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Streamflow Measurements for the Nation

! Streamflow measurement pages will be decommissioned in early 2026. Please find the modernized pages in WDFN that suit you best. Learn more about our modernization plans and timeline and new pages.

USGS 05455012 Ralston Creek at College St at Iowa City, IA
Johnson County, Iowa
Hydrologic Unit Code 07080209
Latitude  41°39'31", Longitude  91°31'44" NAD27
Gage datum 650 feet above NGVD29
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Meas.
Number		   Date       Time Time
Datum		 Measurement
Used?		   Who Measuring
Agency		 Stream
flow
(ft3/s)		 Gage
Height
(ft)		 GH
Change
(ft)		 Meas.
Duration
(hr)		 Meas.
Rated		   Control Flow
Adjust.
Code 		 Channel
Number		 Channel
Name		 Meas.
type 		 Stream
flow
method 		 Velocity
method 		 Channel
flow
(ft3/s)		 Channel
width
(ft)		 Channel
area
(ft2)		 Channel
vel.
(ft/s)		 Channel
stability 		 Channel
material 		 Channel
evenness 		 Long.
vel.
desc. 		 Horz.
vel.
desc. 		 Vert.
vel.
desc. 		 Channel
loc.
code 		 Channel
loc.
dist.(ft)
71969-07-08 10:30CSTYes--H/DJGUSGS1740656.07 FairClearNONE1Imported Channel 1CRANunspeunkno17401164463.90UNSPUNSPUNSPunknUNSPUNSPUNSP
61966-02-09 09:00CSTYesDHAUSGS41.1646.67-0.020.70GoodClearNONE1Imported Channel 1WADEunspeunkno41.116.019.22.14UNSPUNSPUNSPunknUNSPUNSPUNSP
51966-02-08 13:45CSTYesDHAUSGS396650.66-0.570.70GoodClearNONE1Imported Channel 1CRANunspeunkno39621.093.44.24UNSPUNSPUNSPunknUNSPUNSPUNSP
41965-10-14 14:05CSTYesCWS/ERCUSGS90.2647.82-0.200.10PoorClearNONE1Imported Channel 1CRANunspeunkno90.222.045.61.98UNSPUNSPUNSPunknUNSPUNSPUNSP
31965-09-21 08:10CSTYesDHAUSGS98.2647.41 GoodClearNONE1Imported Channel 1CRANunspeunkno98.222.041.62.36UNSPUNSPUNSPunknUNSPUNSPUNSP
21965-09-20 08:30CSTYesJTF/CWSUSGS187648.210.000.10FairClearNONE1Imported Channel 1CRANunspeunkno18725.067.12.78UNSPUNSPUNSPunknUNSPUNSPUNSP
11965-01-22 14:45CSTYesJTFUSGS15610.14-0.270.30UnspecifiedClearNONE1Imported Channel 1CRANunspeunkno15623.052.03.00UNSPUNSPUNSPunknUNSPUNSPUNSP