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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 Rapid Creek at Pactola Reservoir. Only observed stages are available for this point.
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Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 4580.2
Low Stage (in feet): -9999

Historic Crests
(1) 4,589.46 ft on 06/29/2015
(2) 4,588.63 ft on 06/05/2019
(3) 4,585.87 ft on 05/19/1965
(4) 4,585.44 ft on 05/21/1978
(5) 4,585.35 ft on 06/04/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 4,588.63 ft on 06/05/2019
(2) 4,581.08 ft on 05/30/2018
(3) 4,580.27 ft on 06/12/2017
(4) 4,580.22 ft on 05/30/2016
(5) 4,589.46 ft on 06/29/2015
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4,449.84 ft on 10/01/1956
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
4655 Dam Crest Elevation
4651.7 Elevation that would produce max discharge through the spillway, 245K cfs.
4621.5 Reservoir capacity 99K acre ft. Top of flood control zone or when uncontrolled flow over spillway begins.
4590 This would be a record high pool elevation
4585 Flooding of timber stands adjacent to the reservoir and the marina and other developed recreation facilities on the reservoir.
4580.2 Normal Pool Elevation - Top of Active Conservation
4456.1 Top of Inactive Conservation
4440 Top of Dead Pool
(1) Pactola Dam
(2) Another view of Pactola Dam
(3) Looking east from Pactola Dam
(4) Pactola Reservoir
(5) Emergency spillway
(6) Pactola Dam outlets

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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