Overview
ARKANSAS RIVER AT PORTLAND, CO. (ARKPORCO)
Stream
Abbreviation ARKPORCO
WDID 1209502
Well Permit
USGS Station ID 07097000
Cooperator ID 07097000
Drainage Area 4024
Contributing Area
Gage Datum
Division 2
Water District 12
County FREMONT
State CO
Water Source ARKANSAS RIVER [00078956] @ Stream Mile: 236.54
Hydrologic Unit Code 11020002
UTM X 498628.4
UTM Y 4248884.6
Latitude 38.388178
Longitude -105.015720
Location Accuracy User supplied

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Observations - Original Measured Values
Full Record: 04/15/1985 to 06/05/2026
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Stage/Discharge Measurements
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Analysis - Best Available Data
Record Type:
Full Record: 1939 to 2026
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 Water Year
 Irrigation Year
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Full Record: 06/01/1939 to 06/04/2026
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Full Record: 1991 to 2025
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Parameter
DISCHARGE

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Last Published
Water Year 2025
Peak Discharge
15900 CFS on 7/6/2006 12:00:00 AM
Published Date
3/16/2026 3:59:04 PM
Peak Stage
12.94 FT on 7/6/2006 12:00:00 AM












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Full Record: 11/06/1998 to 06/04/2026
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GAGE.00.01.02.03.04.05.06.07.08.09DIFF

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The graph shows both the base rating and the current shift adjusted rating.
Date/TimeComment
06/02/2006 15:03Added "PRECIP" Sensor
04/22/2008 15:26Added a self-timed "Stream Gage Float" (GH2) sensor
04/22/2008 15:26Updated the self-timed "Specific Conductivity" (COND1) sensor
04/22/2008 15:26Updated the self-timed "Temperature Sensor" (TEMP1) sensor
04/22/2008 15:26Updated the self-timed "Stream Gage Float" (GH1) sensor
04/22/2008 15:26Updated the self-timed "Precipitation Gage" (PC1) sensor
04/22/2008 15:27Added "GAGE_HT2" to Telemetry Results
04/22/2008 15:27Updated ILEX decoding system
04/24/2008 08:21Set web message to "Eqp"
04/24/2008 08:21Changed shift curve used by DISCHRG to "None"
04/24/2008 08:23Changed shift curve used by DISCHRG to "None"
04/24/2008 16:34Turned off web message
04/24/2008 16:34Changed shift curve used by DISCHRG to "None"
04/25/2008 07:19Set web message to "Eqp"
04/25/2008 07:19Changed shift curve used by DISCHRG to "None"
04/25/2008 12:12Turned off web message
04/25/2008 12:12Changed shift curve used by DISCHRG to "None"
12/22/2008 12:23Removed the self-timed "Stream Gage Float" (GH2) sensor
12/22/2008 12:23Updated the self-timed "Precipitation Gage" (PC1) sensor
12/22/2008 12:24Updated the self-timed "Stream Gage Float" (GH1) sensor
12/22/2008 12:24Updated the self-timed "Temperature Sensor" (TEMP1) sensor
12/22/2008 12:25Updated the self-timed "Specific Conductivity" (COND1) sensor
12/22/2008 12:25Updated ILEX decoding system
12/22/2008 15:50Updated the self-timed "Precipitation Gage" (PC1) sensor
12/22/2008 15:51Updated the self-timed "Stream Gage Float" (GH1) sensor
12/22/2008 15:51Updated the self-timed "Temperature Sensor" (TEMP1) sensor
12/22/2008 15:52Updated the self-timed "Specific Conductivity" (COND1) sensor
12/22/2008 15:52Added a self-timed "Stream Gage Float" (GH2) sensor
12/22/2008 15:53Updated ILEX decoding system
03/16/2009 14:16Updated "DISCHRG" in Telemetry Results
07/13/2010 15:53Set web message to "Eqp"
07/14/2010 10:59Updated the self-timed "Stream Gage Float" (GH2) sensor
07/14/2010 10:59Updated the self-timed "Stream Gage Float" (GH1) sensor
07/14/2010 11:00Updated the self-timed "Precipitation Gage" (PC1) sensor
07/14/2010 11:00Updated the self-timed "Temperature Sensor" (TEMP1) sensor
07/14/2010 11:01Updated the self-timed "Specific Conductivity" (COND1) sensor
07/14/2010 11:01Updated ILEX decoding system
07/14/2010 14:49Turned off web message
02/03/2011 14:27Set web message to "Ice"
02/17/2011 11:51Turned off web message
10/10/2012 15:35Set web message to "na"
10/12/2012 15:00Changed rating table used by DISCHRG to ARKPORCO10T
10/16/2012 12:04Turned off web message
12/07/2012 13:36Removed "GAGE_HT" from Telemetry Results
12/07/2012 13:38Removed the self-timed "Stream Gage Float" (GH1) sensor
12/07/2012 13:39Updated the self-timed "Precipitation Gage" (PC1) sensor
12/07/2012 13:39Updated the self-timed "Temperature Sensor" (TEMP1) sensor
12/07/2012 13:40Updated the self-timed "Specific Conductivity" (COND1) sensor
12/07/2012 13:42Updated ILEX decoding system
12/26/2012 08:13Set web message to "Ice"
01/28/2013 16:00Turned off web message
12/09/2013 08:35Set web message to "Ice"
12/23/2013 08:23Turned off web message
02/06/2014 08:48Set web message to "Ice"
02/10/2014 10:21Turned off web message
02/10/2014 10:21Set web message to "Ice"
02/13/2014 09:19Turned off web message
06/05/2014 16:22Set web message to "na"
07/10/2014 17:04Changed rating table used by DISCHRG to ARKPORCO10
07/31/2014 16:51Turned off web message
11/13/2014 08:34Set web message to "Eqp"
11/13/2014 09:45Turned off web message
12/31/2014 08:14Set web message to "Eqp"
12/31/2014 11:08Turned off web message
01/05/2015 09:32Set web message to "Ice"
01/13/2015 10:15Turned off web message
12/13/2015 06:10Changed NESDIS id from "51592160" to "51592160" in system
12/30/2015 11:48Updated the random "Stream Gage Float" (GH1) sensor
01/04/2016 09:14Set web message to "Ice"
01/06/2016 07:52Turned off web message
03/25/2016 12:22Set web message to "Eqp"
03/25/2016 16:02Turned off web message
03/31/2016 14:25Changed NESDIS id from "51592160" to "5147170C" in system
06/07/2016 16:54Changed rating table used by DISCHRG to ARKPORCO11A
12/09/2016 16:01Removed "WATTEMP" from Telemetry Results
12/09/2016 16:02Removed "PRECIP" from Telemetry Results
01/11/2017 10:07Added "PRECIP" to Telemetry Results
01/11/2017 10:07Removed "COND" from Telemetry Results
01/11/2017 10:09Updated the self-timed "Temperature Sensor" (TEMP1) sensor
01/11/2017 10:09Updated the self-timed "Specific Conductivity" (COND1) sensor
10/19/2017 13:46Changed rating table used by DISCHRG to ARKPORCO12A
03/06/2018 13:23Updated the self-timed "Precipitation Gage" (PC1) sensor
03/06/2018 13:25Updated the self-timed "Temperature Sensor" (TEMP1) sensor
03/06/2018 13:26Removed the random "Stream Gage Float" (GH1) sensor
03/06/2018 13:26Added a random "Stream Gage Float" (GH2) sensor
03/06/2018 13:27Added "AIRTEMP" to Telemetry Results
01/02/2019 09:12Set web message to "Ice"
01/08/2019 08:31Turned off web message
11/21/2024 15:30Updated "DISCHRG" (GH2) in Telemetry Results
01/13/2025 10:58Updated the self-timed "Air Temp" (TEMP1) sensor
01/13/2025 10:58Turned on syncing time series data from sensor 157 to Aquarius
01/13/2025 10:59Updated the self-timed "Precipitation Gage" (PC1) sensor
01/13/2025 10:59Turned on syncing time series data from sensor 1289 to Aquarius
10/08/2025 12:01Updated "ARKPORCO" (5147170C) Telemetry Station