Ground at "Campground Host" sign becomes inundated.
15 bankfull
Photos
(1) Bridge
(2) Downstream
(3) Upstream
(4) Fortymile River at Walker Fork looking upstream, Stage = 10.04 ft
(5) Fortymile River at Walker Fork looking downstream, Stage = 10.04 ft
About This Location Collapse

Latitude: 64.076111° N, Longitude: 141.630556° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 16 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 1730.61 ft 1746.61 ft 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  
Additional Information Collapse
Long-term Hydrograph
Resources Collapse
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
Fairbanks Weather Forecast Office
UAF-IARC Bldg. P.O. Box 757345
Fairbanks, AK 99775-7345
(907) 458-3700
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Page last modified: 1-Mar-2019 12:31 AM
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