Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 
Hydrograph River at a Glance Download
Belle Fourche River at Keyhole Reservoir Pool (ft)Observed: 4096.06 ft at 6:15AM Apr 19, 2018Observed: 4096.06 ft at 6:30AM Apr 19, 2018Observed: 4096.06 ft at 6:45AM Apr 19, 2018Observed: 4096.05 ft at 7:00AM Apr 19, 2018Observed: 4096.06 ft at 7:15AM Apr 19, 2018Observed: 4096.05 ft at 7:30AM Apr 19, 2018Observed: 4096.07 ft at 7:45AM Apr 19, 2018Observed: 4096.06 ft at 8:00AM Apr 19, 2018Observed: 4096.06 ft at 8:15AM Apr 19, 2018Observed: 4096.06 ft at 8:30AM Apr 19, 2018Observed: 4096.06 ft at 8:45AM Apr 19, 2018Observed: 4096.07 ft at 9:00AM Apr 19, 2018Observed: 4096.07 ft at 9:15AM Apr 19, 2018Observed: 4096.06 ft at 9:30AM Apr 19, 2018Observed: 4096.05 ft at 9:45AM Apr 19, 2018Observed: 4096.05 ft at 10:00AM Apr 19, 2018Observed: 4096.06 ft at 10:15AM Apr 19, 2018Observed: 4096.06 ft at 10:30AM Apr 19, 2018Observed: 4096.07 ft at 10:45AM Apr 19, 2018Observed: 4096.05 ft at 11:00AM Apr 19, 2018Observed: 4096.06 ft at 11:15AM Apr 19, 2018Observed: 4096.06 ft at 11:30AM Apr 19, 2018Observed: 4096.07 ft at 11:45AM Apr 19, 2018Observed: 4096.05 ft at 12:00PM Apr 19, 2018Observed: 4096.07 ft at 12:15PM Apr 19, 2018Observed: 4096.03 ft at 12:30PM Apr 19, 2018Highest Observation: 4096.08 ft at 12:45PM Apr 19, 2018Observed: 4096.05 ft at 1:00PM Apr 19, 2018Observed: 4096.07 ft at 1:15PM Apr 19, 2018Observed: 4096.06 ft at 1:30PM Apr 19, 2018Observed: 4096.06 ft at 1:45PM Apr 19, 2018Observed: 4096.04 ft at 2:00PM Apr 19, 2018Observed: 4096.07 ft at 2:15PM Apr 19, 2018Observed: 4096.05 ft at 2:30PM Apr 19, 2018Observed: 4096.05 ft at 2:45PM Apr 19, 2018Observed: 4096.03 ft at 3:00PM Apr 19, 2018Observed: 4096.07 ft at 3:15PM Apr 19, 2018Observed: 4096.07 ft at 3:30PM Apr 19, 2018Observed: 4096.05 ft at 3:45PM Apr 19, 2018Observed: 4096.05 ft at 4:00PM Apr 19, 2018Observed: 4096.06 ft at 4:15PM Apr 19, 2018Observed: 4096.07 ft at 4:30PM Apr 19, 2018Observed: 4096.05 ft at 4:45PM Apr 19, 2018Observed: 4096.07 ft at 5:00PM Apr 19, 2018Observed: 4096.04 ft at 5:15PM Apr 19, 2018Observed: 4096.04 ft at 5:30PM Apr 19, 2018Observed: 4096.05 ft at 5:45PM Apr 19, 2018Observed: 4096.06 ft at 6:00PM Apr 19, 2018Observed: 4096.05 ft at 6:15PM Apr 19, 2018Observed: 4096.04 ft at 6:30PM Apr 19, 2018Observed: 4096.04 ft at 6:45PM Apr 19, 2018Observed: 4096.04 ft at 7:00PM Apr 19, 2018Observed: 4096.06 ft at 7:15PM Apr 19, 2018Observed: 4096.05 ft at 7:30PM Apr 19, 2018Observed: 4096.04 ft at 7:45PM Apr 19, 2018Observed: 4096.03 ft at 8:00PM Apr 19, 2018Observed: 4096.05 ft at 8:15PM Apr 19, 2018Observed: 4096.06 ft at 8:30PM Apr 19, 2018Observed: 4096.06 ft at 8:45PM Apr 19, 2018Observed: 4096.05 ft at 9:00PM Apr 19, 2018Observed: 4096.04 ft at 9:15PM Apr 19, 2018Observed: 4096.05 ft at 9:30PM Apr 19, 2018Observed: 4096.06 ft at 9:45PM Apr 19, 2018Observed: 4096.06 ft at 10:00PM Apr 19, 2018Observed: 4096.05 ft at 10:15PM Apr 19, 2018Observed: 4096.04 ft at 10:30PM Apr 19, 2018Observed: 4096.05 ft at 10:45PM Apr 19, 2018Observed: 4096.06 ft at 11:00PM Apr 19, 2018Observed: 4096.06 ft at 11:15PM Apr 19, 2018Observed: 4096.05 ft at 11:30PM Apr 19, 2018Observed: 4096.04 ft at 11:45PM Apr 19, 2018Observed: 4096.05 ft at 12:00AM Apr 20, 2018Observed: 4096.06 ft at 12:15AM Apr 20, 2018Observed: 4096.07 ft at 12:30AM Apr 20, 2018Observed: 4096.06 ft at 12:45AM Apr 20, 2018Observed: 4096.05 ft at 1:00AM Apr 20, 2018Observed: 4096.04 ft at 1:15AM Apr 20, 2018Observed: 4096.05 ft at 1:30AM Apr 20, 2018Observed: 4096.05 ft at 1:45AM Apr 20, 2018Observed: 4096.06 ft at 2:00AM Apr 20, 2018Observed: 4096.04 ft at 2:15AM Apr 20, 2018Observed: 4096.04 ft at 2:30AM Apr 20, 2018Observed: 4096.05 ft at 2:45AM Apr 20, 2018Observed: 4096.07 ft at 3:00AM Apr 20, 2018Observed: 4096.06 ft at 3:15AM Apr 20, 2018Observed: 4096.06 ft at 3:30AM Apr 20, 2018Observed: 4096.04 ft at 3:45AM Apr 20, 2018Observed: 4096.05 ft at 4:00AM Apr 20, 2018Observed: 4096.06 ft at 4:15AM Apr 20, 2018Highest Observation: 4096.08 ft at 4:30AM Apr 20, 2018Observed: 4096.06 ft at 4:45AM Apr 20, 2018Observed: 4096.05 ft at 5:00AM Apr 20, 2018Observed: 4096.03 ft at 5:15AM Apr 20, 2018Observed: 4096.05 ft at 5:30AM Apr 20, 2018Observed: 4096.07 ft at 5:45AM Apr 20, 2018Observed: 4096.07 ft at 6:00AM Apr 20, 2018Observed: 4096.06 ft at 6:15AM Apr 20, 2018Observed: 4096.04 ft at 6:30AM Apr 20, 2018Observed: 4096.04 ft at 6:45AM Apr 20, 2018Observed: 4096.07 ft at 7:00AM Apr 20, 2018Observed: 4096.06 ft at 7:15AM Apr 20, 2018Observed: 4096.05 ft at 7:30AM Apr 20, 2018Observed: 4096.03 ft at 7:45AM Apr 20, 2018Observed: 4096.05 ft at 8:00AM Apr 20, 2018Observed: 4096.06 ft at 8:15AM Apr 20, 2018Observed: 4096.07 ft at 8:30AM Apr 20, 2018Observed: 4096.05 ft at 8:45AM Apr 20, 2018Observed: 4096.05 ft at 9:00AM Apr 20, 2018Observed: 4096.04 ft at 9:15AM Apr 20, 2018Observed: 4096.06 ft at 9:30AM Apr 20, 2018Observed: 4096.06 ft at 9:45AM Apr 20, 2018Observed: 4096.06 ft at 10:00AM Apr 20, 2018Observed: 4096.04 ft at 10:15AM Apr 20, 2018Observed: 4096.06 ft at 10:30AM Apr 20, 2018Observed: 4096.05 ft at 10:45AM Apr 20, 2018Observed: 4096.07 ft at 11:00AM Apr 20, 2018Observed: 4096.06 ft at 11:15AM Apr 20, 2018Observed: 4096.07 ft at 11:30AM Apr 20, 2018Observed: 4096.05 ft at 11:45AM Apr 20, 2018Observed: 4096.06 ft at 12:00PM Apr 20, 2018Observed: 4096.06 ft at 12:15PM Apr 20, 2018Observed: 4096.06 ft at 12:30PM Apr 20, 2018Observed: 4096.05 ft at 12:45PM Apr 20, 2018Observed: 4096.05 ft at 1:00PM Apr 20, 2018Observed: 4096.05 ft at 1:15PM Apr 20, 2018Observed: 4096.06 ft at 1:30PM Apr 20, 2018Observed: 4096.05 ft at 1:45PM Apr 20, 2018Observed: 4096.06 ft at 2:00PM Apr 20, 2018Observed: 4096.05 ft at 2:15PM Apr 20, 2018Observed: 4096.05 ft at 2:30PM Apr 20, 2018Observed: 4096.06 ft at 2:45PM Apr 20, 2018Observed: 4096.06 ft at 3:00PM Apr 20, 2018Observed: 4096.05 ft at 3:15PM Apr 20, 2018Observed: 4096.05 ft at 3:30PM Apr 20, 2018Observed: 4096.05 ft at 3:45PM Apr 20, 2018Observed: 4096.07 ft at 4:00PM Apr 20, 2018Observed: 4096.07 ft at 4:15PM Apr 20, 2018Highest Observation: 4096.08 ft at 4:30PM Apr 20, 2018Observed: 4096.06 ft at 4:45PM Apr 20, 2018Observed: 4096.06 ft at 5:00PM Apr 20, 2018Observed: 4096.07 ft at 5:15PM Apr 20, 2018Observed: 4096.05 ft at 5:30PM Apr 20, 2018Observed: 4096.06 ft at 5:45PM Apr 20, 2018Observed: 4096.05 ft at 6:00PM Apr 20, 2018Observed: 4096.06 ft at 6:15PM Apr 20, 2018Observed: 4096.05 ft at 6:30PM Apr 20, 2018Observed: 4096.06 ft at 6:45PM Apr 20, 2018Observed: 4096.04 ft at 7:00PM Apr 20, 2018Observed: 4096.05 ft at 7:15PM Apr 20, 2018Observed: 4096.05 ft at 7:30PM Apr 20, 2018Observed: 4096.06 ft at 7:45PM Apr 20, 2018Observed: 4096.05 ft at 8:00PM Apr 20, 2018Observed: 4096.07 ft at 8:15PM Apr 20, 2018Observed: 4096.04 ft at 8:30PM Apr 20, 2018Observed: 4096.06 ft at 8:45PM Apr 20, 2018Observed: 4096.05 ft at 9:00PM Apr 20, 2018Observed: 4096.06 ft at 9:15PM Apr 20, 2018Observed: 4096.04 ft at 9:30PM Apr 20, 2018Observed: 4096.06 ft at 9:45PM Apr 20, 2018Observed: 4096.05 ft at 10:00PM Apr 20, 2018Observed: 4096.06 ft at 10:15PM Apr 20, 2018Observed: 4096.06 ft at 10:30PM Apr 20, 2018Observed: 4096.05 ft at 10:45PM Apr 20, 2018Observed: 4096.05 ft at 11:00PM Apr 20, 2018Observed: 4096.06 ft at 11:15PM Apr 20, 2018Observed: 4096.05 ft at 11:30PM Apr 20, 2018Observed: 4096.05 ft at 11:45PM Apr 20, 2018Observed: 4096.05 ft at 12:00AM Apr 21, 2018Observed: 4096.05 ft at 12:15AM Apr 21, 2018Observed: 4096.06 ft at 12:30AM Apr 21, 2018Observed: 4096.06 ft at 12:45AM Apr 21, 2018Observed: 4096.06 ft at 1:00AM Apr 21, 2018Observed: 4096.05 ft at 1:15AM Apr 21, 2018Observed: 4096.06 ft at 1:30AM Apr 21, 2018Observed: 4096.06 ft at 1:45AM Apr 21, 2018Observed: 4096.06 ft at 2:00AM Apr 21, 2018Observed: 4096.06 ft at 2:15AM Apr 21, 2018Observed: 4096.05 ft at 2:30AM Apr 21, 2018Observed: 4096.06 ft at 2:45AM Apr 21, 2018Observed: 4096.06 ft at 3:00AM Apr 21, 2018Observed: 4096.06 ft at 3:15AM Apr 21, 2018Observed: 4096.06 ft at 3:30AM Apr 21, 2018Observed: 4096.06 ft at 3:45AM Apr 21, 2018Observed: 4096.06 ft at 4:00AM Apr 21, 2018Observed: 4096.05 ft at 4:15AM Apr 21, 2018Observed: 4096.05 ft at 4:30AM Apr 21, 2018Observed: 4096.06 ft at 4:45AM Apr 21, 2018Observed: 4096.06 ft at 5:00AM Apr 21, 2018Observed: 4096.06 ft at 5:15AM Apr 21, 2018Observed: 4096.05 ft at 5:30AM Apr 21, 2018Observed: 4096.05 ft at 5:45AM Apr 21, 2018Observed: 4096.05 ft at 6:00AM Apr 21, 2018Observed: 4096.06 ft at 6:15AM Apr 21, 2018Observed: 4096.06 ft at 6:30AM Apr 21, 2018Observed: 4096.05 ft at 6:45AM Apr 21, 2018Observed: 4096.05 ft at 7:00AM Apr 21, 2018Observed: 4096.05 ft at 7:15AM Apr 21, 2018Observed: 4096.06 ft at 7:30AM Apr 21, 2018Observed: 4096.06 ft at 7:45AM Apr 21, 2018Observed: 4096.06 ft at 8:00AM Apr 21, 2018Observed: 4096.06 ft at 8:15AM Apr 21, 2018Observed: 4096.05 ft at 8:30AM Apr 21, 2018Observed: 4096.06 ft at 8:45AM Apr 21, 2018Observed: 4096.05 ft at 9:00AM Apr 21, 2018Observed: 4096.06 ft at 9:15AM Apr 21, 2018Observed: 4096.05 ft at 9:30AM Apr 21, 2018Observed: 4096.06 ft at 9:45AM Apr 21, 2018Observed: 4096.05 ft at 10:00AM Apr 21, 2018Observed: 4096.05 ft at 10:15AM Apr 21, 2018Observed: 4096.05 ft at 10:30AM Apr 21, 2018Observed: 4096.06 ft at 10:45AM Apr 21, 2018Observed: 4096.05 ft at 11:00AM Apr 21, 2018Observed: 4096.05 ft at 11:15AM Apr 21, 2018Observed: 4096.06 ft at 11:30AM Apr 21, 2018Observed: 4096.05 ft at 11:45AM Apr 21, 2018Observed: 4096.06 ft at 12:00PM Apr 21, 2018Observed: 4096.06 ft at 12:15PM Apr 21, 2018Observed: 4096.06 ft at 12:30PM Apr 21, 2018Observed: 4096.04 ft at 12:45PM Apr 21, 2018Observed: 4096.05 ft at 1:00PM Apr 21, 2018Observed: 4096.05 ft at 1:15PM Apr 21, 2018Observed: 4096.05 ft at 1:30PM Apr 21, 2018Observed: 4096.06 ft at 1:45PM Apr 21, 2018Observed: 4096.05 ft at 2:00PM Apr 21, 2018Observed: 4096.05 ft at 2:15PM Apr 21, 2018Observed: 4096.06 ft at 2:30PM Apr 21, 2018Observed: 4096.06 ft at 2:45PM Apr 21, 2018Observed: 4096.06 ft at 3:00PM Apr 21, 2018Observed: 4096.06 ft at 3:15PM Apr 21, 2018Observed: 4096.05 ft at 3:30PM Apr 21, 2018Observed: 4096.05 ft at 3:45PM Apr 21, 2018Observed: 4096.06 ft at 4:00PM Apr 21, 2018Observed: 4096.06 ft at 4:15PM Apr 21, 2018Observed: 4096.06 ft at 4:30PM Apr 21, 2018Observed: 4096.05 ft at 4:45PM Apr 21, 2018Observed: 4096.05 ft at 5:00PM Apr 21, 2018Observed: 4096.05 ft at 5:15PM Apr 21, 2018Observed: 4096.06 ft at 5:30PM Apr 21, 2018Observed: 4096.05 ft at 5:45PM Apr 21, 2018Observed: 4096.05 ft at 6:00PM Apr 21, 2018Observed: 4096.05 ft at 6:15PM Apr 21, 2018Observed: 4096.06 ft at 6:30PM Apr 21, 2018Observed: 4096.06 ft at 6:45PM Apr 21, 2018Observed: 4096.06 ft at 7:00PM Apr 21, 2018Observed: 4096.05 ft at 7:15PM Apr 21, 2018Observed: 4096.05 ft at 7:30PM Apr 21, 2018Observed: 4096.05 ft at 7:45PM Apr 21, 2018Highest Observation: 4096.08 ft at 8:00PM Apr 21, 2018Observed: 4096.07 ft at 8:15PM Apr 21, 2018Observed: 4096.05 ft at 8:30PM Apr 21, 2018Observed: 4096.04 ft at 8:45PM Apr 21, 2018Observed: 4096.06 ft at 9:00PM Apr 21, 2018Observed: 4096.05 ft at 9:15PM Apr 21, 2018Observed: 4096.05 ft at 9:30PM Apr 21, 2018Observed: 4096.04 ft at 9:45PM Apr 21, 2018Observed: 4096.04 ft at 10:00PM Apr 21, 2018Observed: 4096.05 ft at 10:15PM Apr 21, 2018Observed: 4096.06 ft at 10:30PM Apr 21, 2018Observed: 4096.04 ft at 10:45PM Apr 21, 2018Observed: 4096.04 ft at 11:00PM Apr 21, 2018Observed: 4096.04 ft at 11:15PM Apr 21, 2018Observed: 4096.05 ft at 11:30PM Apr 21, 2018Observed: 4096.06 ft at 11:45PM Apr 21, 2018Observed: 4096.06 ft at 12:00AM Apr 22, 2018Observed: 4096.04 ft at 12:15AM Apr 22, 2018Observed: 4096.04 ft at 12:30AM Apr 22, 2018Observed: 4096.05 ft at 12:45AM Apr 22, 2018Observed: 4096.06 ft at 1:00AM Apr 22, 2018Observed: 4096.05 ft at 1:15AM Apr 22, 2018Observed: 4096.05 ft at 1:30AM Apr 22, 2018Observed: 4096.04 ft at 1:45AM Apr 22, 2018Observed: 4096.04 ft at 2:00AM Apr 22, 2018Observed: 4096.06 ft at 2:15AM Apr 22, 2018Observed: 4096.05 ft at 2:30AM Apr 22, 2018Observed: 4096.05 ft at 2:45AM Apr 22, 2018Observed: 4096.04 ft at 3:00AM Apr 22, 2018Observed: 4096.05 ft at 3:15AM Apr 22, 2018Observed: 4096.05 ft at 3:30AM Apr 22, 2018Observed: 4096.05 ft at 3:45AM Apr 22, 2018Observed: 4096.04 ft at 4:00AM Apr 22, 2018Observed: 4096.04 ft at 4:15AM Apr 22, 2018Observed: 4096.04 ft at 4:30AM Apr 22, 2018Observed: 4096.05 ft at 4:45AM Apr 22, 2018Observed: 4096.07 ft at 5:00AM Apr 22, 2018Observed: 4096.04 ft at 5:15AM Apr 22, 2018Bureau of ReclamationKEYW4(plotting HPIRG) Graph Created (6:07AM Apr 22, 2018)ObservedLatest observed value: 4096.04 ft at 5:15 AM MDT 22-Apr-2018.
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Belle Fourche River at Keyhole Reservoir. Only observed stages are available for this point.
Return to Area Map
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) 4,100.38 ft on 05/21/1978
(2) 4,099.58 ft on 07/02/2015 (P)
(3) 4,099.45 ft on 03/17/2012
(4) 4,099.06 ft on 06/14/1999
(5) 4,098.78 ft on 03/07/1972
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 4,099.58 ft on 07/02/2015 (P)
(2) 4,095.67 ft on 06/24/2013
(3) 4,099.45 ft on 03/17/2012
(4) 4,097.79 ft on 06/20/2011
(5) 4,090.52 ft on 06/26/2010
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: NAD83/WGS84

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:
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
Ask Questions/Webmaster
Page last modified: 21-Dec-2016 10:36 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities