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Hydrograph River at a Glance Download
Grace Coolidge Creek near Custer Stage (ft)Flow (kcfs)Highest Observation: 6.9 ft at 7:30AM Oct 26, 2020Observed: 6.89 ft at 7:45AM Oct 26, 2020Observed: 6.89 ft at 8:00AM Oct 26, 2020Observed: 6.89 ft at 8:02AM Oct 26, 2020Observed: 6.89 ft at 8:15AM Oct 26, 2020Observed: 6.89 ft at 8:17AM Oct 26, 2020Observed: 6.89 ft at 8:30AM Oct 26, 2020Observed: 6.89 ft at 8:32AM Oct 26, 2020Highest Observation: 6.9 ft at 8:45AM Oct 26, 2020Highest Observation: 6.9 ft at 9:00AM Oct 26, 2020Highest Observation: 6.9 ft at 9:15AM Oct 26, 2020Observed: 6.89 ft at 9:30AM Oct 26, 2020Observed: 6.88 ft at 9:45AM Oct 26, 2020Observed: 6.88 ft at 10:00AM Oct 26, 2020Observed: 6.87 ft at 10:15AM Oct 26, 2020Observed: 6.87 ft at 10:30AM Oct 26, 2020Observed: 6.88 ft at 10:45AM Oct 26, 2020Observed: 6.87 ft at 11:00AM Oct 26, 2020Observed: 6.87 ft at 11:15AM Oct 26, 2020Observed: 6.88 ft at 11:30AM Oct 26, 2020Observed: 6.89 ft at 11:45AM Oct 26, 2020Observed: 6.86 ft at 12:00PM Oct 26, 2020Observed: 6.85 ft at 1:15PM Oct 26, 2020Observed: 6.86 ft at 1:30PM Oct 26, 2020Observed: 6.85 ft at 1:45PM Oct 26, 2020Observed: 6.85 ft at 2:00PM Oct 26, 2020Observed: 6.85 ft at 2:15PM Oct 26, 2020Observed: 6.84 ft at 2:30PM Oct 26, 2020Observed: 6.85 ft at 2:45PM Oct 26, 2020Observed: 6.85 ft at 3:00PM Oct 26, 2020Observed: 6.85 ft at 3:15PM Oct 26, 2020Observed: 6.85 ft at 3:30PM Oct 26, 2020Observed: 6.85 ft at 3:45PM Oct 26, 2020Observed: 6.85 ft at 4:00PM Oct 26, 2020Observed: 6.85 ft at 4:01PM Oct 26, 2020Observed: 6.85 ft at 4:15PM Oct 26, 2020Observed: 6.85 ft at 4:16PM Oct 26, 2020Observed: 6.85 ft at 4:30PM Oct 26, 2020Observed: 6.85 ft at 4:31PM Oct 26, 2020Observed: 6.85 ft at 4:45PM Oct 26, 2020Observed: 6.85 ft at 5:00PM Oct 26, 2020Observed: 6.85 ft at 5:15PM Oct 26, 2020Observed: 6.85 ft at 5:30PM Oct 26, 2020Observed: 6.85 ft at 5:45PM Oct 26, 2020Observed: 6.85 ft at 6:00PM Oct 26, 2020Observed: 6.85 ft at 6:15PM Oct 26, 2020Observed: 6.85 ft at 6:30PM Oct 26, 2020Observed: 6.85 ft at 6:45PM Oct 26, 2020Observed: 6.85 ft at 7:00PM Oct 26, 2020Observed: 6.85 ft at 7:15PM Oct 26, 2020Observed: 6.85 ft at 7:30PM Oct 26, 2020Observed: 6.85 ft at 7:45PM Oct 26, 2020Observed: 6.85 ft at 8:00PM Oct 26, 2020Observed: 6.85 ft at 8:15PM Oct 26, 2020Observed: 6.85 ft at 8:30PM Oct 26, 2020Observed: 6.85 ft at 8:45PM Oct 26, 2020Observed: 6.85 ft at 9:00PM Oct 26, 2020Observed: 6.85 ft at 9:15PM Oct 26, 2020Observed: 6.85 ft at 9:30PM Oct 26, 2020Observed: 6.85 ft at 9:45PM Oct 26, 2020Observed: 6.85 ft at 10:00PM Oct 26, 2020Observed: 6.85 ft at 10:15PM Oct 26, 2020Observed: 6.85 ft at 10:30PM Oct 26, 2020Observed: 6.85 ft at 10:45PM Oct 26, 2020Observed: 6.85 ft at 11:00PM Oct 26, 2020Observed: 6.85 ft at 11:15PM Oct 26, 2020Observed: 6.85 ft at 11:30PM Oct 26, 2020Observed: 6.85 ft at 11:45PM Oct 26, 2020Observed: 6.86 ft at 12:00AM Oct 27, 2020Observed: 6.86 ft at 12:01AM Oct 27, 2020Observed: 6.87 ft at 12:15AM Oct 27, 2020Observed: 6.87 ft at 12:16AM Oct 27, 2020Observed: 6.88 ft at 12:30AM Oct 27, 2020Observed: 6.88 ft at 12:31AM Oct 27, 2020Observed: 6.88 ft at 12:45AM Oct 27, 2020Observed: 6.89 ft at 1:00AM Oct 27, 2020Observed: 6.89 ft at 1:15AM Oct 27, 2020Observed: 6.89 ft at 1:30AM Oct 27, 2020Observed: 6.89 ft at 1:45AM Oct 27, 2020Observed: 6.88 ft at 2:00AM Oct 27, 2020Observed: 6.89 ft at 2:15AM Oct 27, 2020Observed: 6.89 ft at 2:30AM Oct 27, 2020Observed: 6.89 ft at 2:45AM Oct 27, 2020Observed: 6.89 ft at 3:00AM Oct 27, 2020Observed: 6.89 ft at 3:15AM Oct 27, 2020Observed: 6.89 ft at 3:30AM Oct 27, 2020Observed: 6.89 ft at 3:45AM Oct 27, 2020Observed: 6.89 ft at 4:00AM Oct 27, 2020Observed: 6.89 ft at 4:15AM Oct 27, 2020Observed: 6.89 ft at 4:30AM Oct 27, 2020Observed: 6.88 ft at 4:45AM Oct 27, 2020Observed: 6.88 ft at 5:00AM Oct 27, 2020Observed: 6.89 ft at 5:15AM Oct 27, 2020Observed: 6.89 ft at 5:30AM Oct 27, 2020Observed: 6.89 ft at 5:45AM Oct 27, 2020Observed: 6.89 ft at 6:00AM Oct 27, 2020Observed: 6.89 ft at 6:15AM Oct 27, 2020Observed: 6.89 ft at 6:30AM Oct 27, 2020Observed: 6.89 ft at 6:45AM Oct 27, 2020Observed: 6.89 ft at 7:00AM Oct 27, 2020Observed: 6.89 ft at 7:15AM Oct 27, 2020Observed: 6.89 ft at 7:30AM Oct 27, 2020Highest Observation: 6.9 ft at 7:45AM Oct 27, 2020Highest Observation: 6.9 ft at 8:00AM Oct 27, 2020Highest Observation: 6.9 ft at 8:15AM Oct 27, 2020Highest Observation: 6.9 ft at 8:16AM Oct 27, 2020Highest Observation: 6.9 ft at 8:30AM Oct 27, 2020Highest Observation: 6.9 ft at 8:31AM Oct 27, 2020Highest Observation: 6.9 ft at 8:45AM Oct 27, 2020Highest Observation: 6.9 ft at 8:46AM Oct 27, 2020Highest Observation: 6.9 ft at 9:00AM Oct 27, 2020Highest Observation: 6.9 ft at 9:15AM Oct 27, 2020Observed: 6.87 ft at 9:30AM Oct 27, 2020Observed: 6.86 ft at 9:45AM Oct 27, 2020Observed: 6.87 ft at 10:00AM Oct 27, 2020Observed: 6.86 ft at 10:15AM Oct 27, 2020Observed: 6.85 ft at 10:30AM Oct 27, 2020Observed: 6.86 ft at 10:45AM Oct 27, 2020Observed: 6.84 ft at 11:00AM Oct 27, 2020Observed: 6.84 ft at 11:15AM Oct 27, 2020Observed: 6.84 ft at 11:30AM Oct 27, 2020Observed: 6.84 ft at 11:45AM Oct 27, 2020Observed: 6.84 ft at 12:00PM Oct 27, 2020Observed: 6.85 ft at 12:15PM Oct 27, 2020Observed: 6.84 ft at 12:30PM Oct 27, 2020Observed: 6.84 ft at 12:45PM Oct 27, 2020Observed: 6.83 ft at 1:00PM Oct 27, 2020Observed: 6.83 ft at 1:15PM Oct 27, 2020Observed: 6.83 ft at 1:30PM Oct 27, 2020Observed: 6.83 ft at 1:45PM Oct 27, 2020Observed: 6.83 ft at 2:00PM Oct 27, 2020Observed: 6.82 ft at 2:15PM Oct 27, 2020Observed: 6.83 ft at 2:30PM Oct 27, 2020Observed: 6.83 ft at 2:45PM Oct 27, 2020Observed: 6.83 ft at 3:00PM Oct 27, 2020Observed: 6.84 ft at 3:15PM Oct 27, 2020Observed: 6.84 ft at 3:30PM Oct 27, 2020Observed: 6.84 ft at 3:45PM Oct 27, 2020Observed: 6.84 ft at 4:00PM Oct 27, 2020Observed: 6.84 ft at 4:15PM Oct 27, 2020Observed: 6.84 ft at 4:30PM Oct 27, 2020Observed: 6.84 ft at 4:45PM Oct 27, 2020Observed: 6.84 ft at 5:00PM Oct 27, 2020Observed: 6.84 ft at 5:15PM Oct 27, 2020Observed: 6.84 ft at 5:30PM Oct 27, 2020Observed: 6.85 ft at 5:45PM Oct 27, 2020Observed: 6.84 ft at 6:00PM Oct 27, 2020Observed: 6.85 ft at 6:15PM Oct 27, 2020Observed: 6.85 ft at 6:30PM Oct 27, 2020Observed: 6.85 ft at 6:45PM Oct 27, 2020Observed: 6.85 ft at 7:00PM Oct 27, 2020Observed: 6.85 ft at 7:15PM Oct 27, 2020Observed: 6.85 ft at 7:30PM Oct 27, 2020Observed: 6.85 ft at 7:45PM Oct 27, 2020Observed: 6.85 ft at 8:00PM Oct 27, 2020Observed: 6.85 ft at 8:15PM Oct 27, 2020Observed: 6.85 ft at 8:30PM Oct 27, 2020Observed: 6.85 ft at 8:45PM Oct 27, 2020Observed: 6.85 ft at 9:00PM Oct 27, 2020Observed: 6.85 ft at 9:15PM Oct 27, 2020Observed: 6.85 ft at 9:30PM Oct 27, 2020Observed: 6.85 ft at 9:45PM Oct 27, 2020Observed: 6.85 ft at 10:00PM Oct 27, 2020Observed: 6.85 ft at 10:15PM Oct 27, 2020Observed: 6.85 ft at 10:30PM Oct 27, 2020Observed: 6.85 ft at 10:45PM Oct 27, 2020Observed: 6.85 ft at 11:00PM Oct 27, 2020Observed: 6.85 ft at 11:15PM Oct 27, 2020Observed: 6.85 ft at 11:30PM Oct 27, 2020Observed: 6.85 ft at 11:45PM Oct 27, 2020Observed: 6.85 ft at 12:00AM Oct 28, 2020Observed: 6.85 ft at 12:15AM Oct 28, 2020Observed: 6.85 ft at 12:30AM Oct 28, 2020Observed: 6.85 ft at 12:45AM Oct 28, 2020Observed: 6.85 ft at 1:00AM Oct 28, 2020Observed: 6.85 ft at 1:15AM Oct 28, 2020Observed: 6.85 ft at 1:30AM Oct 28, 2020Observed: 6.85 ft at 1:45AM Oct 28, 2020Observed: 6.85 ft at 2:00AM Oct 28, 2020Observed: 6.85 ft at 2:15AM Oct 28, 2020Observed: 6.85 ft at 2:30AM Oct 28, 2020Observed: 6.85 ft at 2:45AM Oct 28, 2020Observed: 6.85 ft at 3:00AM Oct 28, 2020Observed: 6.85 ft at 3:15AM Oct 28, 2020Observed: 6.85 ft at 3:30AM Oct 28, 2020Observed: 6.85 ft at 3:45AM Oct 28, 2020Observed: 6.85 ft at 4:00AM Oct 28, 2020Observed: 6.85 ft at 4:15AM Oct 28, 2020Observed: 6.86 ft at 4:30AM Oct 28, 2020Observed: 6.86 ft at 4:45AM Oct 28, 2020Observed: 6.85 ft at 5:00AM Oct 28, 2020Observed: 6.85 ft at 5:15AM Oct 28, 2020Observed: 6.85 ft at 5:30AM Oct 28, 2020Observed: 6.85 ft at 5:45AM Oct 28, 2020Observed: 6.86 ft at 6:00AM Oct 28, 2020Observed: 6.86 ft at 6:15AM Oct 28, 2020Observed: 6.85 ft at 6:30AM Oct 28, 2020Observed: 6.86 ft at 6:45AM Oct 28, 2020Observed: 6.86 ft at 7:00AM Oct 28, 2020Observed: 6.86 ft at 7:15AM Oct 28, 2020Observed: 6.85 ft at 7:30AM Oct 28, 2020Observed: 6.86 ft at 7:45AM Oct 28, 2020Observed: 6.85 ft at 8:00AM Oct 28, 2020Observed: 6.86 ft at 8:15AM Oct 28, 2020Observed: 6.86 ft at 8:16AM Oct 28, 2020Observed: 6.85 ft at 8:30AM Oct 28, 2020Observed: 6.85 ft at 8:31AM Oct 28, 2020Observed: 6.86 ft at 8:45AM Oct 28, 2020Observed: 6.86 ft at 8:46AM Oct 28, 2020Observed: 6.85 ft at 9:00AM Oct 28, 2020Observed: 6.86 ft at 9:15AM Oct 28, 2020Observed: 6.86 ft at 9:30AM Oct 28, 2020Observed: 6.85 ft at 9:45AM Oct 28, 2020Observed: 6.85 ft at 10:00AM Oct 28, 2020Observed: 6.86 ft at 10:15AM Oct 28, 2020Observed: 6.85 ft at 10:30AM Oct 28, 2020Observed: 6.85 ft at 10:45AM Oct 28, 2020Observed: 6.85 ft at 11:00AM Oct 28, 2020Observed: 6.86 ft at 11:15AM Oct 28, 2020Observed: 6.85 ft at 11:30AM Oct 28, 2020Observed: 6.86 ft at 11:45AM Oct 28, 2020Observed: 6.86 ft at 12:00PM Oct 28, 2020Observed: 6.86 ft at 12:15PM Oct 28, 2020Observed: 6.86 ft at 12:30PM Oct 28, 2020Observed: 6.86 ft at 12:45PM Oct 28, 2020Observed: 6.86 ft at 1:00PM Oct 28, 2020Observed: 6.86 ft at 1:15PM Oct 28, 2020Observed: 6.86 ft at 1:30PM Oct 28, 2020Observed: 6.86 ft at 1:45PM Oct 28, 2020Observed: 6.86 ft at 2:00PM Oct 28, 2020Observed: 6.86 ft at 2:15PM Oct 28, 2020Observed: 6.86 ft at 2:30PM Oct 28, 2020Observed: 6.86 ft at 2:45PM Oct 28, 2020Observed: 6.86 ft at 3:00PM Oct 28, 2020Observed: 6.86 ft at 3:15PM Oct 28, 2020Observed: 6.86 ft at 3:30PM Oct 28, 2020Observed: 6.86 ft at 3:45PM Oct 28, 2020Observed: 6.86 ft at 4:00PM Oct 28, 2020Observed: 6.86 ft at 4:15PM Oct 28, 2020Observed: 6.86 ft at 4:30PM Oct 28, 2020Observed: 6.86 ft at 4:45PM Oct 28, 2020Observed: 6.86 ft at 5:00PM Oct 28, 2020Observed: 6.87 ft at 5:15PM Oct 28, 2020Observed: 6.86 ft at 5:30PM Oct 28, 2020Observed: 6.86 ft at 5:45PM Oct 28, 2020Observed: 6.86 ft at 6:00PM Oct 28, 2020Observed: 6.86 ft at 6:15PM Oct 28, 2020Observed: 6.87 ft at 6:30PM Oct 28, 2020Observed: 6.86 ft at 6:45PM Oct 28, 2020Observed: 6.87 ft at 7:00PM Oct 28, 2020Observed: 6.86 ft at 7:15PM Oct 28, 2020Observed: 6.86 ft at 7:30PM Oct 28, 2020Observed: 6.86 ft at 7:45PM Oct 28, 2020Observed: 6.86 ft at 8:00PM Oct 28, 2020Observed: 6.86 ft at 8:15PM Oct 28, 2020Observed: 6.86 ft at 8:30PM Oct 28, 2020Observed: 6.87 ft at 8:45PM Oct 28, 2020Observed: 6.87 ft at 9:00PM Oct 28, 2020Observed: 6.87 ft at 9:15PM Oct 28, 2020Observed: 6.86 ft at 9:30PM Oct 28, 2020Observed: 6.86 ft at 9:45PM Oct 28, 2020Observed: 6.87 ft at 10:00PM Oct 28, 2020Observed: 6.87 ft at 10:15PM Oct 28, 2020Observed: 6.87 ft at 10:30PM Oct 28, 2020Observed: 6.87 ft at 10:45PM Oct 28, 2020Observed: 6.87 ft at 11:00PM Oct 28, 2020Observed: 6.87 ft at 11:15PM Oct 28, 2020Observed: 6.87 ft at 11:30PM Oct 28, 2020Observed: 6.87 ft at 11:45PM Oct 28, 2020Observed: 6.87 ft at 12:00AM Oct 29, 2020Observed: 6.87 ft at 12:15AM Oct 29, 2020Observed: 6.87 ft at 12:30AM Oct 29, 2020Observed: 6.87 ft at 12:45AM Oct 29, 2020Observed: 6.87 ft at 1:00AM Oct 29, 2020Observed: 6.87 ft at 1:15AM Oct 29, 2020Observed: 6.87 ft at 1:30AM Oct 29, 2020Observed: 6.86 ft at 1:45AM Oct 29, 2020Observed: 6.86 ft at 2:00AM Oct 29, 2020Observed: 6.87 ft at 2:15AM Oct 29, 2020Observed: 6.87 ft at 2:30AM Oct 29, 2020Observed: 6.87 ft at 2:45AM Oct 29, 2020Observed: 6.87 ft at 3:00AM Oct 29, 2020Observed: 6.87 ft at 3:15AM Oct 29, 2020Observed: 6.87 ft at 3:30AM Oct 29, 2020Observed: 6.87 ft at 3:45AM Oct 29, 2020Observed: 6.87 ft at 4:00AM Oct 29, 2020Observed: 6.87 ft at 4:15AM Oct 29, 2020Observed: 6.87 ft at 4:30AM Oct 29, 2020Observed: 6.87 ft at 4:45AM Oct 29, 2020Observed: 6.86 ft at 5:00AM Oct 29, 2020Observed: 6.87 ft at 5:15AM Oct 29, 2020Observed: 6.87 ft at 5:30AM Oct 29, 2020Observed: 6.86 ft at 5:45AM Oct 29, 2020Observed: 6.86 ft at 6:00AM Oct 29, 2020USGS--Water Resources of the United StatesGCOS2(plotting HGIRG) Graph Created (7:23AM Oct 29, 2020)ObservedLatest observed value: 6.86 ft at 6:00 AM MDT 29-Oct-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.
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) 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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Page last modified: 1-Mar-2019 12:33 AM
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