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Hydrograph River at a Glance Download
Grizzly Bear Creek near Keystone Stage (ft)Flow (kcfs)Observed: 3.67 ft at 10:00AM Jan 15, 2021Observed: 3.66 ft at 10:15AM Jan 15, 2021Observed: 3.66 ft at 10:30AM Jan 15, 2021Observed: 3.66 ft at 10:45AM Jan 15, 2021Observed: 3.66 ft at 11:00AM Jan 15, 2021Observed: 3.66 ft at 11:15AM Jan 15, 2021Observed: 3.66 ft at 11:30AM Jan 15, 2021Observed: 3.66 ft at 11:45AM Jan 15, 2021Observed: 3.67 ft at 12:00PM Jan 15, 2021Observed: 3.67 ft at 12:15PM Jan 15, 2021Observed: 3.67 ft at 12:30PM Jan 15, 2021Observed: 3.67 ft at 12:45PM Jan 15, 2021Observed: 3.66 ft at 1:00PM Jan 15, 2021Observed: 3.67 ft at 1:15PM Jan 15, 2021Observed: 3.66 ft at 1:30PM Jan 15, 2021Observed: 3.67 ft at 1:45PM Jan 15, 2021Observed: 3.67 ft at 2:00PM Jan 15, 2021Observed: 3.67 ft at 2:15PM Jan 15, 2021Observed: 3.66 ft at 2:30PM Jan 15, 2021Observed: 3.66 ft at 2:45PM Jan 15, 2021Observed: 3.67 ft at 3:00PM Jan 15, 2021Observed: 3.67 ft at 3:15PM Jan 15, 2021Observed: 3.67 ft at 3:30PM Jan 15, 2021Observed: 3.67 ft at 3:45PM Jan 15, 2021Observed: 3.67 ft at 4:00PM Jan 15, 2021Observed: 3.67 ft at 4:15PM Jan 15, 2021Observed: 3.67 ft at 4:30PM Jan 15, 2021Observed: 3.66 ft at 4:45PM Jan 15, 2021Observed: 3.67 ft at 5:00PM Jan 15, 2021Observed: 3.67 ft at 5:15PM Jan 15, 2021Observed: 3.67 ft at 5:30PM Jan 15, 2021Observed: 3.67 ft at 5:45PM Jan 15, 2021Observed: 3.67 ft at 6:00PM Jan 15, 2021Observed: 3.67 ft at 6:15PM Jan 15, 2021Observed: 3.67 ft at 6:30PM Jan 15, 2021Observed: 3.67 ft at 6:45PM Jan 15, 2021Observed: 3.67 ft at 7:00PM Jan 15, 2021Observed: 3.67 ft at 7:15PM Jan 15, 2021Observed: 3.67 ft at 7:30PM Jan 15, 2021Observed: 3.67 ft at 7:45PM Jan 15, 2021Observed: 3.67 ft at 8:00PM Jan 15, 2021Observed: 3.67 ft at 8:15PM Jan 15, 2021Observed: 3.67 ft at 8:30PM Jan 15, 2021Observed: 3.67 ft at 8:45PM Jan 15, 2021Observed: 3.67 ft at 9:00PM Jan 15, 2021Observed: 3.67 ft at 9:15PM Jan 15, 2021Observed: 3.67 ft at 9:30PM Jan 15, 2021Observed: 3.67 ft at 9:45PM Jan 15, 2021Observed: 3.67 ft at 10:00PM Jan 15, 2021Observed: 3.67 ft at 10:15PM Jan 15, 2021Observed: 3.67 ft at 10:30PM Jan 15, 2021Observed: 3.67 ft at 10:45PM Jan 15, 2021Observed: 3.67 ft at 11:00PM Jan 15, 2021Observed: 3.67 ft at 11:15PM Jan 15, 2021Observed: 3.67 ft at 11:30PM Jan 15, 2021Observed: 3.67 ft at 11:45PM Jan 15, 2021Observed: 3.67 ft at 12:00AM Jan 16, 2021Observed: 3.67 ft at 12:15AM Jan 16, 2021Observed: 3.67 ft at 12:30AM Jan 16, 2021Observed: 3.67 ft at 12:45AM Jan 16, 2021Observed: 3.67 ft at 1:00AM Jan 16, 2021Observed: 3.67 ft at 1:15AM Jan 16, 2021Observed: 3.67 ft at 1:30AM Jan 16, 2021Observed: 3.67 ft at 1:45AM Jan 16, 2021Observed: 3.67 ft at 2:00AM Jan 16, 2021Observed: 3.67 ft at 2:15AM Jan 16, 2021Observed: 3.67 ft at 2:30AM Jan 16, 2021Observed: 3.67 ft at 2:45AM Jan 16, 2021Observed: 3.67 ft at 3:00AM Jan 16, 2021Observed: 3.67 ft at 3:15AM Jan 16, 2021Observed: 3.67 ft at 3:30AM Jan 16, 2021Observed: 3.67 ft at 3:45AM Jan 16, 2021Observed: 3.67 ft at 4:00AM Jan 16, 2021Observed: 3.67 ft at 4:15AM Jan 16, 2021Observed: 3.67 ft at 4:30AM Jan 16, 2021Observed: 3.67 ft at 4:45AM Jan 16, 2021Observed: 3.67 ft at 5:00AM Jan 16, 2021Observed: 3.67 ft at 5:15AM Jan 16, 2021Observed: 3.67 ft at 5:30AM Jan 16, 2021Observed: 3.67 ft at 5:45AM Jan 16, 2021Observed: 3.67 ft at 6:00AM Jan 16, 2021Observed: 3.67 ft at 6:15AM Jan 16, 2021Observed: 3.67 ft at 6:30AM Jan 16, 2021Observed: 3.67 ft at 6:45AM Jan 16, 2021Observed: 3.67 ft at 7:00AM Jan 16, 2021Observed: 3.67 ft at 7:15AM Jan 16, 2021Observed: 3.67 ft at 7:30AM Jan 16, 2021Observed: 3.67 ft at 7:45AM Jan 16, 2021Observed: 3.67 ft at 8:00AM Jan 16, 2021Observed: 3.67 ft at 8:15AM Jan 16, 2021Observed: 3.67 ft at 8:30AM Jan 16, 2021Observed: 3.67 ft at 8:45AM Jan 16, 2021Observed: 3.67 ft at 9:00AM Jan 16, 2021Observed: 3.67 ft at 9:15AM Jan 16, 2021Observed: 3.67 ft at 9:30AM Jan 16, 2021Observed: 3.67 ft at 9:45AM Jan 16, 2021Observed: 3.67 ft at 10:00AM Jan 16, 2021Observed: 3.67 ft at 10:15AM Jan 16, 2021Observed: 3.67 ft at 10:30AM Jan 16, 2021Observed: 3.67 ft at 10:45AM Jan 16, 2021Observed: 3.67 ft at 11:00AM Jan 16, 2021Observed: 3.67 ft at 11:15AM Jan 16, 2021Observed: 3.67 ft at 11:30AM Jan 16, 2021Highest Observation: 3.68 ft at 11:45AM Jan 16, 2021Highest Observation: 3.68 ft at 12:00PM Jan 16, 2021Highest Observation: 3.68 ft at 12:15PM Jan 16, 2021Highest Observation: 3.68 ft at 12:30PM Jan 16, 2021Observed: 3.67 ft at 12:45PM Jan 16, 2021Observed: 3.67 ft at 1:00PM Jan 16, 2021Observed: 3.67 ft at 1:15PM Jan 16, 2021Highest Observation: 3.68 ft at 1:30PM Jan 16, 2021Observed: 3.67 ft at 1:45PM Jan 16, 2021Observed: 3.67 ft at 2:00PM Jan 16, 2021Observed: 3.67 ft at 2:15PM Jan 16, 2021Observed: 3.67 ft at 2:30PM Jan 16, 2021Observed: 3.67 ft at 2:45PM Jan 16, 2021Observed: 3.67 ft at 3:00PM Jan 16, 2021Observed: 3.67 ft at 3:15PM Jan 16, 2021Observed: 3.67 ft at 3:30PM Jan 16, 2021Highest Observation: 3.68 ft at 3:45PM Jan 16, 2021Observed: 3.67 ft at 4:00PM Jan 16, 2021Observed: 3.67 ft at 4:15PM Jan 16, 2021Observed: 3.67 ft at 4:30PM Jan 16, 2021Observed: 3.67 ft at 4:45PM Jan 16, 2021Observed: 3.67 ft at 5:00PM Jan 16, 2021Observed: 3.67 ft at 5:15PM Jan 16, 2021Observed: 3.67 ft at 5:30PM Jan 16, 2021Highest Observation: 3.68 ft at 5:45PM Jan 16, 2021Observed: 3.67 ft at 6:00PM Jan 16, 2021Observed: 3.67 ft at 6:15PM Jan 16, 2021Observed: 3.67 ft at 6:30PM Jan 16, 2021Observed: 3.67 ft at 6:45PM Jan 16, 2021Observed: 3.67 ft at 7:00PM Jan 16, 2021Highest Observation: 3.68 ft at 7:15PM Jan 16, 2021Observed: 3.67 ft at 7:30PM Jan 16, 2021Observed: 3.67 ft at 7:45PM Jan 16, 2021Observed: 3.67 ft at 8:00PM Jan 16, 2021Observed: 3.67 ft at 8:15PM Jan 16, 2021Observed: 3.67 ft at 8:30PM Jan 16, 2021Observed: 3.67 ft at 8:45PM Jan 16, 2021Highest Observation: 3.68 ft at 9:00PM Jan 16, 2021Highest Observation: 3.68 ft at 9:15PM Jan 16, 2021Highest Observation: 3.68 ft at 9:30PM Jan 16, 2021Observed: 3.67 ft at 9:45PM Jan 16, 2021Observed: 3.67 ft at 10:00PM Jan 16, 2021Observed: 3.67 ft at 10:15PM Jan 16, 2021Observed: 3.67 ft at 10:30PM Jan 16, 2021Observed: 3.67 ft at 10:45PM Jan 16, 2021Observed: 3.67 ft at 11:00PM Jan 16, 2021Observed: 3.67 ft at 11:15PM Jan 16, 2021Observed: 3.67 ft at 11:30PM Jan 16, 2021Observed: 3.67 ft at 11:45PM Jan 16, 2021Observed: 3.67 ft at 12:00AM Jan 17, 2021Observed: 3.67 ft at 12:15AM Jan 17, 2021Observed: 3.67 ft at 12:30AM Jan 17, 2021Observed: 3.67 ft at 12:45AM Jan 17, 2021Observed: 3.67 ft at 1:00AM Jan 17, 2021Observed: 3.67 ft at 1:15AM Jan 17, 2021Observed: 3.67 ft at 1:30AM Jan 17, 2021Highest Observation: 3.68 ft at 1:45AM Jan 17, 2021Observed: 3.67 ft at 2:00AM Jan 17, 2021Highest Observation: 3.68 ft at 2:15AM Jan 17, 2021Highest Observation: 3.68 ft at 2:30AM Jan 17, 2021Highest Observation: 3.68 ft at 2:45AM Jan 17, 2021Observed: 3.67 ft at 3:00AM Jan 17, 2021Observed: 3.67 ft at 3:15AM Jan 17, 2021Observed: 3.67 ft at 3:30AM Jan 17, 2021Observed: 3.67 ft at 3:45AM Jan 17, 2021Observed: 3.67 ft at 4:00AM Jan 17, 2021Highest Observation: 3.68 ft at 4:15AM Jan 17, 2021Highest Observation: 3.68 ft at 4:30AM Jan 17, 2021Observed: 3.67 ft at 4:45AM Jan 17, 2021Observed: 3.67 ft at 5:00AM Jan 17, 2021Observed: 3.67 ft at 5:15AM Jan 17, 2021Observed: 3.67 ft at 5:30AM Jan 17, 2021Observed: 3.67 ft at 5:45AM Jan 17, 2021Observed: 3.67 ft at 6:00AM Jan 17, 2021Observed: 3.67 ft at 6:15AM Jan 17, 2021Observed: 3.67 ft at 6:30AM Jan 17, 2021Observed: 3.67 ft at 6:45AM Jan 17, 2021Observed: 3.67 ft at 7:00AM Jan 17, 2021Observed: 3.67 ft at 7:15AM Jan 17, 2021Observed: 3.67 ft at 7:30AM Jan 17, 2021Observed: 3.67 ft at 7:45AM Jan 17, 2021Observed: 3.67 ft at 8:00AM Jan 17, 2021Observed: 3.67 ft at 8:15AM Jan 17, 2021Observed: 3.67 ft at 8:30AM Jan 17, 2021Observed: 3.67 ft at 8:45AM Jan 17, 2021Observed: 3.67 ft at 9:00AM Jan 17, 2021Observed: 3.67 ft at 9:15AM Jan 17, 2021Observed: 3.67 ft at 9:30AM Jan 17, 2021Observed: 3.67 ft at 9:45AM Jan 17, 2021Observed: 3.67 ft at 10:00AM Jan 17, 2021Highest Observation: 3.68 ft at 10:15AM Jan 17, 2021Observed: 3.67 ft at 10:30AM Jan 17, 2021Observed: 3.67 ft at 10:45AM Jan 17, 2021Observed: 3.67 ft at 11:00AM Jan 17, 2021Observed: 3.67 ft at 11:15AM Jan 17, 2021Observed: 3.67 ft at 11:30AM Jan 17, 2021Observed: 3.67 ft at 11:45AM Jan 17, 2021Observed: 3.67 ft at 12:00PM Jan 17, 2021Observed: 3.67 ft at 12:15PM Jan 17, 2021Observed: 3.67 ft at 12:30PM Jan 17, 2021Observed: 3.67 ft at 12:45PM Jan 17, 2021Observed: 3.67 ft at 1:00PM Jan 17, 2021Highest Observation: 3.68 ft at 1:15PM Jan 17, 2021Highest Observation: 3.68 ft at 1:30PM Jan 17, 2021Highest Observation: 3.68 ft at 1:45PM Jan 17, 2021Observed: 3.67 ft at 2:00PM Jan 17, 2021Observed: 3.67 ft at 2:15PM Jan 17, 2021Observed: 3.67 ft at 2:30PM Jan 17, 2021Observed: 3.67 ft at 2:45PM Jan 17, 2021Observed: 3.67 ft at 3:00PM Jan 17, 2021Observed: 3.67 ft at 3:15PM Jan 17, 2021Observed: 3.67 ft at 3:30PM Jan 17, 2021Observed: 3.67 ft at 3:45PM Jan 17, 2021Observed: 3.67 ft at 4:00PM Jan 17, 2021Highest Observation: 3.68 ft at 4:15PM Jan 17, 2021Highest Observation: 3.68 ft at 4:30PM Jan 17, 2021Highest Observation: 3.68 ft at 4:45PM Jan 17, 2021Highest Observation: 3.68 ft at 5:00PM Jan 17, 2021Observed: 3.67 ft at 5:15PM Jan 17, 2021Observed: 3.67 ft at 5:30PM Jan 17, 2021Observed: 3.67 ft at 5:45PM Jan 17, 2021Observed: 3.67 ft at 6:00PM Jan 17, 2021Observed: 3.67 ft at 6:15PM Jan 17, 2021Observed: 3.67 ft at 6:30PM Jan 17, 2021Observed: 3.67 ft at 6:45PM Jan 17, 2021Observed: 3.67 ft at 7:00PM Jan 17, 2021Observed: 3.67 ft at 7:15PM Jan 17, 2021Observed: 3.67 ft at 7:30PM Jan 17, 2021Observed: 3.67 ft at 7:45PM Jan 17, 2021Highest Observation: 3.68 ft at 8:00PM Jan 17, 2021Highest Observation: 3.68 ft at 8:15PM Jan 17, 2021Highest Observation: 3.68 ft at 8:30PM Jan 17, 2021Observed: 3.67 ft at 8:45PM Jan 17, 2021Observed: 3.67 ft at 9:00PM Jan 17, 2021Observed: 3.67 ft at 9:15PM Jan 17, 2021Observed: 3.67 ft at 9:30PM Jan 17, 2021Observed: 3.67 ft at 9:45PM Jan 17, 2021Observed: 3.67 ft at 10:00PM Jan 17, 2021Observed: 3.67 ft at 10:15PM Jan 17, 2021Observed: 3.67 ft at 10:30PM Jan 17, 2021Observed: 3.67 ft at 10:45PM Jan 17, 2021Observed: 3.67 ft at 11:00PM Jan 17, 2021Highest Observation: 3.68 ft at 11:15PM Jan 17, 2021Observed: 3.67 ft at 11:30PM Jan 17, 2021Observed: 3.67 ft at 11:45PM Jan 17, 2021Observed: 3.67 ft at 12:00AM Jan 18, 2021Observed: 3.67 ft at 12:15AM Jan 18, 2021Observed: 3.67 ft at 12:30AM Jan 18, 2021Observed: 3.67 ft at 12:45AM Jan 18, 2021Observed: 3.67 ft at 1:00AM Jan 18, 2021Observed: 3.67 ft at 1:15AM Jan 18, 2021Observed: 3.67 ft at 1:30AM Jan 18, 2021Observed: 3.67 ft at 1:45AM Jan 18, 2021Observed: 3.67 ft at 2:00AM Jan 18, 2021Observed: 3.67 ft at 2:15AM Jan 18, 2021Observed: 3.67 ft at 2:30AM Jan 18, 2021Highest Observation: 3.68 ft at 2:45AM Jan 18, 2021Observed: 3.67 ft at 3:00AM Jan 18, 2021Observed: 3.67 ft at 3:15AM Jan 18, 2021Observed: 3.67 ft at 3:30AM Jan 18, 2021Observed: 3.67 ft at 3:45AM Jan 18, 2021Observed: 3.67 ft at 4:00AM Jan 18, 2021Observed: 3.67 ft at 4:15AM Jan 18, 2021Observed: 3.67 ft at 4:30AM Jan 18, 2021Highest Observation: 3.68 ft at 4:45AM Jan 18, 2021Highest Observation: 3.68 ft at 5:00AM Jan 18, 2021Observed: 3.67 ft at 5:15AM Jan 18, 2021Observed: 3.67 ft at 5:30AM Jan 18, 2021Observed: 3.67 ft at 5:45AM Jan 18, 2021Observed: 3.67 ft at 6:00AM Jan 18, 2021Observed: 3.67 ft at 6:15AM Jan 18, 2021Observed: 3.67 ft at 6:30AM Jan 18, 2021Highest Observation: 3.68 ft at 6:45AM Jan 18, 2021Highest Observation: 3.68 ft at 7:00AM Jan 18, 2021Highest Observation: 3.68 ft at 7:15AM Jan 18, 2021Highest Observation: 3.68 ft at 7:30AM Jan 18, 2021Highest Observation: 3.68 ft at 7:45AM Jan 18, 2021Observed: 3.67 ft at 8:00AM Jan 18, 2021Observed: 3.67 ft at 8:15AM Jan 18, 2021Observed: 3.67 ft at 8:30AM Jan 18, 2021Observed: 3.67 ft at 8:45AM Jan 18, 2021USGS--Water Resources of the United StatesGLNS2(plotting HGIRG) Graph Created (9:53AM Jan 18, 2021)ObservedLatest observed value: 3.67 ft at 8:45 AM MST 18-Jan-2021. Flood Stage is 7.5 ft
About this graph
Tabular Data (UTC)
Tabular Data (MST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: USGS operates this gage on a seasonal basis. No data are available during winter months.

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:
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
Rapid City Weather Forecast Office
300 East Signal Drive
Rapid City, SD 57701-3800
(605) 341-7531
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Page last modified: 2-Nov-2020 7:28 PM 		Disclaimer
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