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Hydrograph River at a Glance Download
Heart River near Mandan Stage (ft)Flow (kcfs)USGS--Water Resources of the United StatesMDNN8(plotting HGIR2) Graph Created (3:45AM Sep 23, 2018)ObservedLatest observed value: -0.22 ft at 9:00 AM CDT 17-Sep-2018. Flood Stage is 17 ft
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Datum: Not Available
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Heart River near Mandan are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Heart Butte Dam Upstream Gauge
Flood Categories (in feet)
Major Flood Stage: 28
Moderate Flood Stage: 23
Flood Stage: 17
Action Stage: 15
Low Stage (in feet): -9999

Historic Crests
(1) 25.75 ft on 04/04/1952
(2) 25.38 ft on 03/22/1987
(3) 24.85 ft on 03/25/1978
(4) 24.70 ft on 03/27/1943
(5) 24.21 ft on 03/23/1997
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(P): Preliminary values subject to further review.

Recent Crests
(1) 8.03 ft on 06/04/2013 (P)
(2) 5.07 ft on 03/12/2012
(3) 17.56 ft on 03/22/2011
(4) 9.37 ft on 04/01/2010
(5) 24.07 ft on 03/24/2009
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(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 08/20/1929
(2) 0.12 ft on 11/21/2002

For more information on your flood risk go to

Zoom Level:14
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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.
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28 Town of Mandan will flood due to levees downstream being topped at this level.
17 Wooded banks and lowlands west of Mandan will flood after 17 feet.
(1) Heart River near Mandan-Upstream View
(2) Heart River near Mandan-Downstream View
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Latitude: 46.833889° N, Longitude: 100.974167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 17 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 1638.7 ft 1655.7 ft 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
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Bismarck Weather Forecast Office
2301 University Drive, Building 27
Bismarck, ND 58502-1016
(701) 250-4224
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Page last modified: 21-Dec-2016 5:20 PM
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