Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office Greenville-Spartanburg, SC

Southeast River Forecast Center

Hydrograph

River at a Glance

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NOTE: Forecasts are not available for the Russell Lake near Savannah River. Only observed stages are available for this point.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 505 Moderate Flood Stage: 499 Flood Stage: 485 Action Stage: 477 Low Stage (in feet): 0 Historic Crests (1) 479.79 ft on 01/17/2016 (2) 479.75 ft on 04/14/2003 (3) 479.61 ft on 07/10/2013 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 477.65 ft on 11/26/2018 (P) (2) 476.17 ft on 01/03/2017 (3) 479.79 ft on 01/17/2016 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records (1) 465.65 ft on 04/07/1984 Show More Low Water Records

Zoom Level:16 Legend FEMA Layer Gauge Location 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

If you notice any errors in the below information, please contact our Webmaster
485	AT THIS LEVEL CALHOUN FALLS STATE PARK AND DAY USE ROADS WILL BEGIN TO FLOOD. FYI...LIKELY WILL NEVER REACH THIS LEVEL. RECORD CREST IS 480 FT.
477	WATER MANAGEMENT THRESHOLD, EXPECT MORE FREQUENT INFLOW FORECASTS.
475	ALL BEACHES ON THE LAKE WILL BE CLOSED. POWER TO GAS DOCKS AND 80 OTHER SLIP DOCKS IN THE BEAVER DAM AREA WILL BE TURNED OFF. THE LOWEST WALKWAY AT THE FISHING PIER WILL BE CLOSED.
4.25	4.28 INCHES IN ONE HOUR IS 1000 YEAR RETURN PERIOD RAINFALL.
Photos (1) Calhoun Falls State Park fishing pier

About This Location

Latitude: 34.101111° N, Longitude: 82.618056° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 485 ft 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 Not Available 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: U.S. Geological Survey (USGS) Data and Site Info for Savannah River

Additional Information

GAGE IS 5 MILES NNW OF DAM - NEAR CALHOUN FALLS

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Inundation Mapping Locations

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Southeast River Forecast Center SERFC Ensemble River Forecasts Lower Mississippi River Forecast Center LMRFC Ensemble River Forecasts Hourly Precipitation Snow Information

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