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Hydrograph River at a Glance Download
Grace Coolidge Creek near Custer Stage (ft)Flow (kcfs)Observed: 6.74 ft at 9:15AM Aug 07, 2020Observed: 6.74 ft at 9:30AM Aug 07, 2020Observed: 6.74 ft at 9:45AM Aug 07, 2020Observed: 6.74 ft at 10:00AM Aug 07, 2020Observed: 6.74 ft at 10:15AM Aug 07, 2020Observed: 6.74 ft at 10:30AM Aug 07, 2020Observed: 6.74 ft at 10:45AM Aug 07, 2020Observed: 6.74 ft at 11:00AM Aug 07, 2020Observed: 6.74 ft at 11:15AM Aug 07, 2020Observed: 6.74 ft at 11:30AM Aug 07, 2020Observed: 6.74 ft at 11:45AM Aug 07, 2020Observed: 6.74 ft at 12:00PM Aug 07, 2020Observed: 6.73 ft at 12:15PM Aug 07, 2020Observed: 6.73 ft at 12:30PM Aug 07, 2020Observed: 6.73 ft at 12:45PM Aug 07, 2020Observed: 6.74 ft at 1:00PM Aug 07, 2020Observed: 6.73 ft at 1:15PM Aug 07, 2020Observed: 6.73 ft at 1:30PM Aug 07, 2020Observed: 6.73 ft at 1:45PM Aug 07, 2020Observed: 6.73 ft at 2:00PM Aug 07, 2020Observed: 6.73 ft at 2:15PM Aug 07, 2020Observed: 6.73 ft at 2:30PM Aug 07, 2020Observed: 6.73 ft at 2:45PM Aug 07, 2020Observed: 6.73 ft at 3:00PM Aug 07, 2020Observed: 6.73 ft at 3:15PM Aug 07, 2020Observed: 6.73 ft at 3:30PM Aug 07, 2020Observed: 6.73 ft at 3:45PM Aug 07, 2020Observed: 6.73 ft at 4:00PM Aug 07, 2020Observed: 6.73 ft at 4:15PM Aug 07, 2020Observed: 6.72 ft at 4:30PM Aug 07, 2020Observed: 6.72 ft at 4:45PM Aug 07, 2020Observed: 6.72 ft at 5:00PM Aug 07, 2020Observed: 6.72 ft at 5:15PM Aug 07, 2020Observed: 6.72 ft at 5:30PM Aug 07, 2020Observed: 6.72 ft at 5:45PM Aug 07, 2020Observed: 6.72 ft at 6:00PM Aug 07, 2020Observed: 6.72 ft at 6:15PM Aug 07, 2020Observed: 6.72 ft at 6:30PM Aug 07, 2020Observed: 6.72 ft at 6:31PM Aug 07, 2020Observed: 6.72 ft at 6:45PM Aug 07, 2020Observed: 6.72 ft at 6:46PM Aug 07, 2020Observed: 6.72 ft at 7:00PM Aug 07, 2020Observed: 6.72 ft at 7:01PM Aug 07, 2020Observed: 6.72 ft at 7:15PM Aug 07, 2020Observed: 6.72 ft at 7:30PM Aug 07, 2020Observed: 6.72 ft at 7:45PM Aug 07, 2020Observed: 6.72 ft at 8:00PM Aug 07, 2020Observed: 6.72 ft at 8:15PM Aug 07, 2020Observed: 6.72 ft at 8:30PM Aug 07, 2020Observed: 6.73 ft at 8:45PM Aug 07, 2020Observed: 6.73 ft at 9:00PM Aug 07, 2020Observed: 6.73 ft at 9:15PM Aug 07, 2020Observed: 6.73 ft at 9:30PM Aug 07, 2020Observed: 6.73 ft at 9:45PM Aug 07, 2020Observed: 6.72 ft at 10:00PM Aug 07, 2020Observed: 6.72 ft at 10:15PM Aug 07, 2020Observed: 6.73 ft at 10:30PM Aug 07, 2020Observed: 6.73 ft at 10:45PM Aug 07, 2020Observed: 6.73 ft at 11:00PM Aug 07, 2020Observed: 6.73 ft at 11:15PM Aug 07, 2020Observed: 6.72 ft at 11:30PM Aug 07, 2020Observed: 6.72 ft at 11:45PM Aug 07, 2020Observed: 6.73 ft at 12:00AM Aug 08, 2020Observed: 6.72 ft at 12:15AM Aug 08, 2020Observed: 6.72 ft at 12:30AM Aug 08, 2020Observed: 6.72 ft at 12:45AM Aug 08, 2020Observed: 6.72 ft at 1:00AM Aug 08, 2020Observed: 6.73 ft at 1:15AM Aug 08, 2020Observed: 6.73 ft at 1:30AM Aug 08, 2020Observed: 6.73 ft at 1:45AM Aug 08, 2020Observed: 6.72 ft at 2:00AM Aug 08, 2020Observed: 6.72 ft at 2:15AM Aug 08, 2020Observed: 6.73 ft at 2:30AM Aug 08, 2020Observed: 6.73 ft at 2:31AM Aug 08, 2020Observed: 6.72 ft at 2:45AM Aug 08, 2020Observed: 6.72 ft at 2:46AM Aug 08, 2020Observed: 6.73 ft at 3:00AM Aug 08, 2020Observed: 6.73 ft at 3:01AM Aug 08, 2020Observed: 6.72 ft at 3:15AM Aug 08, 2020Observed: 6.73 ft at 3:30AM Aug 08, 2020Observed: 6.73 ft at 3:45AM Aug 08, 2020Observed: 6.72 ft at 4:00AM Aug 08, 2020Observed: 6.73 ft at 4:15AM Aug 08, 2020Observed: 6.73 ft at 4:30AM Aug 08, 2020Observed: 6.72 ft at 4:45AM Aug 08, 2020Observed: 6.73 ft at 5:00AM Aug 08, 2020Observed: 6.73 ft at 5:15AM Aug 08, 2020Observed: 6.73 ft at 5:30AM Aug 08, 2020Observed: 6.72 ft at 5:45AM Aug 08, 2020Observed: 6.73 ft at 6:00AM Aug 08, 2020Observed: 6.73 ft at 6:15AM Aug 08, 2020Observed: 6.72 ft at 6:30AM Aug 08, 2020Observed: 6.73 ft at 6:45AM Aug 08, 2020Observed: 6.72 ft at 7:00AM Aug 08, 2020Observed: 6.72 ft at 7:15AM Aug 08, 2020Observed: 6.72 ft at 7:30AM Aug 08, 2020Observed: 6.73 ft at 7:45AM Aug 08, 2020Observed: 6.73 ft at 8:00AM Aug 08, 2020Observed: 6.73 ft at 8:15AM Aug 08, 2020Observed: 6.73 ft at 8:30AM Aug 08, 2020Observed: 6.73 ft at 8:45AM Aug 08, 2020Observed: 6.73 ft at 9:00AM Aug 08, 2020Observed: 6.73 ft at 9:15AM Aug 08, 2020Observed: 6.73 ft at 9:30AM Aug 08, 2020Observed: 6.73 ft at 9:45AM Aug 08, 2020Observed: 6.73 ft at 10:00AM Aug 08, 2020Observed: 6.73 ft at 10:15AM Aug 08, 2020Observed: 6.73 ft at 10:30AM Aug 08, 2020Observed: 6.73 ft at 10:31AM Aug 08, 2020Observed: 6.73 ft at 10:45AM Aug 08, 2020Observed: 6.73 ft at 10:46AM Aug 08, 2020Observed: 6.73 ft at 11:00AM Aug 08, 2020Observed: 6.73 ft at 11:01AM Aug 08, 2020Observed: 6.73 ft at 11:15AM Aug 08, 2020Observed: 6.73 ft at 11:30AM Aug 08, 2020Observed: 6.73 ft at 11:45AM Aug 08, 2020Observed: 6.73 ft at 12:00PM Aug 08, 2020Observed: 6.73 ft at 12:15PM Aug 08, 2020Observed: 6.73 ft at 12:30PM Aug 08, 2020Observed: 6.73 ft at 12:45PM Aug 08, 2020Observed: 6.73 ft at 1:00PM Aug 08, 2020Observed: 6.73 ft at 1:15PM Aug 08, 2020Observed: 6.72 ft at 1:30PM Aug 08, 2020Observed: 6.73 ft at 1:45PM Aug 08, 2020Observed: 6.72 ft at 2:00PM Aug 08, 2020Observed: 6.72 ft at 2:15PM Aug 08, 2020Observed: 6.72 ft at 2:30PM Aug 08, 2020Observed: 6.72 ft at 2:45PM Aug 08, 2020Observed: 6.72 ft at 3:00PM Aug 08, 2020Observed: 6.72 ft at 3:15PM Aug 08, 2020Observed: 6.72 ft at 3:30PM Aug 08, 2020Observed: 6.72 ft at 3:45PM Aug 08, 2020Observed: 6.72 ft at 4:00PM Aug 08, 2020Observed: 6.72 ft at 4:15PM Aug 08, 2020Observed: 6.72 ft at 4:30PM Aug 08, 2020Observed: 6.72 ft at 4:45PM Aug 08, 2020Observed: 6.72 ft at 5:00PM Aug 08, 2020Observed: 6.72 ft at 5:15PM Aug 08, 2020Observed: 6.72 ft at 5:30PM Aug 08, 2020Observed: 6.72 ft at 5:45PM Aug 08, 2020Observed: 6.72 ft at 6:00PM Aug 08, 2020Observed: 6.72 ft at 6:15PM Aug 08, 2020Observed: 6.72 ft at 6:16PM Aug 08, 2020Observed: 6.72 ft at 6:30PM Aug 08, 2020Observed: 6.72 ft at 6:31PM Aug 08, 2020Observed: 6.76 ft at 6:45PM Aug 08, 2020Observed: 6.76 ft at 6:46PM Aug 08, 2020Observed: 6.76 ft at 7:00PM Aug 08, 2020Observed: 6.79 ft at 7:15PM Aug 08, 2020Observed: 6.79 ft at 7:30PM Aug 08, 2020Observed: 6.8 ft at 7:45PM Aug 08, 2020Observed: 6.79 ft at 8:00PM Aug 08, 2020Observed: 6.8 ft at 8:15PM Aug 08, 2020Observed: 6.8 ft at 8:30PM Aug 08, 2020Observed: 6.8 ft at 8:45PM Aug 08, 2020Observed: 6.8 ft at 9:00PM Aug 08, 2020Observed: 6.8 ft at 9:15PM Aug 08, 2020Observed: 6.81 ft at 9:30PM Aug 08, 2020Observed: 6.81 ft at 9:45PM Aug 08, 2020Observed: 6.81 ft at 10:00PM Aug 08, 2020Observed: 6.81 ft at 10:15PM Aug 08, 2020Observed: 6.82 ft at 10:30PM Aug 08, 2020Observed: 6.82 ft at 10:45PM Aug 08, 2020Observed: 6.81 ft at 11:00PM Aug 08, 2020Observed: 6.81 ft at 11:15PM Aug 08, 2020Observed: 6.81 ft at 11:30PM Aug 08, 2020Observed: 6.81 ft at 11:45PM Aug 08, 2020Observed: 6.82 ft at 12:00AM Aug 09, 2020Observed: 6.82 ft at 12:15AM Aug 09, 2020Observed: 6.82 ft at 12:30AM Aug 09, 2020Observed: 6.82 ft at 12:45AM Aug 09, 2020Observed: 6.82 ft at 1:00AM Aug 09, 2020Observed: 6.82 ft at 1:15AM Aug 09, 2020Observed: 6.82 ft at 1:30AM Aug 09, 2020Observed: 6.82 ft at 1:45AM Aug 09, 2020Observed: 6.82 ft at 2:00AM Aug 09, 2020Observed: 6.82 ft at 2:15AM Aug 09, 2020Observed: 6.82 ft at 2:16AM Aug 09, 2020Observed: 6.82 ft at 2:30AM Aug 09, 2020Observed: 6.82 ft at 2:31AM Aug 09, 2020Highest Observation: 6.83 ft at 2:45AM Aug 09, 2020Highest Observation: 6.83 ft at 2:46AM Aug 09, 2020Highest Observation: 6.83 ft at 3:00AM Aug 09, 2020Highest Observation: 6.83 ft at 3:15AM Aug 09, 2020Highest Observation: 6.83 ft at 3:30AM Aug 09, 2020Highest Observation: 6.83 ft at 3:45AM Aug 09, 2020Highest Observation: 6.83 ft at 4:00AM Aug 09, 2020Highest Observation: 6.83 ft at 4:15AM Aug 09, 2020Highest Observation: 6.83 ft at 4:30AM Aug 09, 2020Highest Observation: 6.83 ft at 4:45AM Aug 09, 2020Highest Observation: 6.83 ft at 5:00AM Aug 09, 2020Observed: 6.82 ft at 5:15AM Aug 09, 2020Observed: 6.82 ft at 5:30AM Aug 09, 2020Observed: 6.82 ft at 5:45AM Aug 09, 2020Observed: 6.82 ft at 6:00AM Aug 09, 2020Observed: 6.82 ft at 6:15AM Aug 09, 2020Observed: 6.81 ft at 6:30AM Aug 09, 2020Observed: 6.82 ft at 6:45AM Aug 09, 2020Observed: 6.81 ft at 7:00AM Aug 09, 2020Observed: 6.81 ft at 7:15AM Aug 09, 2020Observed: 6.8 ft at 7:30AM Aug 09, 2020Observed: 6.8 ft at 7:45AM Aug 09, 2020Observed: 6.8 ft at 8:00AM Aug 09, 2020Observed: 6.8 ft at 8:15AM Aug 09, 2020Observed: 6.79 ft at 8:30AM Aug 09, 2020Observed: 6.79 ft at 8:45AM Aug 09, 2020Observed: 6.8 ft at 9:00AM Aug 09, 2020Observed: 6.79 ft at 9:15AM Aug 09, 2020Observed: 6.79 ft at 9:30AM Aug 09, 2020Observed: 6.79 ft at 9:45AM Aug 09, 2020Observed: 6.79 ft at 10:00AM Aug 09, 2020Observed: 6.79 ft at 10:15AM Aug 09, 2020Observed: 6.79 ft at 10:30AM Aug 09, 2020Observed: 6.79 ft at 10:45AM Aug 09, 2020Observed: 6.78 ft at 11:00AM Aug 09, 2020Observed: 6.78 ft at 11:15AM Aug 09, 2020Observed: 6.78 ft at 11:30AM Aug 09, 2020Observed: 6.78 ft at 11:45AM Aug 09, 2020Observed: 6.78 ft at 12:00PM Aug 09, 2020Observed: 6.78 ft at 12:15PM Aug 09, 2020Observed: 6.78 ft at 12:30PM Aug 09, 2020Observed: 6.78 ft at 12:45PM Aug 09, 2020Observed: 6.78 ft at 1:00PM Aug 09, 2020Observed: 6.78 ft at 1:15PM Aug 09, 2020Observed: 6.77 ft at 1:30PM Aug 09, 2020Observed: 6.78 ft at 1:45PM Aug 09, 2020Observed: 6.78 ft at 2:00PM Aug 09, 2020Observed: 6.78 ft at 2:15PM Aug 09, 2020Observed: 6.77 ft at 2:30PM Aug 09, 2020Observed: 6.77 ft at 2:45PM Aug 09, 2020Observed: 6.77 ft at 3:00PM Aug 09, 2020Observed: 6.76 ft at 3:15PM Aug 09, 2020Observed: 6.75 ft at 3:30PM Aug 09, 2020Observed: 6.75 ft at 3:45PM Aug 09, 2020Observed: 6.74 ft at 4:00PM Aug 09, 2020Observed: 6.75 ft at 4:15PM Aug 09, 2020Observed: 6.74 ft at 4:30PM Aug 09, 2020Observed: 6.74 ft at 4:45PM Aug 09, 2020Observed: 6.75 ft at 5:00PM Aug 09, 2020Observed: 6.75 ft at 5:15PM Aug 09, 2020Observed: 6.74 ft at 5:30PM Aug 09, 2020Observed: 6.75 ft at 5:45PM Aug 09, 2020Observed: 6.75 ft at 6:00PM Aug 09, 2020Observed: 6.75 ft at 6:15PM Aug 09, 2020Observed: 6.75 ft at 6:16PM Aug 09, 2020Observed: 6.75 ft at 6:30PM Aug 09, 2020Observed: 6.75 ft at 6:31PM Aug 09, 2020Observed: 6.75 ft at 6:45PM Aug 09, 2020Observed: 6.75 ft at 6:46PM Aug 09, 2020Observed: 6.75 ft at 7:00PM Aug 09, 2020Observed: 6.76 ft at 7:15PM Aug 09, 2020Observed: 6.75 ft at 7:30PM Aug 09, 2020Observed: 6.75 ft at 7:45PM Aug 09, 2020Observed: 6.76 ft at 8:00PM Aug 09, 2020Observed: 6.75 ft at 8:15PM Aug 09, 2020Observed: 6.76 ft at 8:30PM Aug 09, 2020Observed: 6.76 ft at 8:45PM Aug 09, 2020Observed: 6.76 ft at 9:00PM Aug 09, 2020Observed: 6.76 ft at 9:15PM Aug 09, 2020Observed: 6.76 ft at 9:30PM Aug 09, 2020Observed: 6.76 ft at 9:45PM Aug 09, 2020Observed: 6.76 ft at 10:00PM Aug 09, 2020Observed: 6.76 ft at 10:15PM Aug 09, 2020Observed: 6.76 ft at 10:30PM Aug 09, 2020Observed: 6.76 ft at 10:45PM Aug 09, 2020Observed: 6.76 ft at 11:00PM Aug 09, 2020Observed: 6.76 ft at 11:15PM Aug 09, 2020Observed: 6.76 ft at 11:30PM Aug 09, 2020Observed: 6.76 ft at 11:45PM Aug 09, 2020Observed: 6.76 ft at 12:00AM Aug 10, 2020Observed: 6.76 ft at 12:15AM Aug 10, 2020Observed: 6.76 ft at 12:30AM Aug 10, 2020Observed: 6.76 ft at 12:45AM Aug 10, 2020Observed: 6.76 ft at 1:00AM Aug 10, 2020Observed: 6.76 ft at 1:15AM Aug 10, 2020Observed: 6.76 ft at 1:30AM Aug 10, 2020Observed: 6.76 ft at 1:45AM Aug 10, 2020Observed: 6.76 ft at 2:00AM Aug 10, 2020Observed: 6.76 ft at 2:15AM Aug 10, 2020Observed: 6.76 ft at 2:16AM Aug 10, 2020Observed: 6.76 ft at 2:30AM Aug 10, 2020Observed: 6.76 ft at 2:31AM Aug 10, 2020Observed: 6.76 ft at 2:45AM Aug 10, 2020Observed: 6.76 ft at 2:46AM Aug 10, 2020Observed: 6.76 ft at 3:00AM Aug 10, 2020Observed: 6.76 ft at 3:15AM Aug 10, 2020Observed: 6.76 ft at 3:30AM Aug 10, 2020Observed: 6.76 ft at 3:45AM Aug 10, 2020Observed: 6.76 ft at 4:00AM Aug 10, 2020Observed: 6.76 ft at 4:15AM Aug 10, 2020Observed: 6.76 ft at 4:30AM Aug 10, 2020Observed: 6.76 ft at 4:45AM Aug 10, 2020Observed: 6.76 ft at 5:00AM Aug 10, 2020Observed: 6.76 ft at 5:15AM Aug 10, 2020Observed: 6.76 ft at 5:30AM Aug 10, 2020Observed: 6.76 ft at 5:45AM Aug 10, 2020Observed: 6.76 ft at 6:00AM Aug 10, 2020Observed: 6.76 ft at 6:15AM Aug 10, 2020Observed: 6.76 ft at 6:30AM Aug 10, 2020Observed: 6.76 ft at 6:45AM Aug 10, 2020Observed: 6.76 ft at 7:00AM Aug 10, 2020Observed: 6.76 ft at 7:15AM Aug 10, 2020Observed: 6.76 ft at 7:30AM Aug 10, 2020Observed: 6.76 ft at 7:45AM Aug 10, 2020Observed: 6.76 ft at 8:00AM Aug 10, 2020USGS--Water Resources of the United StatesGCOS2(plotting HGIRG) Graph Created (9:08AM Aug 10, 2020)ObservedLatest observed value: 6.76 ft at 8:00 AM MDT 10-Aug-2020. Flood Stage is 9.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts are not available for the Grace Coolidge Creek near Custer. Only observed stages are available for this point.
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Flood Categories (in feet)
Major Flood Stage: 11
Moderate Flood Stage: 10
Flood Stage: 9.5
Action Stage: 8
Low Stage (in feet): -9999

Historic Crests
(1) 12.76 ft on 02/09/1979
(2) 11.39 ft on 05/08/1995
(3) 10.90 ft on 06/15/1976
(4) 10.84 ft on 09/07/1989
(5) 10.67 ft on 05/28/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 10.67 ft on 05/28/2019
(2) 8.09 ft on 06/22/2018
(3) 7.12 ft on 07/28/2017
(4) 7.77 ft on 12/16/2016
(5) 7.81 ft on 05/22/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 06/05/1977
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
11 Major Flood Stage. Extensive inundation of structures and roads possible due to flooding on Grace Coolidge Creek.
10 Moderate Flood Stage. Some inundation of structures and roads along Grace Coolidge Creek.
9.5 Minor Flood Stage. Minor flooding along Grace Coolidge Creek. Low lying roads in Custer State Park may become impassable.
8.5 Grace Coolidge Creek begins to overflow roads in Custer State Park.
8 Low land flooding along the creek begins.
Photos
(1) Looking upstream
(2) Looking downstream
(3) Staff gage
About This Location Collapse

Latitude: 43.761111° N, Longitude: 103.363611° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 9.5 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 4107.04 4116.54 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:
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Hydrologic Resources Additional Resources
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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