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Streamflow Measurements for Arizona

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Welcome to the NWIS-Web for the Arizona Water Science Center


The majority of USGS Gaging Stations are funded though a cooperative program between the USGS other interested agencies.
Follow this link for information on the Cooperative Water Program with the USGS.

Arizona Water Science Center Home Page
Colorado Basin River Forecast Center (CBRFC) - provided by the National Weather Service, AHPS. CBRFC on an interactive map.
Threatened and Endangered USGS Gaging Stations in Arizona
! 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 09509501 HORSESHOE RESERVOIR AT HORSESHOE DAM, AZ
Maricopa County, Arizona
Hydrologic Unit Code 150602030503
Latitude  33°59'05", Longitude 111°42'35" NAD27
Drainage area 5,973.0  square miles
Gage datum 1,903.55 feet above NAVD88
Output formats
HTML table with channel data
HTML table without channel data
Tab-separated data with channel data
Tab-separated data without channel data
Graph of 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 
1R2009-11-24 10:20MSTYesMLS/FWSUSGS0.0072.18 UnspecifiedUnspecifedNONE
1Q2009-11-04 11:00MSTYesMLS?AKUSGS0.0069.76 UnspecifiedUnspecifedNONE
1P2009-10-07 09:15MSTYesMLSUSGS0.0058.25 UnspecifiedUnspecifedNONE
1O2009-09-08 13:00MSTYesMLSUSGS0.0051.95 UnspecifiedUnspecifedNONE
1N2009-08-14 07:46MSTYesS/DVUSGS0.0049.99 UnspecifiedUnspecifedNONE
1M2009-08-03 10:00MSTYesMLS/WVHUSGS0.0050.46 UnspecifiedNoFlowNONE
1L2009-06-24 12:04MSTYesMLSUSGS0.0051.20 UnspecifiedUnspecifedNONE
1k2009-06-03 11:00MSTYesMLSUSGS0.0060.08 UnspecifiedUnspecifedNONE
1j2009-05-05 08:00MSTYesMLSUSGS0.0097.71 UnspecifiedUnspecifedNONE
1i2009-03-24 09:00MSTYesMLSUSGS0.00100.47 UnspecifiedUnspecifedNONE
1h2009-03-02 12:15MSTYesMLSUSGS0.00108.02 UnspecifiedUnspecifedNONE
1g2009-02-05 09:30MSTYesMLSUSGS0.0087.69 UnspecifiedUnspecifedNONE
1f2009-02-03 10:00MSTYesMLSUSGS0.0087.94 UnspecifiedUnspecifedNONE
1e2009-01-09 08:15MSTYesMLSUSGS0.0081.01 UnspecifiedUnspecifedNONE
1D2008-12-09 09:15MSTYesMLSUSGS0.0051.390.00 Unspecified NONE
1c2008-11-06 13:45MSTYesMLSUSGS0.0055.440.00 UnspecifiedNoFlowNONE
1b2008-11-03 13:30MSTYesMLSUSGS0.0054.660.00 UnspecifiedNoFlowNONE