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Hydrograph River at a Glance Download
Grizzly Bear Creek near Keystone Stage (ft)Observed: 2.53 ft at 8:55AM Oct 26, 2020Observed: 2.55 ft at 9:00AM Oct 26, 2020Observed: 2.6 ft at 9:05AM Oct 26, 2020Observed: 2.67 ft at 9:10AM Oct 26, 2020Observed: 2.67 ft at 9:12AM Oct 26, 2020Observed: 2.74 ft at 9:15AM Oct 26, 2020Observed: 2.74 ft at 9:17AM Oct 26, 2020Observed: 2.69 ft at 10:15AM Oct 26, 2020Observed: 2.65 ft at 10:20AM Oct 26, 2020Observed: 2.63 ft at 10:25AM Oct 26, 2020Observed: 2.58 ft at 10:30AM Oct 26, 2020Observed: 2.59 ft at 10:35AM Oct 26, 2020Observed: 2.57 ft at 10:40AM Oct 26, 2020Observed: 2.54 ft at 10:45AM Oct 26, 2020Observed: 2.52 ft at 10:50AM Oct 26, 2020Observed: 2.53 ft at 10:55AM Oct 26, 2020Observed: 2.51 ft at 11:00AM Oct 26, 2020Observed: 2.52 ft at 11:05AM Oct 26, 2020Observed: 2.56 ft at 11:10AM Oct 26, 2020Observed: 2.54 ft at 11:15AM Oct 26, 2020Observed: 2.52 ft at 11:20AM Oct 26, 2020Observed: 2.52 ft at 11:25AM Oct 26, 2020Observed: 2.52 ft at 11:30AM Oct 26, 2020Observed: 2.49 ft at 11:35AM Oct 26, 2020Observed: 2.49 ft at 11:40AM Oct 26, 2020Observed: 2.5 ft at 11:45AM Oct 26, 2020Observed: 2.47 ft at 11:50AM Oct 26, 2020Observed: 2.47 ft at 11:55AM Oct 26, 2020Observed: 2.48 ft at 12:00PM Oct 26, 2020Observed: 2.5 ft at 12:05PM Oct 26, 2020Observed: 2.53 ft at 12:10PM Oct 26, 2020Observed: 2.53 ft at 12:11PM Oct 26, 2020Observed: 2.53 ft at 12:12PM Oct 26, 2020Observed: 2.7 ft at 12:15PM Oct 26, 2020Observed: 2.7 ft at 12:16PM Oct 26, 2020Observed: 2.7 ft at 12:17PM Oct 26, 2020Highest Observation: 2.79 ft at 12:40PM Oct 26, 2020Observed: 2.76 ft at 12:45PM Oct 26, 2020Observed: 2.77 ft at 12:55PM Oct 26, 2020Observed: 2.65 ft at 1:00PM Oct 26, 2020Observed: 2.63 ft at 1:05PM Oct 26, 2020Observed: 2.52 ft at 1:10PM Oct 26, 2020Observed: 2.51 ft at 1:15PM Oct 26, 2020Observed: 2.49 ft at 1:20PM Oct 26, 2020Observed: 2.51 ft at 1:25PM Oct 26, 2020Observed: 2.51 ft at 1:30PM Oct 26, 2020Observed: 2.5 ft at 1:35PM Oct 26, 2020Observed: 2.49 ft at 1:40PM Oct 26, 2020Observed: 2.51 ft at 1:45PM Oct 26, 2020Observed: 2.47 ft at 1:50PM Oct 26, 2020Observed: 2.5 ft at 1:55PM Oct 26, 2020Observed: 2.46 ft at 2:00PM Oct 26, 2020Observed: 2.47 ft at 2:05PM Oct 26, 2020Observed: 2.46 ft at 2:10PM Oct 26, 2020Observed: 2.46 ft at 2:15PM Oct 26, 2020Observed: 2.46 ft at 2:20PM Oct 26, 2020Observed: 2.43 ft at 2:25PM Oct 26, 2020Observed: 2.43 ft at 2:30PM Oct 26, 2020Observed: 2.44 ft at 2:35PM Oct 26, 2020Observed: 2.43 ft at 2:40PM Oct 26, 2020Observed: 2.45 ft at 2:45PM Oct 26, 2020Observed: 2.44 ft at 2:50PM Oct 26, 2020Observed: 2.44 ft at 2:55PM Oct 26, 2020Observed: 2.42 ft at 3:00PM Oct 26, 2020Observed: 2.43 ft at 3:05PM Oct 26, 2020Observed: 2.43 ft at 3:10PM Oct 26, 2020Observed: 2.42 ft at 3:15PM Oct 26, 2020Observed: 2.42 ft at 3:20PM Oct 26, 2020Observed: 2.41 ft at 3:25PM Oct 26, 2020Observed: 2.41 ft at 3:30PM Oct 26, 2020Observed: 2.43 ft at 3:35PM Oct 26, 2020Observed: 2.42 ft at 3:40PM Oct 26, 2020Observed: 2.41 ft at 3:45PM Oct 26, 2020Observed: 2.42 ft at 3:50PM Oct 26, 2020Observed: 2.42 ft at 3:55PM Oct 26, 2020Observed: 2.41 ft at 4:00PM Oct 26, 2020Observed: 2.4 ft at 4:05PM Oct 26, 2020Observed: 2.41 ft at 4:10PM Oct 26, 2020Observed: 2.41 ft at 4:15PM Oct 26, 2020Observed: 2.4 ft at 4:20PM Oct 26, 2020Observed: 2.41 ft at 4:25PM Oct 26, 2020Observed: 2.41 ft at 4:30PM Oct 26, 2020Observed: 2.41 ft at 4:35PM Oct 26, 2020Observed: 2.41 ft at 4:40PM Oct 26, 2020Observed: 2.41 ft at 4:50PM Oct 26, 2020Observed: 2.41 ft at 4:55PM Oct 26, 2020Observed: 2.41 ft at 5:00PM Oct 26, 2020Observed: 2.41 ft at 5:05PM Oct 26, 2020Observed: 2.4 ft at 5:10PM Oct 26, 2020Observed: 2.41 ft at 5:15PM Oct 26, 2020Observed: 2.41 ft at 5:20PM Oct 26, 2020Observed: 2.41 ft at 5:25PM Oct 26, 2020Observed: 2.41 ft at 5:30PM Oct 26, 2020Observed: 2.4 ft at 5:35PM Oct 26, 2020Observed: 2.41 ft at 5:40PM Oct 26, 2020Observed: 2.4 ft at 5:45PM Oct 26, 2020Observed: 2.41 ft at 5:50PM Oct 26, 2020Observed: 2.41 ft at 5:55PM Oct 26, 2020Observed: 2.4 ft at 6:00PM Oct 26, 2020Observed: 2.4 ft at 6:05PM Oct 26, 2020Observed: 2.41 ft at 6:10PM Oct 26, 2020Observed: 2.41 ft at 6:15PM Oct 26, 2020Observed: 2.41 ft at 6:20PM Oct 26, 2020Observed: 2.4 ft at 6:25PM Oct 26, 2020Observed: 2.41 ft at 6:30PM Oct 26, 2020Observed: 2.41 ft at 6:31PM Oct 26, 2020Observed: 2.41 ft at 6:35PM Oct 26, 2020Observed: 2.41 ft at 6:36PM Oct 26, 2020Observed: 2.41 ft at 6:45PM Oct 26, 2020Observed: 2.41 ft at 6:50PM Oct 26, 2020Observed: 2.42 ft at 6:55PM Oct 26, 2020Observed: 2.41 ft at 7:00PM Oct 26, 2020Observed: 2.42 ft at 7:05PM Oct 26, 2020Observed: 2.41 ft at 7:10PM Oct 26, 2020Observed: 2.41 ft at 7:15PM Oct 26, 2020Observed: 2.42 ft at 7:20PM Oct 26, 2020Observed: 2.41 ft at 7:25PM Oct 26, 2020Observed: 2.41 ft at 7:30PM Oct 26, 2020Observed: 2.41 ft at 7:35PM Oct 26, 2020Observed: 2.41 ft at 7:40PM Oct 26, 2020Observed: 2.42 ft at 7:45PM Oct 26, 2020Observed: 2.42 ft at 7:50PM Oct 26, 2020Observed: 2.43 ft at 7:55PM Oct 26, 2020Observed: 2.43 ft at 8:00PM Oct 26, 2020Observed: 2.43 ft at 8:05PM Oct 26, 2020Observed: 2.42 ft at 8:10PM Oct 26, 2020Observed: 2.42 ft at 8:15PM Oct 26, 2020Observed: 2.43 ft at 8:20PM Oct 26, 2020Observed: 2.44 ft at 8:25PM Oct 26, 2020Observed: 2.44 ft at 8:30PM Oct 26, 2020Observed: 2.45 ft at 8:35PM Oct 26, 2020Observed: 2.43 ft at 8:40PM Oct 26, 2020Observed: 2.44 ft at 8:45PM Oct 26, 2020Observed: 2.44 ft at 8:50PM Oct 26, 2020Observed: 2.47 ft at 8:55PM Oct 26, 2020Observed: 2.45 ft at 9:00PM Oct 26, 2020Observed: 2.46 ft at 9:05PM Oct 26, 2020Observed: 2.48 ft at 9:10PM Oct 26, 2020Observed: 2.46 ft at 9:15PM Oct 26, 2020Observed: 2.48 ft at 9:20PM Oct 26, 2020Observed: 2.48 ft at 9:25PM Oct 26, 2020Observed: 2.51 ft at 9:30PM Oct 26, 2020Observed: 2.49 ft at 9:35PM Oct 26, 2020Observed: 2.52 ft at 9:40PM Oct 26, 2020Observed: 2.52 ft at 9:45PM Oct 26, 2020Observed: 2.52 ft at 9:50PM Oct 26, 2020Observed: 2.52 ft at 9:55PM Oct 26, 2020Observed: 2.52 ft at 10:00PM Oct 26, 2020Observed: 2.56 ft at 10:05PM Oct 26, 2020Observed: 2.54 ft at 10:10PM Oct 26, 2020Observed: 2.56 ft at 10:15PM Oct 26, 2020Observed: 2.56 ft at 10:16PM Oct 26, 2020Observed: 2.56 ft at 10:17PM Oct 26, 2020Observed: 2.58 ft at 10:20PM Oct 26, 2020Observed: 2.58 ft at 10:21PM Oct 26, 2020Observed: 2.58 ft at 10:22PM Oct 26, 2020Observed: 2.78 ft at 11:00PM Oct 26, 2020Observed: 2.78 ft at 11:01PM Oct 26, 2020Observed: 2.64 ft at 11:05PM Oct 26, 2020Observed: 2.64 ft at 11:06PM Oct 26, 2020USGS--Water Resources of the United StatesGNKS2(plotting HGIRG) Graph Created (8:53AM Oct 29, 2020)ObservedLatest observed value: 2.64 ft at 11:06 PM MDT 26-Oct-2020. Flood Stage is 4.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the Grizzly Bear Creek near Keystone. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 6
Moderate Flood Stage: 5.5
Flood Stage: 4.5
Action Stage: 4
Low Stage (in feet): -9999

Historic Crests
(1) 6.32 ft on 10/11/2013
(2) 5.78 ft on 05/20/2016
(3) 5.71 ft on 05/28/2019
(4) 5.68 ft on 05/24/2015
(5) 5.60 ft on 07/11/2001
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.71 ft on 05/28/2019
(2) 5.42 ft on 07/18/2018
(3) 3.69 ft on 06/05/2017
(4) 5.78 ft on 05/20/2016
(5) 1.61 ft on 05/01/2016
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:14
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
6 Major Flood Stage. Water will begin to flow down Main Street in Keystone.
5.5 Moderate Flood Stage. Water will begin to cover bridges and parking areas in Keystone.
5 Minor flooding along the creek and downstream. Water begins to fill Grizzly Bear Creek in Keystone.
4.5 Minor flood stage. The creek will overflow and cut off access to Grizzly Gulch Road. Overflows the lower banks downstream from gage.
4 Action Stage and bankfull.
Photos
(1) Looking downstream
(2) Looking upstream
(3) Gage site
About This Location Collapse

Latitude: 43.878056° N, Longitude: 103.437222° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 4.5 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 4510 ft 4515 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:

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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
Rapid City Weather Forecast Office
300 East Signal Drive
Rapid City, SD 57701-3800
(605) 341-7531
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Page last modified: 1-Mar-2019 12:33 AM
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