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Hydrograph River at a Glance Download
Cheyenne River near Angostura Reservoir Pool (ft)Observed: 3174.56 ft at 7:00PM Mar 21, 2023Observed: 3174.58 ft at 7:15PM Mar 21, 2023Observed: 3174.59 ft at 7:30PM Mar 21, 2023Observed: 3174.6 ft at 7:45PM Mar 21, 2023Observed: 3174.59 ft at 8:00PM Mar 21, 2023Observed: 3174.58 ft at 8:15PM Mar 21, 2023Observed: 3174.6 ft at 8:30PM Mar 21, 2023Observed: 3174.58 ft at 8:45PM Mar 21, 2023Observed: 3174.59 ft at 9:00PM Mar 21, 2023Observed: 3174.6 ft at 9:15PM Mar 21, 2023Observed: 3174.59 ft at 9:30PM Mar 21, 2023Observed: 3174.58 ft at 9:45PM Mar 21, 2023Observed: 3174.59 ft at 10:00PM Mar 21, 2023Observed: 3174.6 ft at 10:15PM Mar 21, 2023Observed: 3174.6 ft at 10:30PM Mar 21, 2023Observed: 3174.58 ft at 10:45PM Mar 21, 2023Observed: 3174.6 ft at 11:00PM Mar 21, 2023Observed: 3174.59 ft at 11:15PM Mar 21, 2023Observed: 3174.6 ft at 11:30PM Mar 21, 2023Observed: 3174.59 ft at 11:45PM Mar 21, 2023Observed: 3174.61 ft at 12:00AM Mar 22, 2023Observed: 3174.58 ft at 12:15AM Mar 22, 2023Observed: 3174.61 ft at 12:30AM Mar 22, 2023Observed: 3174.6 ft at 12:45AM Mar 22, 2023Observed: 3174.62 ft at 1:00AM Mar 22, 2023Observed: 3174.61 ft at 1:15AM Mar 22, 2023Observed: 3174.61 ft at 1:30AM Mar 22, 2023Observed: 3174.61 ft at 1:45AM Mar 22, 2023Observed: 3174.61 ft at 2:00AM Mar 22, 2023Observed: 3174.61 ft at 2:15AM Mar 22, 2023Observed: 3174.61 ft at 2:30AM Mar 22, 2023Observed: 3174.61 ft at 2:45AM Mar 22, 2023Observed: 3174.61 ft at 3:00AM Mar 22, 2023Observed: 3174.61 ft at 3:15AM Mar 22, 2023Observed: 3174.61 ft at 3:30AM Mar 22, 2023Observed: 3174.61 ft at 3:45AM Mar 22, 2023Observed: 3174.63 ft at 4:15AM Mar 22, 2023Observed: 3174.62 ft at 4:30AM Mar 22, 2023Observed: 3174.62 ft at 4:45AM Mar 22, 2023Observed: 3174.63 ft at 5:00AM Mar 22, 2023Observed: 3174.63 ft at 5:15AM Mar 22, 2023Observed: 3174.63 ft at 5:30AM Mar 22, 2023Observed: 3174.63 ft at 5:45AM Mar 22, 2023Observed: 3174.63 ft at 6:00AM Mar 22, 2023Observed: 3174.63 ft at 6:15AM Mar 22, 2023Observed: 3174.64 ft at 6:30AM Mar 22, 2023Observed: 3174.63 ft at 6:45AM Mar 22, 2023Observed: 3174.64 ft at 7:00AM Mar 22, 2023Observed: 3174.64 ft at 7:15AM Mar 22, 2023Observed: 3174.64 ft at 7:30AM Mar 22, 2023Observed: 3174.63 ft at 7:45AM Mar 22, 2023Observed: 3174.65 ft at 8:00AM Mar 22, 2023Observed: 3174.64 ft at 8:15AM Mar 22, 2023Observed: 3174.65 ft at 8:30AM Mar 22, 2023Observed: 3174.64 ft at 8:45AM Mar 22, 2023Observed: 3174.65 ft at 9:00AM Mar 22, 2023Observed: 3174.64 ft at 9:15AM Mar 22, 2023Observed: 3174.65 ft at 9:30AM Mar 22, 2023Observed: 3174.65 ft at 9:45AM Mar 22, 2023Observed: 3174.65 ft at 10:00AM Mar 22, 2023Observed: 3174.65 ft at 10:15AM Mar 22, 2023Observed: 3174.66 ft at 10:30AM Mar 22, 2023Observed: 3174.66 ft at 10:45AM Mar 22, 2023Observed: 3174.66 ft at 11:00AM Mar 22, 2023Observed: 3174.66 ft at 11:15AM Mar 22, 2023Observed: 3174.67 ft at 11:30AM Mar 22, 2023Observed: 3174.66 ft at 11:45AM Mar 22, 2023Observed: 3174.66 ft at 12:00PM Mar 22, 2023Observed: 3174.67 ft at 12:15PM Mar 22, 2023Observed: 3174.68 ft at 12:30PM Mar 22, 2023Observed: 3174.67 ft at 12:45PM Mar 22, 2023Observed: 3174.67 ft at 1:00PM Mar 22, 2023Observed: 3174.67 ft at 1:15PM Mar 22, 2023Observed: 3174.68 ft at 1:30PM Mar 22, 2023Observed: 3174.67 ft at 1:45PM Mar 22, 2023Observed: 3174.68 ft at 2:00PM Mar 22, 2023Observed: 3174.68 ft at 2:15PM Mar 22, 2023Observed: 3174.67 ft at 2:30PM Mar 22, 2023Observed: 3174.67 ft at 2:45PM Mar 22, 2023Observed: 3174.68 ft at 3:00PM Mar 22, 2023Observed: 3174.67 ft at 3:15PM Mar 22, 2023Observed: 3174.68 ft at 3:30PM Mar 22, 2023Observed: 3174.68 ft at 3:45PM Mar 22, 2023Observed: 3174.69 ft at 4:00PM Mar 22, 2023Observed: 3174.68 ft at 4:15PM Mar 22, 2023Observed: 3174.68 ft at 4:30PM Mar 22, 2023Observed: 3174.69 ft at 4:45PM Mar 22, 2023Observed: 3174.69 ft at 5:00PM Mar 22, 2023Observed: 3174.69 ft at 5:15PM Mar 22, 2023Observed: 3174.7 ft at 5:30PM Mar 22, 2023Observed: 3174.69 ft at 5:45PM Mar 22, 2023Observed: 3174.7 ft at 6:00PM Mar 22, 2023Observed: 3174.69 ft at 6:15PM Mar 22, 2023Observed: 3174.7 ft at 6:30PM Mar 22, 2023Observed: 3174.69 ft at 6:45PM Mar 22, 2023Observed: 3174.71 ft at 7:00PM Mar 22, 2023Observed: 3174.7 ft at 7:15PM Mar 22, 2023Observed: 3174.7 ft at 7:30PM Mar 22, 2023Observed: 3174.7 ft at 7:45PM Mar 22, 2023Observed: 3174.71 ft at 8:00PM Mar 22, 2023Observed: 3174.69 ft at 8:15PM Mar 22, 2023Observed: 3174.71 ft at 8:30PM Mar 22, 2023Observed: 3174.69 ft at 8:45PM Mar 22, 2023Observed: 3174.71 ft at 9:00PM Mar 22, 2023Observed: 3174.71 ft at 9:15PM Mar 22, 2023Observed: 3174.7 ft at 9:30PM Mar 22, 2023Observed: 3174.69 ft at 9:45PM Mar 22, 2023Observed: 3174.72 ft at 10:00PM Mar 22, 2023Observed: 3174.7 ft at 10:15PM Mar 22, 2023Observed: 3174.7 ft at 10:30PM Mar 22, 2023Observed: 3174.72 ft at 10:45PM Mar 22, 2023Observed: 3174.71 ft at 11:00PM Mar 22, 2023Observed: 3174.71 ft at 11:15PM Mar 22, 2023Observed: 3174.72 ft at 11:30PM Mar 22, 2023Observed: 3174.72 ft at 11:45PM Mar 22, 2023Observed: 3174.72 ft at 12:00AM Mar 23, 2023Observed: 3174.72 ft at 12:15AM Mar 23, 2023Observed: 3174.71 ft at 12:30AM Mar 23, 2023Observed: 3174.73 ft at 12:45AM Mar 23, 2023Observed: 3174.72 ft at 1:00AM Mar 23, 2023Observed: 3174.72 ft at 1:15AM Mar 23, 2023Observed: 3174.72 ft at 1:30AM Mar 23, 2023Observed: 3174.73 ft at 1:45AM Mar 23, 2023Observed: 3174.72 ft at 2:00AM Mar 23, 2023Observed: 3174.73 ft at 2:15AM Mar 23, 2023Observed: 3174.73 ft at 2:30AM Mar 23, 2023Observed: 3174.74 ft at 2:45AM Mar 23, 2023Observed: 3174.73 ft at 3:00AM Mar 23, 2023Observed: 3174.74 ft at 3:15AM Mar 23, 2023Observed: 3174.73 ft at 3:30AM Mar 23, 2023Observed: 3174.74 ft at 3:45AM Mar 23, 2023Observed: 3174.74 ft at 4:00AM Mar 23, 2023Observed: 3174.74 ft at 4:15AM Mar 23, 2023Observed: 3174.74 ft at 4:30AM Mar 23, 2023Observed: 3174.74 ft at 4:45AM Mar 23, 2023Observed: 3174.74 ft at 5:00AM Mar 23, 2023Observed: 3174.74 ft at 5:15AM Mar 23, 2023Observed: 3174.75 ft at 5:30AM Mar 23, 2023Observed: 3174.74 ft at 5:45AM Mar 23, 2023Observed: 3174.75 ft at 6:00AM Mar 23, 2023Observed: 3174.75 ft at 6:15AM Mar 23, 2023Observed: 3174.74 ft at 6:30AM Mar 23, 2023Observed: 3174.75 ft at 6:45AM Mar 23, 2023Observed: 3174.75 ft at 7:00AM Mar 23, 2023Observed: 3174.75 ft at 7:15AM Mar 23, 2023Observed: 3174.76 ft at 7:30AM Mar 23, 2023Observed: 3174.75 ft at 7:45AM Mar 23, 2023Observed: 3174.76 ft at 8:00AM Mar 23, 2023Observed: 3174.75 ft at 8:15AM Mar 23, 2023Observed: 3174.76 ft at 8:30AM Mar 23, 2023Observed: 3174.76 ft at 8:45AM Mar 23, 2023Observed: 3174.77 ft at 9:00AM Mar 23, 2023Observed: 3174.76 ft at 9:15AM Mar 23, 2023Observed: 3174.77 ft at 9:30AM Mar 23, 2023Observed: 3174.77 ft at 9:45AM Mar 23, 2023Observed: 3174.77 ft at 10:00AM Mar 23, 2023Observed: 3174.77 ft at 10:15AM Mar 23, 2023Observed: 3174.77 ft at 10:30AM Mar 23, 2023Observed: 3174.77 ft at 10:45AM Mar 23, 2023Observed: 3174.76 ft at 11:00AM Mar 23, 2023Observed: 3174.77 ft at 11:15AM Mar 23, 2023Observed: 3174.78 ft at 11:30AM Mar 23, 2023Observed: 3174.78 ft at 11:45AM Mar 23, 2023Observed: 3174.77 ft at 12:00PM Mar 23, 2023Observed: 3174.79 ft at 12:15PM Mar 23, 2023Observed: 3174.78 ft at 12:30PM Mar 23, 2023Observed: 3174.77 ft at 12:45PM Mar 23, 2023Observed: 3174.78 ft at 1:00PM Mar 23, 2023Observed: 3174.78 ft at 1:15PM Mar 23, 2023Observed: 3174.77 ft at 1:30PM Mar 23, 2023Observed: 3174.78 ft at 1:45PM Mar 23, 2023Observed: 3174.78 ft at 2:00PM Mar 23, 2023Observed: 3174.78 ft at 2:15PM Mar 23, 2023Observed: 3174.78 ft at 2:30PM Mar 23, 2023Observed: 3174.79 ft at 2:45PM Mar 23, 2023Observed: 3174.78 ft at 3:00PM Mar 23, 2023Observed: 3174.79 ft at 3:15PM Mar 23, 2023Observed: 3174.79 ft at 3:30PM Mar 23, 2023Observed: 3174.79 ft at 3:45PM Mar 23, 2023Observed: 3174.79 ft at 4:00PM Mar 23, 2023Observed: 3174.8 ft at 4:15PM Mar 23, 2023Observed: 3174.79 ft at 4:30PM Mar 23, 2023Observed: 3174.79 ft at 4:45PM Mar 23, 2023Observed: 3174.79 ft at 5:00PM Mar 23, 2023Observed: 3174.79 ft at 5:15PM Mar 23, 2023Observed: 3174.79 ft at 5:30PM Mar 23, 2023Observed: 3174.79 ft at 5:45PM Mar 23, 2023Observed: 3174.8 ft at 6:00PM Mar 23, 2023Observed: 3174.79 ft at 6:15PM Mar 23, 2023Observed: 3174.8 ft at 6:30PM Mar 23, 2023Observed: 3174.8 ft at 6:45PM Mar 23, 2023Observed: 3174.8 ft at 7:00PM Mar 23, 2023Observed: 3174.8 ft at 7:15PM Mar 23, 2023Observed: 3174.8 ft at 7:30PM Mar 23, 2023Observed: 3174.8 ft at 7:45PM Mar 23, 2023Observed: 3174.8 ft at 8:00PM Mar 23, 2023Observed: 3174.8 ft at 8:15PM Mar 23, 2023Observed: 3174.8 ft at 8:30PM Mar 23, 2023Observed: 3174.81 ft at 8:45PM Mar 23, 2023Observed: 3174.8 ft at 9:00PM Mar 23, 2023Observed: 3174.8 ft at 9:15PM Mar 23, 2023Observed: 3174.8 ft at 9:30PM Mar 23, 2023Observed: 3174.81 ft at 9:45PM Mar 23, 2023Observed: 3174.8 ft at 10:00PM Mar 23, 2023Observed: 3174.81 ft at 10:15PM Mar 23, 2023Observed: 3174.81 ft at 10:30PM Mar 23, 2023Observed: 3174.81 ft at 10:45PM Mar 23, 2023Observed: 3174.81 ft at 11:00PM Mar 23, 2023Observed: 3174.81 ft at 11:15PM Mar 23, 2023Observed: 3174.81 ft at 11:30PM Mar 23, 2023Observed: 3174.82 ft at 11:45PM Mar 23, 2023Observed: 3174.81 ft at 12:00AM Mar 24, 2023Observed: 3174.81 ft at 12:15AM Mar 24, 2023Observed: 3174.83 ft at 12:30AM Mar 24, 2023Observed: 3174.82 ft at 12:45AM Mar 24, 2023Observed: 3174.82 ft at 1:00AM Mar 24, 2023Observed: 3174.83 ft at 1:15AM Mar 24, 2023Observed: 3174.82 ft at 1:30AM Mar 24, 2023Observed: 3174.82 ft at 1:45AM Mar 24, 2023Observed: 3174.83 ft at 2:00AM Mar 24, 2023Observed: 3174.82 ft at 2:15AM Mar 24, 2023Observed: 3174.83 ft at 2:30AM Mar 24, 2023Observed: 3174.82 ft at 2:45AM Mar 24, 2023Observed: 3174.83 ft at 3:00AM Mar 24, 2023Observed: 3174.83 ft at 3:15AM Mar 24, 2023Observed: 3174.84 ft at 3:30AM Mar 24, 2023Observed: 3174.83 ft at 3:45AM Mar 24, 2023Observed: 3174.83 ft at 4:00AM Mar 24, 2023Observed: 3174.83 ft at 4:15AM Mar 24, 2023Observed: 3174.84 ft at 4:30AM Mar 24, 2023Observed: 3174.83 ft at 4:45AM Mar 24, 2023Observed: 3174.83 ft at 5:00AM Mar 24, 2023Observed: 3174.84 ft at 5:15AM Mar 24, 2023Observed: 3174.84 ft at 5:30AM Mar 24, 2023Observed: 3174.84 ft at 5:45AM Mar 24, 2023Observed: 3174.84 ft at 6:00AM Mar 24, 2023Observed: 3174.84 ft at 6:15AM Mar 24, 2023Observed: 3174.84 ft at 6:30AM Mar 24, 2023Observed: 3174.84 ft at 6:45AM Mar 24, 2023Observed: 3174.85 ft at 7:00AM Mar 24, 2023Observed: 3174.84 ft at 7:15AM Mar 24, 2023Observed: 3174.85 ft at 7:30AM Mar 24, 2023Observed: 3174.85 ft at 7:45AM Mar 24, 2023Observed: 3174.85 ft at 8:00AM Mar 24, 2023Observed: 3174.85 ft at 8:15AM Mar 24, 2023Observed: 3174.85 ft at 8:30AM Mar 24, 2023Observed: 3174.86 ft at 8:45AM Mar 24, 2023Observed: 3174.85 ft at 9:00AM Mar 24, 2023Observed: 3174.86 ft at 9:15AM Mar 24, 2023Observed: 3174.85 ft at 9:30AM Mar 24, 2023Observed: 3174.86 ft at 9:45AM Mar 24, 2023Observed: 3174.86 ft at 10:00AM Mar 24, 2023Observed: 3174.86 ft at 10:15AM Mar 24, 2023Observed: 3174.86 ft at 10:30AM Mar 24, 2023Observed: 3174.86 ft at 10:45AM Mar 24, 2023Observed: 3174.86 ft at 11:00AM Mar 24, 2023Observed: 3174.86 ft at 11:15AM Mar 24, 2023Observed: 3174.86 ft at 11:30AM Mar 24, 2023Observed: 3174.85 ft at 11:45AM Mar 24, 2023Observed: 3174.86 ft at 12:00PM Mar 24, 2023Observed: 3174.86 ft at 12:15PM Mar 24, 2023Observed: 3174.86 ft at 12:30PM Mar 24, 2023Observed: 3174.86 ft at 12:45PM Mar 24, 2023Observed: 3174.87 ft at 1:00PM Mar 24, 2023Observed: 3174.86 ft at 1:15PM Mar 24, 2023Observed: 3174.87 ft at 1:30PM Mar 24, 2023Observed: 3174.87 ft at 1:45PM Mar 24, 2023Observed: 3174.87 ft at 2:00PM Mar 24, 2023Observed: 3174.87 ft at 2:15PM Mar 24, 2023Observed: 3174.87 ft at 2:30PM Mar 24, 2023Observed: 3174.87 ft at 2:45PM Mar 24, 2023Observed: 3174.87 ft at 3:00PM Mar 24, 2023Observed: 3174.86 ft at 3:15PM Mar 24, 2023Observed: 3174.87 ft at 3:30PM Mar 24, 2023Observed: 3174.87 ft at 3:45PM Mar 24, 2023Observed: 3174.88 ft at 4:00PM Mar 24, 2023Observed: 3174.87 ft at 4:15PM Mar 24, 2023Observed: 3174.87 ft at 4:30PM Mar 24, 2023Observed: 3174.86 ft at 4:45PM Mar 24, 2023Observed: 3174.88 ft at 5:00PM Mar 24, 2023Observed: 3174.87 ft at 5:15PM Mar 24, 2023Observed: 3174.87 ft at 5:30PM Mar 24, 2023Observed: 3174.87 ft at 5:45PM Mar 24, 2023Highest Observation: 3174.89 ft at 6:00PM Mar 24, 2023Observed: 3174.86 ft at 6:15PM Mar 24, 2023Bureau of ReclamationANGS2(plotting HPIRG) Graph Created (6:53PM Mar 24, 2023)ObservedLatest observed value: 3174.86 ft at 6:15 PM MDT 24-Mar-2023.
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
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: Forecasts are not available for the Cheyenne River near Angostura Reservoir. Only observed stages are available for this point.

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Upstream Gauge - at Edgemont Upstream Gauge Downstream Gauge Downstream Gauge - near Buffalo Gap
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 3187.2
Low Stage (in feet): -9999

Historic Crests
(1) 3,189.37 ft on 05/20/1978
(2) 3,189.00 ft on 06/18/1962
(3) 3,188.42 ft on 05/25/1971
(4) 3,188.00 ft on 06/17/1967
(5) 3,187.91 ft on 05/27/1957
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 3,180.96 ft on 05/17/2022
(2) 3,186.78 ft on 05/24/2019
(3) 3,187.14 ft on 03/22/2019
(4) 3,186.73 ft on 05/21/2018
(5) 3,185.89 ft on 05/28/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 3,162.90 ft on 09/28/1960
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
3199 Dam crest elevation.
3198.1 Maximum Water Surface or Top of Surcharge Capacity.
3195 Discharge from the reservoir is about 120,000 cfs with automatic control; higher with high inflows and manual control.
3187.2 Top of active conservation elevation.
3163 Elevation at top of inactive storage.
3062 Streambed elevation at dam axis.
Photos
(1) Angostura Dam and Reservoir
(2) Releases from Angostura Reservoir
(3) Looking north
About This Location Collapse

Latitude: 43.343033° N, Longitude: 103.438252° 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 3058.02 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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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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