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Hydrograph River at a Glance Download
Belle Fourche River at Keyhole Reservoir Pool (ft)Highest Observation: 4095.11 ft at 12:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 1:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 1:15PM Jan 23, 2021Observed: 4095.1 ft at 1:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 1:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 2:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 2:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 2:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 2:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 3:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 3:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 3:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 3:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 4:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 4:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 4:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 4:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 5:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 5:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 5:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 5:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 6:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 6:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 6:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 6:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 7:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 7:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 7:30PM Jan 23, 2021Observed: 4095.1 ft at 7:45PM Jan 23, 2021Observed: 4095.1 ft at 8:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 8:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 8:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 8:45PM Jan 23, 2021Observed: 4095.1 ft at 9:00PM Jan 23, 2021Highest Observation: 4095.11 ft at 9:15PM Jan 23, 2021Highest Observation: 4095.11 ft at 9:30PM Jan 23, 2021Highest Observation: 4095.11 ft at 9:45PM Jan 23, 2021Highest Observation: 4095.11 ft at 10:00PM Jan 23, 2021Observed: 4095.1 ft at 10:15PM Jan 23, 2021Observed: 4095.1 ft at 10:30PM Jan 23, 2021Observed: 4095.1 ft at 10:45PM Jan 23, 2021Observed: 4095.1 ft at 11:00PM Jan 23, 2021Observed: 4095.1 ft at 11:15PM Jan 23, 2021Observed: 4095.1 ft at 11:30PM Jan 23, 2021Observed: 4095.1 ft at 11:45PM Jan 23, 2021Observed: 4095.1 ft at 12:00AM Jan 24, 2021Observed: 4095.1 ft at 12:15AM Jan 24, 2021Highest Observation: 4095.11 ft at 12:30AM Jan 24, 2021Observed: 4095.1 ft at 12:45AM Jan 24, 2021Observed: 4095.1 ft at 1:00AM Jan 24, 2021Observed: 4095.1 ft at 1:15AM Jan 24, 2021Observed: 4095.1 ft at 1:30AM Jan 24, 2021Observed: 4095.1 ft at 1:45AM Jan 24, 2021Observed: 4095.1 ft at 2:00AM Jan 24, 2021Observed: 4095.1 ft at 2:15AM Jan 24, 2021Observed: 4095.1 ft at 2:30AM Jan 24, 2021Observed: 4095.1 ft at 2:45AM Jan 24, 2021Highest Observation: 4095.11 ft at 3:00AM Jan 24, 2021Observed: 4095.1 ft at 3:15AM Jan 24, 2021Observed: 4095.1 ft at 3:30AM Jan 24, 2021Observed: 4095.1 ft at 3:45AM Jan 24, 2021Highest Observation: 4095.11 ft at 4:00AM Jan 24, 2021Highest Observation: 4095.11 ft at 4:15AM Jan 24, 2021Observed: 4095.1 ft at 4:30AM Jan 24, 2021Observed: 4095.1 ft at 4:45AM Jan 24, 2021Highest Observation: 4095.11 ft at 5:00AM Jan 24, 2021Highest Observation: 4095.11 ft at 5:15AM Jan 24, 2021Highest Observation: 4095.11 ft at 5:30AM Jan 24, 2021Highest Observation: 4095.11 ft at 5:45AM Jan 24, 2021Highest Observation: 4095.11 ft at 6:00AM Jan 24, 2021Highest Observation: 4095.11 ft at 6:15AM Jan 24, 2021Highest Observation: 4095.11 ft at 6:30AM Jan 24, 2021Highest Observation: 4095.11 ft at 6:45AM Jan 24, 2021Observed: 4095.1 ft at 7:00AM Jan 24, 2021Observed: 4095.1 ft at 7:15AM Jan 24, 2021Observed: 4095.1 ft at 7:30AM Jan 24, 2021Observed: 4095.1 ft at 7:45AM Jan 24, 2021Observed: 4095.1 ft at 8:00AM Jan 24, 2021Observed: 4095.1 ft at 8:15AM Jan 24, 2021Observed: 4095.1 ft at 8:30AM Jan 24, 2021Observed: 4095.1 ft at 8:45AM Jan 24, 2021Observed: 4095.1 ft at 9:00AM Jan 24, 2021Observed: 4095.1 ft at 9:15AM Jan 24, 2021Observed: 4095.1 ft at 9:30AM Jan 24, 2021Observed: 4095.1 ft at 9:45AM Jan 24, 2021Observed: 4095.1 ft at 10:00AM Jan 24, 2021Observed: 4095.1 ft at 10:15AM Jan 24, 2021Observed: 4095.1 ft at 10:30AM Jan 24, 2021Highest Observation: 4095.11 ft at 10:45AM Jan 24, 2021Observed: 4095.1 ft at 11:00AM Jan 24, 2021Observed: 4095.1 ft at 11:15AM Jan 24, 2021Observed: 4095.1 ft at 11:30AM Jan 24, 2021Highest Observation: 4095.11 ft at 11:45AM Jan 24, 2021Highest Observation: 4095.11 ft at 12:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 12:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 12:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 12:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 1:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 1:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 1:30PM Jan 24, 2021Observed: 4095.1 ft at 1:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 2:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 2:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 2:30PM Jan 24, 2021Observed: 4095.1 ft at 2:45PM Jan 24, 2021Observed: 4095.1 ft at 3:00PM Jan 24, 2021Observed: 4095.1 ft at 3:15PM Jan 24, 2021Observed: 4095.1 ft at 3:30PM Jan 24, 2021Observed: 4095.1 ft at 3:45PM Jan 24, 2021Observed: 4095.1 ft at 4:00PM Jan 24, 2021Observed: 4095.1 ft at 4:15PM Jan 24, 2021Observed: 4095.1 ft at 4:30PM Jan 24, 2021Observed: 4095.1 ft at 4:45PM Jan 24, 2021Observed: 4095.1 ft at 5:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 5:15PM Jan 24, 2021Observed: 4095.1 ft at 5:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 5:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 6:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 6:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 6:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 6:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 7:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 7:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 7:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 7:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 8:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 8:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 8:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 8:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 9:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 9:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 9:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 9:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 10:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 10:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 10:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 10:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 11:00PM Jan 24, 2021Highest Observation: 4095.11 ft at 11:15PM Jan 24, 2021Highest Observation: 4095.11 ft at 11:30PM Jan 24, 2021Highest Observation: 4095.11 ft at 11:45PM Jan 24, 2021Highest Observation: 4095.11 ft at 12:00AM Jan 25, 2021Highest Observation: 4095.11 ft at 12:15AM Jan 25, 2021Highest Observation: 4095.11 ft at 12:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 12:45AM Jan 25, 2021Highest Observation: 4095.11 ft at 1:00AM Jan 25, 2021Highest Observation: 4095.11 ft at 1:15AM Jan 25, 2021Highest Observation: 4095.11 ft at 1:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 1:45AM Jan 25, 2021Highest Observation: 4095.11 ft at 2:00AM Jan 25, 2021Highest Observation: 4095.11 ft at 2:15AM Jan 25, 2021Highest Observation: 4095.11 ft at 2:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 2:45AM Jan 25, 2021Highest Observation: 4095.11 ft at 3:00AM Jan 25, 2021Highest Observation: 4095.11 ft at 3:15AM Jan 25, 2021Highest Observation: 4095.11 ft at 3:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 3:45AM Jan 25, 2021Observed: 4095.1 ft at 4:00AM Jan 25, 2021Highest Observation: 4095.11 ft at 4:15AM Jan 25, 2021Highest Observation: 4095.11 ft at 4:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 4:45AM Jan 25, 2021Highest Observation: 4095.11 ft at 5:00AM Jan 25, 2021Highest Observation: 4095.11 ft at 5:15AM Jan 25, 2021Highest Observation: 4095.11 ft at 5:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 5:45AM Jan 25, 2021Highest Observation: 4095.11 ft at 6:00AM Jan 25, 2021Observed: 4095.1 ft at 6:15AM Jan 25, 2021Observed: 4095.1 ft at 6:30AM Jan 25, 2021Observed: 4095.1 ft at 6:45AM Jan 25, 2021Observed: 4095.1 ft at 7:00AM Jan 25, 2021Observed: 4095.1 ft at 7:15AM Jan 25, 2021Observed: 4095.1 ft at 7:30AM Jan 25, 2021Observed: 4095.1 ft at 7:45AM Jan 25, 2021Observed: 4095.1 ft at 8:00AM Jan 25, 2021Observed: 4095.1 ft at 8:15AM Jan 25, 2021Observed: 4095.1 ft at 8:30AM Jan 25, 2021Observed: 4095.1 ft at 8:45AM Jan 25, 2021Observed: 4095.1 ft at 9:00AM Jan 25, 2021Observed: 4095.1 ft at 9:15AM Jan 25, 2021Observed: 4095.1 ft at 9:30AM Jan 25, 2021Observed: 4095.1 ft at 9:45AM Jan 25, 2021Observed: 4095.1 ft at 10:00AM Jan 25, 2021Observed: 4095.1 ft at 10:15AM Jan 25, 2021Observed: 4095.1 ft at 10:30AM Jan 25, 2021Highest Observation: 4095.11 ft at 10:45AM Jan 25, 2021Highest Observation: 4095.11 ft at 11:00AM Jan 25, 2021Observed: 4095.1 ft at 11:15AM Jan 25, 2021Observed: 4095.1 ft at 11:30AM Jan 25, 2021Observed: 4095.1 ft at 11:45AM Jan 25, 2021Observed: 4095.1 ft at 12:00PM Jan 25, 2021Observed: 4095.1 ft at 12:15PM Jan 25, 2021Observed: 4095.1 ft at 12:30PM Jan 25, 2021Observed: 4095.1 ft at 12:45PM Jan 25, 2021Observed: 4095.1 ft at 1:00PM Jan 25, 2021Observed: 4095.1 ft at 1:15PM Jan 25, 2021Observed: 4095.1 ft at 1:30PM Jan 25, 2021Observed: 4095.1 ft at 1:45PM Jan 25, 2021Observed: 4095.1 ft at 2:00PM Jan 25, 2021Observed: 4095.1 ft at 2:15PM Jan 25, 2021Observed: 4095.1 ft at 2:30PM Jan 25, 2021Observed: 4095.1 ft at 2:45PM Jan 25, 2021Observed: 4095.1 ft at 3:00PM Jan 25, 2021Observed: 4095.1 ft at 3:15PM Jan 25, 2021Observed: 4095.1 ft at 3:30PM Jan 25, 2021Observed: 4095.1 ft at 3:45PM Jan 25, 2021Observed: 4095.1 ft at 4:00PM Jan 25, 2021Observed: 4095.1 ft at 4:15PM Jan 25, 2021Observed: 4095.09 ft at 4:30PM Jan 25, 2021Observed: 4095.1 ft at 4:45PM Jan 25, 2021Observed: 4095.1 ft at 5:00PM Jan 25, 2021Observed: 4095.1 ft at 5:15PM Jan 25, 2021Observed: 4095.1 ft at 5:30PM Jan 25, 2021Observed: 4095.1 ft at 5:45PM Jan 25, 2021Observed: 4095.1 ft at 6:00PM Jan 25, 2021Observed: 4095.1 ft at 6:15PM Jan 25, 2021Observed: 4095.1 ft at 6:30PM Jan 25, 2021Observed: 4095.1 ft at 6:45PM Jan 25, 2021Observed: 4095.1 ft at 7:00PM Jan 25, 2021Observed: 4095.1 ft at 7:15PM Jan 25, 2021Observed: 4095.1 ft at 7:30PM Jan 25, 2021Observed: 4095.1 ft at 7:45PM Jan 25, 2021Observed: 4095.1 ft at 8:00PM Jan 25, 2021Observed: 4095.1 ft at 8:15PM Jan 25, 2021Observed: 4095.09 ft at 8:30PM Jan 25, 2021Observed: 4095.1 ft at 8:45PM Jan 25, 2021Observed: 4095.1 ft at 9:00PM Jan 25, 2021Observed: 4095.1 ft at 9:15PM Jan 25, 2021Observed: 4095.1 ft at 9:30PM Jan 25, 2021Observed: 4095.09 ft at 9:45PM Jan 25, 2021Observed: 4095.1 ft at 10:00PM Jan 25, 2021Observed: 4095.1 ft at 10:15PM Jan 25, 2021Observed: 4095.1 ft at 10:30PM Jan 25, 2021Observed: 4095.1 ft at 10:45PM Jan 25, 2021Observed: 4095.09 ft at 11:00PM Jan 25, 2021Observed: 4095.1 ft at 11:15PM Jan 25, 2021Observed: 4095.09 ft at 11:30PM Jan 25, 2021Observed: 4095.1 ft at 11:45PM Jan 25, 2021Observed: 4095.1 ft at 12:00AM Jan 26, 2021Observed: 4095.1 ft at 12:15AM Jan 26, 2021Observed: 4095.1 ft at 12:30AM Jan 26, 2021Observed: 4095.1 ft at 12:45AM Jan 26, 2021Observed: 4095.1 ft at 1:00AM Jan 26, 2021Observed: 4095.1 ft at 1:15AM Jan 26, 2021Observed: 4095.1 ft at 1:30AM Jan 26, 2021Observed: 4095.1 ft at 1:45AM Jan 26, 2021Observed: 4095.1 ft at 2:00AM Jan 26, 2021Observed: 4095.1 ft at 2:15AM Jan 26, 2021Observed: 4095.1 ft at 2:30AM Jan 26, 2021Observed: 4095.1 ft at 2:45AM Jan 26, 2021Observed: 4095.1 ft at 3:00AM Jan 26, 2021Observed: 4095.1 ft at 3:15AM Jan 26, 2021Observed: 4095.1 ft at 3:30AM Jan 26, 2021Observed: 4095.1 ft at 3:45AM Jan 26, 2021Observed: 4095.1 ft at 4:00AM Jan 26, 2021Observed: 4095.1 ft at 4:15AM Jan 26, 2021Observed: 4095.1 ft at 4:30AM Jan 26, 2021Observed: 4095.1 ft at 4:45AM Jan 26, 2021Observed: 4095.1 ft at 5:00AM Jan 26, 2021Observed: 4095.1 ft at 5:15AM Jan 26, 2021Observed: 4095.1 ft at 5:30AM Jan 26, 2021Observed: 4095.1 ft at 5:45AM Jan 26, 2021Observed: 4095.1 ft at 6:00AM Jan 26, 2021Observed: 4095.1 ft at 6:15AM Jan 26, 2021Observed: 4095.1 ft at 6:30AM Jan 26, 2021Observed: 4095.1 ft at 6:45AM Jan 26, 2021Observed: 4095.1 ft at 7:00AM Jan 26, 2021Observed: 4095.1 ft at 7:15AM Jan 26, 2021Observed: 4095.1 ft at 7:30AM Jan 26, 2021Observed: 4095.1 ft at 7:45AM Jan 26, 2021Observed: 4095.1 ft at 8:00AM Jan 26, 2021Highest Observation: 4095.11 ft at 8:15AM Jan 26, 2021Highest Observation: 4095.11 ft at 8:30AM Jan 26, 2021Highest Observation: 4095.11 ft at 8:45AM Jan 26, 2021Highest Observation: 4095.11 ft at 9:00AM Jan 26, 2021Highest Observation: 4095.11 ft at 9:15AM Jan 26, 2021Highest Observation: 4095.11 ft at 9:30AM Jan 26, 2021Highest Observation: 4095.11 ft at 9:45AM Jan 26, 2021Highest Observation: 4095.11 ft at 10:00AM Jan 26, 2021Highest Observation: 4095.11 ft at 10:15AM Jan 26, 2021Highest Observation: 4095.11 ft at 10:30AM Jan 26, 2021Highest Observation: 4095.11 ft at 10:45AM Jan 26, 2021Highest Observation: 4095.11 ft at 11:00AM Jan 26, 2021Highest Observation: 4095.11 ft at 11:15AM Jan 26, 2021Highest Observation: 4095.11 ft at 11:30AM Jan 26, 2021Highest Observation: 4095.11 ft at 11:45AM Jan 26, 2021Highest Observation: 4095.11 ft at 12:00PM Jan 26, 2021Highest Observation: 4095.11 ft at 12:15PM Jan 26, 2021Bureau of ReclamationKEYW4(plotting HPIRG) Graph Created (12:38PM Jan 26, 2021)ObservedLatest observed value: 4095.11 ft at 12:15 PM MST 26-Jan-2021.
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About this graph
Tabular Data (UTC)
Tabular Data (MST)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.

NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts are not available for the Belle Fourche River at Keyhole Reservoir. Only observed stages are available for this point.

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Upstream Gauge - below Moorcroft Upstream Gauge Downstream Gauge Downstream Gauge - near Alva
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 4099.3
Low Stage (in feet): -9999

Historic Crests
(1) 4,101.98 ft on 03/28/2019
(2) 4,100.38 ft on 05/21/1978
(3) 4,099.55 ft on 06/27/2015
(4) 4,099.45 ft on 03/17/2012
(5) 4,099.06 ft on 06/14/1999
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 4,101.98 ft on 03/28/2019
(2) 4,096.59 ft on 06/29/2018
(3) 4,094.89 ft on 05/05/2017
(4) 4,097.15 ft on 04/23/2016
(5) 4,099.55 ft on 06/27/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4,046.35 ft on 03/09/1955
Show More Low Water Records

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
4134 Dam crest elevation.
4128.7 Normal water surface elevation.
4111.5 Top of flood control.
4099.3 Spillway crest elevation. Top of active conservation capacity.
4051 Top of inactive conservation pool.
4036 Top of dead storage pool.
Photos
(1) Keyhole Dam
(2) Keyhole Reservoir
(3) Spillway
About This Location Collapse

Latitude: 44.381944° N, Longitude: 104.779167° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available 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 4016 Not Available 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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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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