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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 06816350 Sevenmile Creek near Lyman, IA
Cass County, Iowa
Hydrologic Unit Code 10240009
Latitude  41°15'00", Longitude  94°59'00" NAD27
Drainage area 60.80  square miles
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)
201977-07-19 12:45CDTYesOJRUSGS0.69-35.91 GoodClearNONE1Imported Channel 1WADEunspeunkno0.695.101.170.59UNSPUNSPUNSPunknUNSPUNSPUNSP
191976-09-22 11:25CDTYesOJRUSGS2.48-35.66 GoodClearNONE1Imported Channel 1WADEunspeunkno2.4810.53.330.74UNSPUNSPUNSPunknUNSPUNSPUNSP
181975-09-23 09:40CDTYesMESUSGS3.0235.66 GoodClearNONE1Imported Channel 1WADEunspeunkno3.0216.54.040.75UNSPUNSPUNSPunknUNSPUNSPUNSP
171974-09-24 13:45CDTYesJGGUSGS4.0536.45 GoodClearNONE1Imported Channel 1WADEunspeunkno4.0512.04.210.96UNSPUNSPUNSPunknUNSPUNSPUNSP
161971-09-14 07:30CDTYesRDBUSGS0.8135.65 FairClearNONE1Imported Channel 1WADEunspeunkno0.815.000.830.00UNSPUNSPUNSPunknUNSPUNSPUNSP
151971-08-24 06:55CDTYesRDBUSGS1.6534.15 FairClearNONE1Imported Channel 1WADEunspeunkno1.6513.03.240.51UNSPUNSPUNSPunknUNSPUNSPUNSP
141970-07-07 10:40CDTYesEDSUSGS0.7729.66 GoodClearNONE1Imported Channel 1WADEunspeunkno0.775.001.090.71UNSPUNSPUNSPunknUNSPUNSPUNSP
131969-09-22 09:35CSTYesRDBUSGS2.6035.96 FairClearNONE1Imported Channel 1WADEunspeunkno2.606.502.860.91UNSPUNSPUNSPunknUNSPUNSPUNSP
121968-03-12 07:30CSTYesFELUSGS1.4135.76 PoorClearNONE1Imported Channel 1WADEunspeunkno1.4112.03.560.40UNSPUNSPUNSPunknUNSPUNSPUNSP
111967-12-12 14:20CSTYesOJRUSGS1.75-36.07 GoodClearNONE1Imported Channel 1WADEunspeunkno1.759.502.290.76UNSPUNSPUNSPunknUNSPUNSPUNSP
101966-08-09 07:45CSTYesEDSUSGS5.4935.99 GoodClearNONE1Imported Channel 1WADEunspeunkno5.4922.56.690.82UNSPUNSPUNSPunknUNSPUNSPUNSP
91964-10-26 09:50CSTYesRDBUSGS11.535.60 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno11.531.012.20.94UNSPUNSPUNSPunknUNSPUNSPUNSP
81963-10-31 07:00CSTYesRDBUSGS1.2135.97 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno1.215.001.121.08UNSPUNSPUNSPunknUNSPUNSPUNSP
71961-10-24 12:00CSTYesDERUSGS19.1-35.28 GoodClearNONE1Imported Channel 1WADEunspeunkno19.131.015.31.25UNSPUNSPUNSPunknUNSPUNSPUNSP
61960-09-13 11:35CSTYesEDSUSGS7.65-35.35 GoodClearNONE1Imported Channel 1WADEunspeunkno7.6518.58.060.95UNSPUNSPUNSPunknUNSPUNSPUNSP
51960-09-12 16:00CSTYesDERUSGS7.99-35.360.000.60GoodClearNONE1Imported Channel 1WADEunspeunkno7.9922.06.781.08UNSPUNSPUNSPunknUNSPUNSPUNSP
41959-07-27 06:00CSTYesFELUSGS6.8834.86 UnspecifiedClearNONE1Imported Channel 1WADEunspeunkno6.8816.08.910.77UNSPUNSPUNSPunknUNSPUNSPUNSP
31958-10-14 16:55CSTYesEDSUSGS8.39-34.64 GoodClearNONE1Imported Channel 1WADEunspeunkno8.3917.08.121.03UNSPUNSPUNSPunknUNSPUNSPUNSP
21958-05-13 08:40CSTYesAECUSGS6.18-34.600.000.30GoodClearNONE1Imported Channel 1WADEunspeunkno6.1814.06.320.98UNSPUNSPUNSPunknUNSPUNSPUNSP
11957-09-24 10:45CSTYesCWSUSGS1.5834.810.000.30FairClearNONE1Imported Channel 1WADEunspeunkno1.587.002.500.63UNSPUNSPUNSPunknUNSPUNSPUNSP