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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 04116500 FLAT RIVER AT SMYRNA, MI
Ionia County, Michigan
Hydrologic Unit Code 04050006
Latitude  43°03'10", Longitude  85°15'53" NAD27
Drainage area 528  square miles
Gage datum 729.14 feet above NAVD88
Output formats
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HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
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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)
4012023-04-07 08:41:31ESTYesTRM/RLHUSGS20806.150.000.40FairClearNONE1MAINBRUSQADCPVADCP208063.92807.42FIRMCBLSEVENSTDYEVENSTNDUPST2000.00
4002020-05-20 08:34:10ESTYesRWHUSGS28006.930.000.32FairClearOTHR1FLAT RIVERBRDSQADCPVADCP284095.25175.50FIRMGRVLEVENSTDYEVENSTNDUPST3700.00
3992019-10-03 10:34:38ESTYesRWHUSGS19606.230.010.27GoodClearNONE1FLAT RIVERBRDSQADCPVADCP196096.24514.34FIRMGRVLEVENSTDYEVENUNFMUPST3700.00
3982017-05-05 07:21:57ESTYesRWHUSGS15505.64-0.010.30GoodClearNONE1FLAT RIVERBRDSQADCPVADCP155097.33634.27FIRMCBLSEVENunknEVENSTNDUPST3500.00
3972013-04-23 12:30:55ESTYesJTLUSGS23506.610.000.20FairUnspecifedNONE1mainBRDSQADCPVADCP235087.54724.98FIRMCBLSEVENunknUNEVSTNDUPST3700.00
3962011-05-02 12:08ESTYesDJO/RWHUSGS18305.800.000.30FairClearNONE1Imported Channel 1MBOTQADCPVADCP183098.83904.70FIRMGRVLEVENunknEVENUNFMUNSP
3952009-04-28 14:01:49ESTYesTRM/CKTUSGS22606.41-0.011.20GoodClearNONE1Imported Channel 1BRUSQSCMMVPAA226094.04554.96UNSPUNSPUNSPunknUNEVUNSPUPST3700.00
3942002-03-14 15:10ESTYesRWHUSGS12705.330.021.20GoodClearNONE1Imported Channel 1CRANunspeunkno127090.03413.79UNSPUNSPUNSPunknUNSPUNSPUNSP
3932000-05-19 -- ----YesRLL/TGSUSGS18806.080.000.90GoodClearNONE1Imported Channel 1CRANunspeunkno188087.04114.57UNSPUNSPUNSPunknUNSPUNSPUNSP
3922000-05-18 -- ----YesTRM/TGSUSGS15105.57-0.231.00GoodClearNONE1Imported Channel 1CRANunspeunkno151090.03714.07UNSPUNSPUNSPunknUNSPUNSPUNSP
3911993-04-20 -- ----YesRLLUSGS11705.22-0.030.90FairClearNONE1Imported Channel 1CRANunspeunkno117087.53293.56UNSPUNSPUNSPunknUNSPUNSPUNSP
390B1988-10-13 -- ----YesDEQUSGS340 Unspecified NONE1Imported Channel 1UNSPother 340 UNSPUNSPUNSPunknUNSPUNSPUNSP
390A1988-07-06 -- ----YesDEQUSGS174 Unspecified NONE1Imported Channel 1UNSPother 174 UNSPUNSPUNSPunknUNSPUNSPUNSP
3901986-11-06 -- ----YesCRWUSGS6904.52-0.010.90GoodClearNONE1Imported Channel 1WADEunspeunkno6901293741.84UNSPUNSPUNSPunknUNSPUNSPUNSP
3891986-09-13 -- ----YesRLL/CEOUSGS45909.000.012.30FairDebrisLightNONE1Imported Channel 1CRANunspeunkno459091.07146.43UNSPUNSPUNSPunknUNSPUNSPUNSP
3881986-08-15 -- ----YesTGHUSGS1623.53-0.010.50GoodDebrisHeavyNONE1Imported Channel 1WADEunspeunkno16271.01431.14UNSPUNSPUNSPunknUNSPUNSPUNSP
3871986-07-03 -- ----YesJAB/CRWUSGS3343.870.000.80GoodDebrisModerateNONE1Imported Channel 1WADEunspeunkno3341282671.25UNSPUNSPUNSPunknUNSPUNSPUNSP
3861986-05-21 -- ----YesTJH/CRWUSGS8864.800.000.80GoodClearNONE1Imported Channel 1CRANunspeunkno88687.03012.94UNSPUNSPUNSPunknUNSPUNSPUNSP
3851986-04-10 -- ----YesGLUSGS7204.570.000.80GoodClearNONE1Imported Channel 1WADEunspeunkno7201273721.94UNSPUNSPUNSPunknUNSPUNSPUNSP
3841986-02-25 -- ----YesCRW/JBMUSGS3973.880.060.80GoodClearNONE1Imported Channel 1WADEunspeunkno3971242831.40UNSPUNSPUNSPunknUNSPUNSPUNSP
3831986-01-15 -- ----YesDVE/CRWUSGS3885.420.020.80PoorIceShoreNONE1Imported Channel 1CRANunspeunkno38885.03321.17UNSPUNSPUNSPunknUNSPUNSPUNSP
3821985-12-05 -- ----YesCRWUSGS8174.760.000.80GoodClearNONE1Imported Channel 1WADEunspeunkno8171284012.04UNSPUNSPUNSPunknUNSPUNSPUNSP
3811985-10-25 -- ----YesCRWUSGS5194.280.001.00GoodDebrisModerateNONE1Imported Channel 1WADEunspeunkno5191253321.56UNSPUNSPUNSPunknUNSPUNSPUNSP
3801985-09-16 -- ----YesCRWUSGS4504.050.000.80GoodDebrisModerateNONE1Imported Channel 1WADEunspeunkno4501232941.53UNSPUNSPUNSPunknUNSPUNSPUNSP
3761985-03-28 12:35ESTYesCRWUSGS14105.470.021.20UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA141086.03683.83UNSPUNSPUNSPunknUNSPUNSPUNSP
3681984-05-08 12:40ESTYesRLL/JHUSGS4263.95-0.011.30UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA4261403291.29UNSPUNSPUNSPunknUNSPUNSPUNSP
3671984-04-03 12:22:30ESTYesCRWUSGS5574.26-0.010.80UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA5571253331.67UNSPUNSPUNSPunknUNSPUNSPUNSP
3661984-02-24 12:27:30ESTYesRLL/CRWUSGS9174.830.010.90UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA91786.02993.07UNSPUNSPUNSPunknUNSPUNSPUNSP
3421981-05-11 12:30ESTYesSJRUSGS11605.310.011.00UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA116085.03413.40UNSPUNSPUNSPunknUNSPUNSPUNSP
1751965-04-13 12:30ESTYesDBUSGS25606.820.031.00UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA256085.05174.93UNSPUNSPUNSPunknUNSPUNSPUNSP
1741965-04-09 12:30ESTYesDBUSGS17605.98-0.021.00UnspecifiedClearNONE1Imported Channel 1UNSPQSCMMVPAA176084.04204.19UNSPUNSPUNSPunknUNSPUNSPUNSP