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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 06818650 East Platte River near Knowlton, IA
Ringgold County, Iowa
Hydrologic Unit Code 10240012
Latitude  40°53'57", Longitude  94°25'50" NAD27
Drainage area 66.8  square miles
Gage datum 1,140 feet above NGVD29
Output formats
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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)
181977-07-19 -- ----YesRDBUSGS0.00 UnspecifiedClearNONE
171976-09-21 -- ----YesRDBUSGS0.00 Unspecified NONE
161975-09-23 15:15CDTYesRDBUSGS0.0426.78 GoodClearNONE1Imported Channel 1CRANunspeunkno0.04 0.00UNSPUNSPUNSPunknUNSPUNSPUNSP
151974-09-23 14:35CDTYesRDBUSGS0.0123.24 PoorClearNONE1Imported Channel 1WADEunspeunkno0.010.600.040.16UNSPUNSPUNSPunknUNSPUNSPUNSP
141971-08-24 12:35CDTYesOJRUSGS0.02-25.17 FairClearNONE1Imported Channel 1WADEunspeunkno0.020.900.050.00UNSPUNSPUNSPunknUNSPUNSPUNSP
131970-07-08 08:20CDTYesOJRUSGS0.60-26.37 GoodClearNONE1Imported Channel 1WADEunspeunkno0.605.000.800.75UNSPUNSPUNSPunknUNSPUNSPUNSP
121969-09-22 12:25CSTYesARCUSGS5.0026.22 GoodClearNONE1Imported Channel 1WADEunspeunkno5.002.500.540.31UNSPUNSPUNSPunknUNSPUNSPUNSP
111968-03-12 13:45CSTYesDASUSGS1.6924.28 GoodClearNONE1Imported Channel 1WADEunspeunkno1.694.501.271.33UNSPUNSPUNSPunknUNSPUNSPUNSP
101967-12-13 08:25CSTYesDASUSGS0.0022.32 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno0.005.00 0.00UNSPUNSPUNSPunknUNSPUNSPUNSP
91966-08-10 09:10CSTYesRDBUSGS0.6624.09 FairClearNONE1Imported Channel 1WADEunspeunkno0.663.000.631.05UNSPUNSPUNSPunknUNSPUNSPUNSP
81964-10-26 11:25CSTYesFELUSGS4.8723.63 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno4.876.504.461.09UNSPUNSPUNSPunknUNSPUNSPUNSP
71963-10-31 14:10CSTYesEDSUSGS0.0224.05 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno0.020.900.060.33UNSPUNSPUNSPunknUNSPUNSPUNSP
61961-10-25 16:25CSTYesCWSUSGS12.425.420.000.30GoodClearNONE1Imported Channel 1WADEunspeunkno12.417.010.31.20UNSPUNSPUNSPunknUNSPUNSPUNSP
51960-09-13 13:20CSTYesDJGUSGS1.8525.51 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno1.856.001.801.03UNSPUNSPUNSPunknUNSPUNSPUNSP
41960-09-12 15:45CSTYesRDBUSGS1.9925.49 FairClearNONE1Imported Channel 1WADEunspeunkno1.993.501.951.04UNSPUNSPUNSPunknUNSPUNSPUNSP
31959-07-28 15:45CSTYesFELUSGS0.5525.71 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno0.552.000.391.41UNSPUNSPUNSPunknUNSPUNSPUNSP
21958-10-14 10:15CSTYesFELUSGS2.5825.50 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno2.584.001.651.54UNSPUNSPUNSPunknUNSPUNSPUNSP