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USGS 05474500 Mississippi River at Keokuk, IA

  Stream Site

DESCRIPTION:
Latitude 40°23'37",   Longitude 91°22'27"   NAD27
Lee County, Iowa, Hydrologic Unit 07080104
Drainage area: 119,000 square miles
Datum of gage: 477.41 feet above   NGVD29.
AVAILABLE DATA:
Data Type Begin Date End Date Count
 Current / Historical Observations     (availability statement)    2021-05-06  2025-02-01  
 Daily Data
    Temperature, water, degrees Celsius  1974-11-04  2022-03-08  2290 
    Temperature, water, degrees Celsius  2021-05-07  2025-02-01  1351 
    Discharge, cubic feet per second  1878-01-01  2024-06-30  53506 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  1974-11-04  1981-09-15  2285 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2021-05-07  2025-02-01  1344 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2021-05-06  2025-02-01  1319 
    pH, water, unfiltered, field, standard units  2021-05-20  2025-02-01  1217 
    Chlorophyll fluorescence (fChl), water, in situ, concentration estimated from reference material, micrograms per liter as chlorophyll  2024-12-02  2025-01-31  58 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2021-05-07  2025-02-01  1244 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2023-04-13  2025-02-01  626 
 Daily Statistics 
    Temperature, water, degrees Celsius  2021-05-07  2024-12-09 1297 
    Discharge, cubic feet per second  1878-01-01  2024-05-19 53464 
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2021-05-07  2024-06-12 1110 
    Dissolved oxygen, water, unfiltered, milligrams per liter  2021-05-06  2024-04-08 1063 
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2021-05-07  2024-07-20 1103 
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2023-04-13  2024-10-15 517 
 Monthly Statistics 
    Temperature, water, degrees Celsius  2021-05  2024-12  
    Discharge, cubic feet per second  1878-01  2024-05  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2021-05  2024-06  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2021-05  2024-04  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2021-05  2024-07  
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2023-04  2024-10  
 Annual Statistics 
    Temperature, water, degrees Celsius  2021  2025  
    Discharge, cubic feet per second  1878  2024  
    Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius  2021  2024  
    Dissolved oxygen, water, unfiltered, milligrams per liter  2021  2024  
    Turbidity, water, unfiltered, monochrome near infra-red LED light, 780-900 nm, detection angle 90 +-2.5 degrees, formazin nephelometric units (FNU)  2021  2024  
    Nitrate plus nitrite, water, in situ, milligrams per liter as nitrogen  2023  2025  
 Peak streamflow 1851-06-06  2022-04-27  146 
 Field measurements 1934-06-28  2024-12-11  268 
 Field/Lab water-quality samples 1944-07-01  2021-05-20  248 
 Water-Year Summary 2006  2024  19 
 Revisions  Loading...
OPERATION:
Record for this site is maintained by the USGS Iowa Water Science Center
Email questions about this site to Iowa Water Science Center Water-Data Inquiries