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Hydrograph River at a Glance Download
Grace Coolidge Creek near Custer Stage (ft)Flow (kcfs)Observed: 7.06 ft at 6:15PM Apr 07, 2021Observed: 7.07 ft at 6:30PM Apr 07, 2021Observed: 7.07 ft at 6:45PM Apr 07, 2021Observed: 7.07 ft at 7:00PM Apr 07, 2021Observed: 7.06 ft at 7:15PM Apr 07, 2021Observed: 7.07 ft at 7:30PM Apr 07, 2021Observed: 7.06 ft at 7:45PM Apr 07, 2021Observed: 7.06 ft at 8:00PM Apr 07, 2021Observed: 7.07 ft at 8:15PM Apr 07, 2021Observed: 7.06 ft at 8:30PM Apr 07, 2021Observed: 7.07 ft at 8:45PM Apr 07, 2021Observed: 7.07 ft at 9:00PM Apr 07, 2021Observed: 7.07 ft at 9:15PM Apr 07, 2021Observed: 7.07 ft at 9:30PM Apr 07, 2021Observed: 7.07 ft at 9:45PM Apr 07, 2021Observed: 7.07 ft at 10:00PM Apr 07, 2021Observed: 7.07 ft at 10:15PM Apr 07, 2021Observed: 7.07 ft at 10:16PM Apr 07, 2021Observed: 7.07 ft at 10:30PM Apr 07, 2021Observed: 7.07 ft at 10:31PM Apr 07, 2021Observed: 7.07 ft at 10:45PM Apr 07, 2021Observed: 7.07 ft at 10:46PM Apr 07, 2021Observed: 7.08 ft at 11:00PM Apr 07, 2021Observed: 7.07 ft at 11:15PM Apr 07, 2021Observed: 7.07 ft at 11:30PM Apr 07, 2021Observed: 7.07 ft at 11:45PM Apr 07, 2021Observed: 7.07 ft at 12:00AM Apr 08, 2021Observed: 7.06 ft at 12:15AM Apr 08, 2021Observed: 7.07 ft at 12:30AM Apr 08, 2021Observed: 7.06 ft at 12:45AM Apr 08, 2021Observed: 7.07 ft at 1:00AM Apr 08, 2021Observed: 7.07 ft at 1:15AM Apr 08, 2021Observed: 7.07 ft at 1:30AM Apr 08, 2021Observed: 7.06 ft at 1:45AM Apr 08, 2021Observed: 7.07 ft at 2:00AM Apr 08, 2021Observed: 7.06 ft at 2:15AM Apr 08, 2021Observed: 7.06 ft at 2:30AM Apr 08, 2021Observed: 7.06 ft at 2:45AM Apr 08, 2021Observed: 7.05 ft at 3:00AM Apr 08, 2021Observed: 7.06 ft at 3:15AM Apr 08, 2021Observed: 7.05 ft at 3:30AM Apr 08, 2021Observed: 7.05 ft at 3:45AM Apr 08, 2021Observed: 7.05 ft at 4:00AM Apr 08, 2021Observed: 7.04 ft at 4:15AM Apr 08, 2021Observed: 7.05 ft at 4:30AM Apr 08, 2021Observed: 7.05 ft at 4:45AM Apr 08, 2021Observed: 7.04 ft at 5:00AM Apr 08, 2021Observed: 7.04 ft at 5:15AM Apr 08, 2021Observed: 7.04 ft at 5:30AM Apr 08, 2021Observed: 7.05 ft at 5:45AM Apr 08, 2021Observed: 7.04 ft at 6:00AM Apr 08, 2021Observed: 7.05 ft at 6:15AM Apr 08, 2021Observed: 7.05 ft at 6:16AM Apr 08, 2021Observed: 7.03 ft at 6:30AM Apr 08, 2021Observed: 7.03 ft at 6:31AM Apr 08, 2021Observed: 7.04 ft at 6:45AM Apr 08, 2021Observed: 7.04 ft at 6:46AM Apr 08, 2021Observed: 7.03 ft at 7:00AM Apr 08, 2021Observed: 7.04 ft at 7:15AM Apr 08, 2021Observed: 7.04 ft at 7:30AM Apr 08, 2021Observed: 7.04 ft at 7:45AM Apr 08, 2021Observed: 7.04 ft at 8:00AM Apr 08, 2021Observed: 7.04 ft at 8:15AM Apr 08, 2021Observed: 7.04 ft at 8:30AM Apr 08, 2021Observed: 7.03 ft at 8:45AM Apr 08, 2021Observed: 7.03 ft at 9:00AM Apr 08, 2021Observed: 7.04 ft at 9:15AM Apr 08, 2021Observed: 7.03 ft at 9:30AM Apr 08, 2021Observed: 7.03 ft at 9:45AM Apr 08, 2021Observed: 7.03 ft at 10:00AM Apr 08, 2021Observed: 7.02 ft at 10:15AM Apr 08, 2021Observed: 7.03 ft at 10:30AM Apr 08, 2021Observed: 7.02 ft at 10:45AM Apr 08, 2021Observed: 7.02 ft at 11:00AM Apr 08, 2021Observed: 7.03 ft at 11:15AM Apr 08, 2021Observed: 7.02 ft at 11:30AM Apr 08, 2021Observed: 7.02 ft at 11:45AM Apr 08, 2021Observed: 7.04 ft at 12:00PM Apr 08, 2021Observed: 7.04 ft at 12:15PM Apr 08, 2021Observed: 7.03 ft at 12:30PM Apr 08, 2021Observed: 7.03 ft at 12:45PM Apr 08, 2021Observed: 7.03 ft at 1:00PM Apr 08, 2021Observed: 7.03 ft at 1:15PM Apr 08, 2021Observed: 7.03 ft at 1:30PM Apr 08, 2021Observed: 7.02 ft at 1:45PM Apr 08, 2021Observed: 7.04 ft at 2:00PM Apr 08, 2021Observed: 7.03 ft at 2:15PM Apr 08, 2021Observed: 7.04 ft at 2:30PM Apr 08, 2021Observed: 7.04 ft at 2:45PM Apr 08, 2021Observed: 7.03 ft at 3:00PM Apr 08, 2021Observed: 7.04 ft at 3:15PM Apr 08, 2021Observed: 7.04 ft at 3:30PM Apr 08, 2021Observed: 7.04 ft at 3:45PM Apr 08, 2021Observed: 7.04 ft at 4:00PM Apr 08, 2021Observed: 7.03 ft at 4:15PM Apr 08, 2021Observed: 7.05 ft at 4:30PM Apr 08, 2021Observed: 7.04 ft at 4:45PM Apr 08, 2021Observed: 7.04 ft at 5:00PM Apr 08, 2021Observed: 7.04 ft at 5:15PM Apr 08, 2021Observed: 7.05 ft at 5:30PM Apr 08, 2021Observed: 7.05 ft at 5:45PM Apr 08, 2021Observed: 7.05 ft at 6:00PM Apr 08, 2021Observed: 7.05 ft at 6:15PM Apr 08, 2021Observed: 7.05 ft at 6:30PM Apr 08, 2021Observed: 7.05 ft at 6:45PM Apr 08, 2021Observed: 7.06 ft at 7:00PM Apr 08, 2021Observed: 7.06 ft at 7:15PM Apr 08, 2021Observed: 7.07 ft at 7:30PM Apr 08, 2021Observed: 7.06 ft at 7:45PM Apr 08, 2021Observed: 7.06 ft at 8:00PM Apr 08, 2021Observed: 7.06 ft at 8:15PM Apr 08, 2021Observed: 7.06 ft at 8:30PM Apr 08, 2021Observed: 7.06 ft at 8:45PM Apr 08, 2021Observed: 7.06 ft at 9:00PM Apr 08, 2021Observed: 7.07 ft at 9:15PM Apr 08, 2021Observed: 7.06 ft at 9:30PM Apr 08, 2021Observed: 7.07 ft at 9:45PM Apr 08, 2021Observed: 7.07 ft at 10:00PM Apr 08, 2021Observed: 7.07 ft at 10:15PM Apr 08, 2021Observed: 7.07 ft at 10:16PM Apr 08, 2021Observed: 7.07 ft at 10:30PM Apr 08, 2021Observed: 7.07 ft at 10:31PM Apr 08, 2021Observed: 7.08 ft at 10:45PM Apr 08, 2021Observed: 7.08 ft at 10:46PM Apr 08, 2021Observed: 7.08 ft at 11:00PM Apr 08, 2021Observed: 7.09 ft at 11:15PM Apr 08, 2021Observed: 7.08 ft at 11:30PM Apr 08, 2021Observed: 7.08 ft at 11:45PM Apr 08, 2021Observed: 7.08 ft at 12:00AM Apr 09, 2021Observed: 7.08 ft at 12:15AM Apr 09, 2021Observed: 7.08 ft at 12:30AM Apr 09, 2021Observed: 7.09 ft at 12:45AM Apr 09, 2021Observed: 7.08 ft at 1:00AM Apr 09, 2021Observed: 7.08 ft at 1:15AM Apr 09, 2021Observed: 7.08 ft at 1:30AM Apr 09, 2021Observed: 7.08 ft at 1:45AM Apr 09, 2021Observed: 7.08 ft at 2:00AM Apr 09, 2021Observed: 7.09 ft at 2:15AM Apr 09, 2021Observed: 7.08 ft at 2:30AM Apr 09, 2021Observed: 7.08 ft at 2:45AM Apr 09, 2021Observed: 7.08 ft at 3:00AM Apr 09, 2021Observed: 7.09 ft at 3:15AM Apr 09, 2021Observed: 7.08 ft at 3:30AM Apr 09, 2021Observed: 7.08 ft at 3:45AM Apr 09, 2021Observed: 7.1 ft at 4:00AM Apr 09, 2021Observed: 7.09 ft at 4:15AM Apr 09, 2021Observed: 7.09 ft at 4:30AM Apr 09, 2021Observed: 7.09 ft at 4:45AM Apr 09, 2021Observed: 7.1 ft at 5:00AM Apr 09, 2021Observed: 7.09 ft at 5:15AM Apr 09, 2021Observed: 7.1 ft at 5:30AM Apr 09, 2021Observed: 7.1 ft at 5:45AM Apr 09, 2021Observed: 7.09 ft at 6:00AM Apr 09, 2021Observed: 7.09 ft at 6:15AM Apr 09, 2021Observed: 7.09 ft at 6:16AM Apr 09, 2021Observed: 7.09 ft at 6:30AM Apr 09, 2021Observed: 7.09 ft at 6:31AM Apr 09, 2021Observed: 7.09 ft at 6:45AM Apr 09, 2021Observed: 7.09 ft at 6:46AM Apr 09, 2021Observed: 7.11 ft at 7:00AM Apr 09, 2021Observed: 7.11 ft at 7:15AM Apr 09, 2021Observed: 7.11 ft at 7:30AM Apr 09, 2021Observed: 7.13 ft at 7:45AM Apr 09, 2021Observed: 7.14 ft at 8:00AM Apr 09, 2021Observed: 7.14 ft at 8:15AM Apr 09, 2021Highest Observation: 7.15 ft at 8:30AM Apr 09, 2021Observed: 7.14 ft at 8:45AM Apr 09, 2021Highest Observation: 7.15 ft at 9:00AM Apr 09, 2021Highest Observation: 7.15 ft at 9:15AM Apr 09, 2021Highest Observation: 7.15 ft at 9:30AM Apr 09, 2021Highest Observation: 7.15 ft at 9:45AM Apr 09, 2021Highest Observation: 7.15 ft at 10:00AM Apr 09, 2021Highest Observation: 7.15 ft at 10:15AM Apr 09, 2021Highest Observation: 7.15 ft at 10:30AM Apr 09, 2021Highest Observation: 7.15 ft at 10:45AM Apr 09, 2021Highest Observation: 7.15 ft at 11:00AM Apr 09, 2021Observed: 7.14 ft at 11:15AM Apr 09, 2021Highest Observation: 7.15 ft at 11:30AM Apr 09, 2021Highest Observation: 7.15 ft at 11:45AM Apr 09, 2021Highest Observation: 7.15 ft at 12:00PM Apr 09, 2021Observed: 7.14 ft at 12:15PM Apr 09, 2021Highest Observation: 7.15 ft at 12:30PM Apr 09, 2021Highest Observation: 7.15 ft at 12:45PM Apr 09, 2021Highest Observation: 7.15 ft at 1:00PM Apr 09, 2021Highest Observation: 7.15 ft at 1:15PM Apr 09, 2021Observed: 7.14 ft at 1:30PM Apr 09, 2021Highest Observation: 7.15 ft at 1:45PM Apr 09, 2021Highest Observation: 7.15 ft at 2:00PM Apr 09, 2021Observed: 7.14 ft at 2:15PM Apr 09, 2021Observed: 7.14 ft at 2:30PM Apr 09, 2021Observed: 7.14 ft at 2:45PM Apr 09, 2021Observed: 7.13 ft at 3:00PM Apr 09, 2021Observed: 7.13 ft at 3:15PM Apr 09, 2021Observed: 7.14 ft at 3:30PM Apr 09, 2021Observed: 7.13 ft at 3:45PM Apr 09, 2021Observed: 7.13 ft at 4:00PM Apr 09, 2021Observed: 7.13 ft at 4:15PM Apr 09, 2021Observed: 7.13 ft at 4:30PM Apr 09, 2021Observed: 7.11 ft at 4:45PM Apr 09, 2021Observed: 7.11 ft at 5:00PM Apr 09, 2021Observed: 7.12 ft at 5:15PM Apr 09, 2021Observed: 7.11 ft at 5:30PM Apr 09, 2021Observed: 7.1 ft at 5:45PM Apr 09, 2021Observed: 7.11 ft at 6:00PM Apr 09, 2021Observed: 7.1 ft at 6:15PM Apr 09, 2021Observed: 7.1 ft at 6:30PM Apr 09, 2021Observed: 7.1 ft at 6:45PM Apr 09, 2021Observed: 7.1 ft at 7:00PM Apr 09, 2021Observed: 7.09 ft at 7:15PM Apr 09, 2021Observed: 7.08 ft at 7:30PM Apr 09, 2021Observed: 7.07 ft at 7:45PM Apr 09, 2021Observed: 7.09 ft at 8:00PM Apr 09, 2021Observed: 7.07 ft at 8:15PM Apr 09, 2021Observed: 7.08 ft at 8:30PM Apr 09, 2021Observed: 7.08 ft at 8:45PM Apr 09, 2021Observed: 7.06 ft at 9:00PM Apr 09, 2021Observed: 7.06 ft at 9:15PM Apr 09, 2021Observed: 7.07 ft at 9:30PM Apr 09, 2021Observed: 7.07 ft at 9:45PM Apr 09, 2021Observed: 7.07 ft at 10:00PM Apr 09, 2021Observed: 7.06 ft at 10:15PM Apr 09, 2021Observed: 7.06 ft at 10:16PM Apr 09, 2021Observed: 7.07 ft at 10:30PM Apr 09, 2021Observed: 7.07 ft at 10:31PM Apr 09, 2021Observed: 7.07 ft at 10:45PM Apr 09, 2021Observed: 7.07 ft at 10:46PM Apr 09, 2021Observed: 7.06 ft at 11:00PM Apr 09, 2021Observed: 7.07 ft at 11:15PM Apr 09, 2021Observed: 7.08 ft at 11:30PM Apr 09, 2021Observed: 7.07 ft at 11:45PM Apr 09, 2021Observed: 7.07 ft at 12:00AM Apr 10, 2021Observed: 7.08 ft at 12:15AM Apr 10, 2021Observed: 7.07 ft at 12:30AM Apr 10, 2021Observed: 7.07 ft at 12:45AM Apr 10, 2021Observed: 7.08 ft at 1:00AM Apr 10, 2021Observed: 7.06 ft at 1:15AM Apr 10, 2021Observed: 7.06 ft at 1:30AM Apr 10, 2021Observed: 7.07 ft at 1:45AM Apr 10, 2021Observed: 7.07 ft at 2:00AM Apr 10, 2021Observed: 7.07 ft at 2:15AM Apr 10, 2021Observed: 7.06 ft at 2:30AM Apr 10, 2021Observed: 7.05 ft at 2:45AM Apr 10, 2021Observed: 7.05 ft at 3:00AM Apr 10, 2021Observed: 7.06 ft at 3:15AM Apr 10, 2021Observed: 7.06 ft at 3:30AM Apr 10, 2021Observed: 7.05 ft at 3:45AM Apr 10, 2021Observed: 7.07 ft at 4:00AM Apr 10, 2021Observed: 7.06 ft at 4:15AM Apr 10, 2021Observed: 7.05 ft at 4:30AM Apr 10, 2021Observed: 7.07 ft at 4:45AM Apr 10, 2021Observed: 7.06 ft at 5:00AM Apr 10, 2021Observed: 7.05 ft at 5:15AM Apr 10, 2021Observed: 7.05 ft at 5:30AM Apr 10, 2021Observed: 7.06 ft at 5:45AM Apr 10, 2021Observed: 7.06 ft at 6:00AM Apr 10, 2021Observed: 7.07 ft at 6:15AM Apr 10, 2021Observed: 7.06 ft at 6:30AM Apr 10, 2021Observed: 7.05 ft at 6:45AM Apr 10, 2021Observed: 7.06 ft at 7:00AM Apr 10, 2021Observed: 7.06 ft at 7:15AM Apr 10, 2021Observed: 7.06 ft at 7:30AM Apr 10, 2021Observed: 7.05 ft at 7:45AM Apr 10, 2021Observed: 7.07 ft at 8:00AM Apr 10, 2021Observed: 7.05 ft at 8:15AM Apr 10, 2021Observed: 7.06 ft at 8:30AM Apr 10, 2021Observed: 7.06 ft at 8:45AM Apr 10, 2021Observed: 7.05 ft at 9:00AM Apr 10, 2021Observed: 7.06 ft at 9:15AM Apr 10, 2021Observed: 7.06 ft at 9:30AM Apr 10, 2021Observed: 7.06 ft at 9:45AM Apr 10, 2021Observed: 7.07 ft at 10:00AM Apr 10, 2021Observed: 7.06 ft at 10:15AM Apr 10, 2021Observed: 7.06 ft at 10:30AM Apr 10, 2021Observed: 7.06 ft at 10:45AM Apr 10, 2021Observed: 7.07 ft at 11:00AM Apr 10, 2021Observed: 7.05 ft at 11:15AM Apr 10, 2021Observed: 7.07 ft at 11:30AM Apr 10, 2021Observed: 7.04 ft at 11:45AM Apr 10, 2021Observed: 7.07 ft at 12:00PM Apr 10, 2021Observed: 7.05 ft at 12:15PM Apr 10, 2021Observed: 7.06 ft at 12:30PM Apr 10, 2021Observed: 7.06 ft at 12:45PM Apr 10, 2021Observed: 7.07 ft at 1:00PM Apr 10, 2021Observed: 7.05 ft at 1:15PM Apr 10, 2021Observed: 7.05 ft at 1:30PM Apr 10, 2021Observed: 7.06 ft at 1:45PM Apr 10, 2021Observed: 7.07 ft at 2:00PM Apr 10, 2021Observed: 7.06 ft at 2:15PM Apr 10, 2021Observed: 7.06 ft at 2:30PM Apr 10, 2021Observed: 7.06 ft at 2:31PM Apr 10, 2021Observed: 7.06 ft at 2:45PM Apr 10, 2021Observed: 7.06 ft at 2:46PM Apr 10, 2021Observed: 7.05 ft at 3:00PM Apr 10, 2021Observed: 7.05 ft at 3:01PM Apr 10, 2021Observed: 7.05 ft at 3:15PM Apr 10, 2021Observed: 7.06 ft at 3:30PM Apr 10, 2021Observed: 7.05 ft at 3:45PM Apr 10, 2021Observed: 7.05 ft at 4:00PM Apr 10, 2021Observed: 7.06 ft at 4:15PM Apr 10, 2021Observed: 7.06 ft at 4:30PM Apr 10, 2021Observed: 7.05 ft at 4:45PM Apr 10, 2021Observed: 7.05 ft at 5:00PM Apr 10, 2021USGS--Water Resources of the United StatesGCOS2(plotting HGIRG) Graph Created (6:09PM Apr 10, 2021)ObservedLatest observed value: 7.05 ft at 5:00 PM MDT 10-Apr-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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