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Hydrograph River at a Glance Download
Grace Coolidge Creek near Custer Stage (ft)Flow (kcfs)Highest Observation: 6.86 ft at 10:15AM Oct 15, 2021Highest Observation: 6.86 ft at 10:30AM Oct 15, 2021Observed: 6.85 ft at 10:45AM Oct 15, 2021Observed: 6.85 ft at 11:00AM Oct 15, 2021Observed: 6.85 ft at 11:15AM Oct 15, 2021Observed: 6.85 ft at 11:16AM Oct 15, 2021Observed: 6.85 ft at 11:30AM Oct 15, 2021Observed: 6.85 ft at 11:31AM Oct 15, 2021Observed: 6.85 ft at 11:45AM Oct 15, 2021Observed: 6.85 ft at 11:46AM Oct 15, 2021Observed: 6.85 ft at 12:00PM Oct 15, 2021Observed: 6.84 ft at 12:15PM Oct 15, 2021Observed: 6.85 ft at 12:30PM Oct 15, 2021Observed: 6.84 ft at 12:45PM Oct 15, 2021Observed: 6.85 ft at 1:00PM Oct 15, 2021Observed: 6.84 ft at 1:15PM Oct 15, 2021Observed: 6.84 ft at 1:30PM Oct 15, 2021Observed: 6.84 ft at 1:45PM Oct 15, 2021Observed: 6.85 ft at 2:00PM Oct 15, 2021Observed: 6.84 ft at 2:15PM Oct 15, 2021Observed: 6.84 ft at 2:30PM Oct 15, 2021Observed: 6.85 ft at 2:45PM Oct 15, 2021Observed: 6.85 ft at 3:00PM Oct 15, 2021Observed: 6.85 ft at 3:15PM Oct 15, 2021Observed: 6.85 ft at 3:30PM Oct 15, 2021Observed: 6.84 ft at 3:45PM Oct 15, 2021Observed: 6.84 ft at 4:00PM Oct 15, 2021Observed: 6.84 ft at 4:15PM Oct 15, 2021Observed: 6.84 ft at 4:30PM Oct 15, 2021Observed: 6.85 ft at 4:45PM Oct 15, 2021Observed: 6.85 ft at 5:00PM Oct 15, 2021Observed: 6.84 ft at 5:15PM Oct 15, 2021Observed: 6.85 ft at 5:30PM Oct 15, 2021Observed: 6.84 ft at 5:45PM Oct 15, 2021Observed: 6.85 ft at 6:00PM Oct 15, 2021Observed: 6.85 ft at 6:15PM Oct 15, 2021Observed: 6.84 ft at 6:30PM Oct 15, 2021Observed: 6.84 ft at 6:45PM Oct 15, 2021Observed: 6.84 ft at 7:00PM Oct 15, 2021Observed: 6.84 ft at 7:15PM Oct 15, 2021Observed: 6.84 ft at 7:16PM Oct 15, 2021Observed: 6.84 ft at 7:30PM Oct 15, 2021Observed: 6.84 ft at 7:31PM Oct 15, 2021Observed: 6.84 ft at 7:45PM Oct 15, 2021Observed: 6.84 ft at 7:46PM Oct 15, 2021Observed: 6.84 ft at 8:00PM Oct 15, 2021Observed: 6.84 ft at 8:15PM Oct 15, 2021Observed: 6.84 ft at 8:30PM Oct 15, 2021Observed: 6.85 ft at 8:45PM Oct 15, 2021Observed: 6.84 ft at 9:00PM Oct 15, 2021Observed: 6.84 ft at 9:15PM Oct 15, 2021Observed: 6.84 ft at 9:30PM Oct 15, 2021Observed: 6.84 ft at 9:45PM Oct 15, 2021Observed: 6.84 ft at 10:00PM Oct 15, 2021Observed: 6.84 ft at 10:15PM Oct 15, 2021Observed: 6.84 ft at 10:30PM Oct 15, 2021Observed: 6.84 ft at 10:45PM Oct 15, 2021Observed: 6.84 ft at 11:00PM Oct 15, 2021Observed: 6.84 ft at 11:15PM Oct 15, 2021Observed: 6.84 ft at 11:30PM Oct 15, 2021Observed: 6.85 ft at 11:45PM Oct 15, 2021Observed: 6.84 ft at 12:00AM Oct 16, 2021Observed: 6.84 ft at 12:15AM Oct 16, 2021Observed: 6.84 ft at 12:30AM Oct 16, 2021Observed: 6.84 ft at 12:45AM Oct 16, 2021Observed: 6.84 ft at 1:00AM Oct 16, 2021Observed: 6.84 ft at 1:15AM Oct 16, 2021Observed: 6.84 ft at 1:30AM Oct 16, 2021Observed: 6.84 ft at 1:45AM Oct 16, 2021Observed: 6.84 ft at 2:00AM Oct 16, 2021Observed: 6.84 ft at 2:15AM Oct 16, 2021Observed: 6.84 ft at 2:30AM Oct 16, 2021Observed: 6.84 ft at 2:45AM Oct 16, 2021Observed: 6.84 ft at 3:00AM Oct 16, 2021Observed: 6.84 ft at 3:15AM Oct 16, 2021Observed: 6.84 ft at 3:16AM Oct 16, 2021Observed: 6.84 ft at 3:30AM Oct 16, 2021Observed: 6.84 ft at 3:31AM Oct 16, 2021Observed: 6.84 ft at 3:45AM Oct 16, 2021Observed: 6.84 ft at 3:46AM Oct 16, 2021Observed: 6.84 ft at 4:00AM Oct 16, 2021Observed: 6.84 ft at 4:15AM Oct 16, 2021Observed: 6.84 ft at 4:30AM Oct 16, 2021Observed: 6.84 ft at 4:45AM Oct 16, 2021Observed: 6.84 ft at 5:00AM Oct 16, 2021Observed: 6.84 ft at 5:15AM Oct 16, 2021Observed: 6.84 ft at 5:30AM Oct 16, 2021Observed: 6.84 ft at 5:45AM Oct 16, 2021Observed: 6.84 ft at 6:00AM Oct 16, 2021Observed: 6.84 ft at 6:15AM Oct 16, 2021Observed: 6.84 ft at 6:30AM Oct 16, 2021Observed: 6.84 ft at 6:45AM Oct 16, 2021Observed: 6.84 ft at 7:00AM Oct 16, 2021Observed: 6.84 ft at 7:15AM Oct 16, 2021Observed: 6.84 ft at 7:30AM Oct 16, 2021Observed: 6.84 ft at 7:45AM Oct 16, 2021Observed: 6.85 ft at 8:00AM Oct 16, 2021Observed: 6.84 ft at 8:15AM Oct 16, 2021Observed: 6.84 ft at 8:30AM Oct 16, 2021Observed: 6.84 ft at 8:45AM Oct 16, 2021Observed: 6.84 ft at 9:00AM Oct 16, 2021Observed: 6.84 ft at 9:15AM Oct 16, 2021Observed: 6.84 ft at 9:30AM Oct 16, 2021Observed: 6.84 ft at 9:45AM Oct 16, 2021Observed: 6.84 ft at 10:00AM Oct 16, 2021Observed: 6.84 ft at 10:15AM Oct 16, 2021Observed: 6.85 ft at 10:30AM Oct 16, 2021Observed: 6.84 ft at 10:45AM Oct 16, 2021Observed: 6.84 ft at 11:00AM Oct 16, 2021Observed: 6.84 ft at 11:15AM Oct 16, 2021Observed: 6.84 ft at 11:30AM Oct 16, 2021Observed: 6.84 ft at 11:45AM Oct 16, 2021Observed: 6.84 ft at 12:00PM Oct 16, 2021Observed: 6.83 ft at 12:15PM Oct 16, 2021Observed: 6.83 ft at 12:30PM Oct 16, 2021Observed: 6.83 ft at 12:45PM Oct 16, 2021Observed: 6.84 ft at 1:00PM Oct 16, 2021Observed: 6.84 ft at 1:15PM Oct 16, 2021Observed: 6.84 ft at 1:30PM Oct 16, 2021Observed: 6.83 ft at 1:45PM Oct 16, 2021Observed: 6.84 ft at 2:00PM Oct 16, 2021Observed: 6.83 ft at 2:15PM Oct 16, 2021Observed: 6.83 ft at 2:30PM Oct 16, 2021Observed: 6.83 ft at 2:45PM Oct 16, 2021Observed: 6.83 ft at 3:00PM Oct 16, 2021Observed: 6.83 ft at 3:15PM Oct 16, 2021Observed: 6.84 ft at 3:30PM Oct 16, 2021Observed: 6.83 ft at 3:45PM Oct 16, 2021Observed: 6.83 ft at 4:00PM Oct 16, 2021Observed: 6.83 ft at 4:15PM Oct 16, 2021Observed: 6.83 ft at 4:30PM Oct 16, 2021Observed: 6.83 ft at 4:45PM Oct 16, 2021Observed: 6.84 ft at 5:00PM Oct 16, 2021Observed: 6.83 ft at 5:15PM Oct 16, 2021Observed: 6.84 ft at 5:30PM Oct 16, 2021Observed: 6.84 ft at 5:45PM Oct 16, 2021Observed: 6.83 ft at 6:00PM Oct 16, 2021Observed: 6.84 ft at 6:15PM Oct 16, 2021Observed: 6.84 ft at 6:30PM Oct 16, 2021Observed: 6.83 ft at 6:45PM Oct 16, 2021Observed: 6.84 ft at 7:00PM Oct 16, 2021Observed: 6.84 ft at 7:15PM Oct 16, 2021Observed: 6.84 ft at 7:30PM Oct 16, 2021Observed: 6.84 ft at 7:45PM Oct 16, 2021Observed: 6.83 ft at 8:00PM Oct 16, 2021Observed: 6.83 ft at 8:15PM Oct 16, 2021Observed: 6.83 ft at 8:30PM Oct 16, 2021Observed: 6.84 ft at 8:45PM Oct 16, 2021Observed: 6.83 ft at 9:00PM Oct 16, 2021Observed: 6.84 ft at 9:15PM Oct 16, 2021Observed: 6.84 ft at 9:30PM Oct 16, 2021Observed: 6.83 ft at 9:45PM Oct 16, 2021Observed: 6.84 ft at 10:00PM Oct 16, 2021Observed: 6.83 ft at 10:15PM Oct 16, 2021Observed: 6.83 ft at 10:30PM Oct 16, 2021Observed: 6.83 ft at 10:45PM Oct 16, 2021Observed: 6.83 ft at 11:00PM Oct 16, 2021Observed: 6.83 ft at 11:15PM Oct 16, 2021Observed: 6.83 ft at 11:30PM Oct 16, 2021Observed: 6.83 ft at 11:45PM Oct 16, 2021Observed: 6.83 ft at 12:00AM Oct 17, 2021Observed: 6.83 ft at 12:15AM Oct 17, 2021Observed: 6.83 ft at 12:30AM Oct 17, 2021Observed: 6.83 ft at 12:45AM Oct 17, 2021Observed: 6.83 ft at 1:00AM Oct 17, 2021Observed: 6.84 ft at 1:15AM Oct 17, 2021Observed: 6.83 ft at 1:30AM Oct 17, 2021Observed: 6.83 ft at 1:45AM Oct 17, 2021Observed: 6.83 ft at 2:00AM Oct 17, 2021Observed: 6.83 ft at 2:15AM Oct 17, 2021Observed: 6.84 ft at 2:30AM Oct 17, 2021Observed: 6.84 ft at 2:45AM Oct 17, 2021Observed: 6.83 ft at 3:00AM Oct 17, 2021Observed: 6.83 ft at 3:15AM Oct 17, 2021Observed: 6.83 ft at 3:16AM Oct 17, 2021Observed: 6.83 ft at 3:30AM Oct 17, 2021Observed: 6.83 ft at 3:31AM Oct 17, 2021Observed: 6.83 ft at 3:45AM Oct 17, 2021Observed: 6.83 ft at 3:46AM Oct 17, 2021Observed: 6.83 ft at 4:00AM Oct 17, 2021Observed: 6.83 ft at 4:15AM Oct 17, 2021Observed: 6.83 ft at 4:30AM Oct 17, 2021Observed: 6.83 ft at 4:45AM Oct 17, 2021Observed: 6.83 ft at 5:00AM Oct 17, 2021Observed: 6.83 ft at 5:15AM Oct 17, 2021Observed: 6.83 ft at 5:30AM Oct 17, 2021Observed: 6.83 ft at 5:45AM Oct 17, 2021Observed: 6.83 ft at 6:00AM Oct 17, 2021Observed: 6.83 ft at 6:15AM Oct 17, 2021Observed: 6.83 ft at 6:30AM Oct 17, 2021Observed: 6.83 ft at 6:45AM Oct 17, 2021Observed: 6.84 ft at 7:00AM Oct 17, 2021Observed: 6.84 ft at 7:15AM Oct 17, 2021Observed: 6.83 ft at 7:30AM Oct 17, 2021Observed: 6.83 ft at 7:45AM Oct 17, 2021Observed: 6.83 ft at 8:00AM Oct 17, 2021Observed: 6.83 ft at 8:15AM Oct 17, 2021Observed: 6.83 ft at 8:30AM Oct 17, 2021Observed: 6.84 ft at 8:45AM Oct 17, 2021Observed: 6.84 ft at 9:00AM Oct 17, 2021Observed: 6.84 ft at 9:15AM Oct 17, 2021Observed: 6.83 ft at 9:30AM Oct 17, 2021Observed: 6.83 ft at 9:45AM Oct 17, 2021Observed: 6.83 ft at 10:00AM Oct 17, 2021Observed: 6.83 ft at 10:15AM Oct 17, 2021Observed: 6.83 ft at 10:30AM Oct 17, 2021Observed: 6.84 ft at 10:45AM Oct 17, 2021Observed: 6.83 ft at 11:00AM Oct 17, 2021Observed: 6.83 ft at 11:15AM Oct 17, 2021Observed: 6.83 ft at 11:30AM Oct 17, 2021Observed: 6.83 ft at 11:31AM Oct 17, 2021Observed: 6.83 ft at 11:45AM Oct 17, 2021Observed: 6.83 ft at 11:46AM Oct 17, 2021Observed: 6.82 ft at 12:00PM Oct 17, 2021Observed: 6.82 ft at 12:01PM Oct 17, 2021Observed: 6.83 ft at 12:15PM Oct 17, 2021Observed: 6.83 ft at 12:30PM Oct 17, 2021Observed: 6.83 ft at 12:45PM Oct 17, 2021Observed: 6.83 ft at 1:00PM Oct 17, 2021Observed: 6.83 ft at 1:15PM Oct 17, 2021Observed: 6.83 ft at 1:30PM Oct 17, 2021Observed: 6.83 ft at 1:45PM Oct 17, 2021Observed: 6.83 ft at 2:00PM Oct 17, 2021Observed: 6.83 ft at 2:15PM Oct 17, 2021Observed: 6.83 ft at 2:30PM Oct 17, 2021Observed: 6.83 ft at 2:45PM Oct 17, 2021Observed: 6.83 ft at 3:00PM Oct 17, 2021Observed: 6.83 ft at 3:15PM Oct 17, 2021Observed: 6.83 ft at 3:30PM Oct 17, 2021Observed: 6.83 ft at 3:45PM Oct 17, 2021Observed: 6.84 ft at 4:00PM Oct 17, 2021Observed: 6.83 ft at 4:15PM Oct 17, 2021Observed: 6.84 ft at 4:30PM Oct 17, 2021Observed: 6.84 ft at 4:45PM Oct 17, 2021Observed: 6.84 ft at 5:00PM Oct 17, 2021Observed: 6.83 ft at 5:15PM Oct 17, 2021Observed: 6.83 ft at 5:30PM Oct 17, 2021Observed: 6.83 ft at 5:45PM Oct 17, 2021Observed: 6.83 ft at 6:00PM Oct 17, 2021Observed: 6.83 ft at 6:15PM Oct 17, 2021Observed: 6.82 ft at 6:30PM Oct 17, 2021Observed: 6.83 ft at 6:45PM Oct 17, 2021Observed: 6.84 ft at 7:00PM Oct 17, 2021Observed: 6.83 ft at 7:15PM Oct 17, 2021Observed: 6.83 ft at 7:30PM Oct 17, 2021Observed: 6.83 ft at 7:45PM Oct 17, 2021Observed: 6.83 ft at 8:00PM Oct 17, 2021Observed: 6.83 ft at 8:15PM Oct 17, 2021Observed: 6.83 ft at 8:30PM Oct 17, 2021Observed: 6.83 ft at 8:45PM Oct 17, 2021Observed: 6.83 ft at 9:00PM Oct 17, 2021Observed: 6.83 ft at 9:15PM Oct 17, 2021Observed: 6.83 ft at 9:30PM Oct 17, 2021Observed: 6.83 ft at 9:45PM Oct 17, 2021Observed: 6.83 ft at 10:00PM Oct 17, 2021Observed: 6.83 ft at 10:15PM Oct 17, 2021Observed: 6.83 ft at 10:30PM Oct 17, 2021Observed: 6.83 ft at 10:45PM Oct 17, 2021Observed: 6.83 ft at 11:00PM Oct 17, 2021Observed: 6.83 ft at 11:15PM Oct 17, 2021Observed: 6.83 ft at 11:30PM Oct 17, 2021Observed: 6.83 ft at 11:45PM Oct 17, 2021Observed: 6.83 ft at 12:00AM Oct 18, 2021Observed: 6.83 ft at 12:15AM Oct 18, 2021Observed: 6.83 ft at 12:30AM Oct 18, 2021Observed: 6.83 ft at 12:45AM Oct 18, 2021Observed: 6.83 ft at 1:00AM Oct 18, 2021Observed: 6.83 ft at 1:15AM Oct 18, 2021Observed: 6.83 ft at 1:30AM Oct 18, 2021Observed: 6.82 ft at 1:45AM Oct 18, 2021Observed: 6.83 ft at 2:00AM Oct 18, 2021Observed: 6.83 ft at 2:15AM Oct 18, 2021Observed: 6.83 ft at 2:30AM Oct 18, 2021Observed: 6.83 ft at 2:45AM Oct 18, 2021Observed: 6.83 ft at 3:00AM Oct 18, 2021Observed: 6.83 ft at 3:15AM Oct 18, 2021Observed: 6.83 ft at 3:30AM Oct 18, 2021Observed: 6.83 ft at 3:31AM Oct 18, 2021Observed: 6.83 ft at 3:45AM Oct 18, 2021Observed: 6.83 ft at 3:46AM Oct 18, 2021Observed: 6.83 ft at 4:00AM Oct 18, 2021Observed: 6.83 ft at 4:01AM Oct 18, 2021Observed: 6.83 ft at 4:15AM Oct 18, 2021Observed: 6.83 ft at 4:30AM Oct 18, 2021Observed: 6.83 ft at 4:45AM Oct 18, 2021Observed: 6.83 ft at 5:00AM Oct 18, 2021Observed: 6.83 ft at 5:15AM Oct 18, 2021Observed: 6.82 ft at 5:30AM Oct 18, 2021Observed: 6.83 ft at 5:45AM Oct 18, 2021Observed: 6.83 ft at 6:00AM Oct 18, 2021Observed: 6.83 ft at 6:15AM Oct 18, 2021Observed: 6.83 ft at 6:30AM Oct 18, 2021Observed: 6.83 ft at 6:45AM Oct 18, 2021Observed: 6.83 ft at 7:00AM Oct 18, 2021Observed: 6.83 ft at 7:15AM Oct 18, 2021Observed: 6.83 ft at 7:30AM Oct 18, 2021Observed: 6.83 ft at 7:45AM Oct 18, 2021Observed: 6.82 ft at 8:00AM Oct 18, 2021Observed: 6.82 ft at 8:15AM Oct 18, 2021Observed: 6.82 ft at 8:30AM Oct 18, 2021Observed: 6.82 ft at 8:45AM Oct 18, 2021Observed: 6.83 ft at 9:00AM Oct 18, 2021USGS--Water Resources of the United StatesGCOS2(plotting HGIRG) Graph Created (10:09AM Oct 18, 2021)ObservedLatest observed value: 6.83 ft at 9:00 AM MDT 18-Oct-2021. Flood Stage is 9.5 ft
Printable Image
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.
Return to Area Map
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) 7.31 ft on 05/17/2020
(2) 7.52 ft on 10/31/2019
(3) 10.67 ft on 05/28/2019
(4) 8.09 ft on 06/22/2018
(5) 7.12 ft on 07/28/2017
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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