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Advanced Hydrologic Prediction Service
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This probabilistic forecast is issued by the Missouri Basin River Forecast Center.
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About this graph
Forecasts are not available for the Grand River (SD) at Shadehill Reservoir. Only observed stages are available for this point.
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Downstream Gauge Downstream Gauge - near Little Eagle
Zoom Level:10
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 2272
Low Stage (in feet): -9999

Historic Crests
(1) 2,297.86 ft on 04/10/1952
(2) 2,290.83 ft on 04/17/2009
(3) 2,283.98 ft on 03/29/2019
(4) 2,282.42 ft on 04/02/1978
(5) 2,280.01 ft on 03/24/1997
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(P): Preliminary values subject to further review.

Recent Crests
(1) 2,283.98 ft on 03/29/2019
(2) 2,272.24 ft on 05/24/2018
(3) 2,266.31 ft on 05/01/2017
(4) 2,270.40 ft on 10/01/2015
(5) 2,271.91 ft on 10/05/2014
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2,257.30 ft on 03/05/2008
Show More Low Water Records
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Gauge LocationGauge Map Marker
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
2318 Dam crest elevation.
2297.9 Near record flooding with similar flooding to what occurred in 1950 before the reservoir was completed.
2290.83 Reservoir elevation on April 17, 2009.
2280 Water begins to impact the road to the Shadehill Recreation Area.
2272 Water begins flowing into an uncontrolled outlet and is discharged downstream.
2260 Top of active conservation pool.
2253.4 Top of inactive conservation pool.
2250.8 Top of dead storage pool.
2220 Streambed elevation at dam axis.
(1) Shadehill Dam
(2) Looking downstream
(3) Shadehill Reservoir
(4) Spillway

Other Real-time and/or Archive Data Sources:

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
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