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 USGS Station 05474500
MISSISSIPPI RIVER AT KEOKUK, IA

MISSISSIPPI RIVER MAIN STEM

Latitude: 40^23'37"; Longitude: 91^22'27"
Hydrologic Unit Code: 07080104
Drainage area: 119,000 square miles, approximately.
Additional information is available about this station.
Use these links to retrieve Streamflow Hydrograph, or tab-separated ASCII file of monthly data.

Summary of Monthly Flows (1961-90)for Station 05474500

                                           MEDIAN   
                     25             75     CUMU-    
                   QUAR            QUAR-   LATIVE   
PERIOD      AVG.    ILE   MEDIAN   TILE    RUNOFF   
           (cfs)   (cfs)   (cfs)   (cfs)   (inch)   
-------------------------------------------------
OCT.	   58133   30980   51103   73694    0.50
NOV.	   60487   36532   55182   78065    1.01
DEC.	   48193   29656   47660   62447    1.55
OCT-DEC	   55604   34883   53817   71452
CALYEAR	   72016   52292   67807   89205

JAN.	   43240   29756   39242   56485    1.91
FEB.	   50213   34309   45103   67433    2.28
MAR.	   93502   63680   90931  113411    3.15
JAN-MAR	   62318   46337   57799   78160
OCT-MAR	   58961   40915   55078   78508

APR.	  132814   84658  134772  178175    4.43
MAY	  114805   74213  102969  159643    5.83
JUNE	   87900   54825   87772  108632    6.66
APR-JUN	  111839   78790  110154  147593

JULY	   70498   36630   65313  102804    7.50
AUG.	   49758   33312   48984   60646    8.02
SEP.	   53515   33812   51197   71045    8.44
JUL-SEP	   57923   39201   57002   74657
APR-SEP	   84881   60324   79033  109632

WATYEAR	   71962   54440   74013   88387

Extreme High and Low Monthly and Daily Average Flows for Station 05474500

                    SECOND     THIRD                             SECOND     THIRD                
        MON.  HI.  MON.  HI.  MON.  HI.  DAILY  HI.  MON.  LO.  MON.  LO.  MON.  LO.  DAILY  LO. 
       ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------  
        FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR.  FLOW  YR.  FLOW  YR.  FLOW  YR.  FLOW   YR. 
PERIOD  (cfs)      (cfs)      (cfs)      (cfs)       (cfs)      (cfs)      (cfs)      (cfs)      
------ ----------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
OCT.	221065.-18 215500. 87 154000.-15 293000.-18 16065.  34 16487.  77 17668.  49 12200.  77 
NOV.	211300.-18 118823. 83 112953. 73 293000.-18 16017.  34 17573.  77 20550.  33 10700.  77 
DEC.	125626. 83 109597.-18 78252.  66 180000. 83 13448.  34 14194.  11 16203.  77 5000.   34 
JAN.	101561. 73 94465.  46 84710.  60 223300. 46 14652.  40 14677.  -4 15058.  24 8600.   24 
FEB.	95660.  84 92732.  73 90689.  66 205000. 85 15786.  -1 16036.  -7 16960.   2 10000.  -1 
MAR.	185365. 73 170387. 83 155274. 29 267000. 73 21784.  34 23887.  31 29813.  -4 15500.  34 
APR.	229667. 73 222067. 79 213817. 65 344000. 73 32927.  -5 33283.