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Scheduled Maintenance Notice
USGS will be performing maintenance on the time series data processing system beginning at 09:00 EDT on September 10, 2026. During this period, delivery of the latest time series data will be delayed. The maintenance is expected to finish within 2 hours, after which all backlogged time series data will be processed and delivered to WDFN web portals and APIs.

Discharge data collection will be discontinued on Oct. 1, 2026, due to loss of cooperator funding. Please contact the Central Midwest Water Science Center, Jon Lageman (jlageman@usgs.gov) if you have an interest in continuance and/or support of streamflow data at this site.

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Available data

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Continuous data

2 data types available - data from 2021-07-11 to 2026-09-09

Daily data

2 data types available - data from 2021-07-10 to 2026-09-08

Field measurements

2 data types available - data from 1994-07-06 to 2026-08-18

Discrete sample data

46 Observed properties (data types) available - with data from 1976-04-26 to 1996-07-26

30 Sampling activities

Peak measurements

2 data types available - with data from 2022-05-05 to 2025-08-01

Statistical tables for select daily data types

2 data types available - data from 2021-07-10 to 2026-09-08

Location details and information

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Operated in cooperation with:

US Army Corps of Engineers - Rock Island District

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	05465100	n/a
Location name	Iowa River at Columbus Junction, IA	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	41.278358886579	n/a
Decimal longitude (WGS84)	-91.3468215888307	n/a
Latitude-longitude method	Interpolated from MAP.	M
Latitude-longitude accuracy	Accurate to + or - 5 sec.	F
District	Iowa	19
State	Iowa	19
County	Louisa County	115
Country	United States of America	n/a
Altitude of gage/land surface	557.82 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.09 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Lower Iowa	07080209
Drainage basin		n/a
Date of first construction		n/a
Drainage area	12261 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	CST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a

Monitoring location Iowa River at Columbus Junction, IA - USGS-05465100