MISSOURI RIVER MAIN STEM

                                   06330110  MISSOURI RIVER STAGE GAGE NO. 9 AT WILLISTON, ND

LOCATION.--Lat 4808'13", long 10336'16", in NE1/4NE1/4 sec.25, T.154 N., R.101 W., Williams County, Hydrologic Unit 10110101,
   on left bank levee at southeast edge of Williston 0.5 mi upstream from Little Muddy Creek, and at mile 1,546.2.

DRAINAGE AREA.--164,500 mi2, approximately.

                                                      GAGE-HEIGHT RECORDS

PERIOD OF RECORD.--April 1959 to current year.

GAGE.--Water-stage recorder. Datum of gage is 1,820.00 ft above sea level. Prior to May 13, 1969, at site 900 ft downstream. At
   datum 20.00 ft lower prior to Apr. 7, 1962.

REMARKS.--Stage regulated by upstream reservoirs and backwater from Lake Sakakawea.

EXTREMES FOR PERIOD OF RECORD.--Maximum daily gage height recorded, 34.61 ft, July 6, 1997; minimum daily recorded, 5.44 ft,
   Aug. 20, 1961, present datum.

                                 GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
                                                       DAILY MEAN VALUES

        DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

          1     24.78    24.57   e24.53    26.14    26.10    26.14    23.76   e24.38    26.77    25.86   e23.89    23.33
          2     24.79   e24.64   e24.56    26.13    26.11    26.06   e23.71    24.43    26.85    25.74   e23.85    23.41
          3     24.69   e24.66   e24.59    26.10    26.14    25.99   e23.70    24.50    26.88    25.67   e23.79    23.40
          4     24.70   e24.65    24.63    25.97    26.15    25.91   e23.68    24.62    26.85    25.61   e23.77    23.40
          5    e24.76    24.64    24.69    25.79    26.15    25.84   e23.66   e24.76    26.82    25.58    23.76   e23.41

          6    e24.98    24.67   e24.69    25.65    26.19   e25.78   e23.60    24.79    26.85    25.61    23.73   e23.41
          7    e24.82    24.67   e24.68    25.57    26.22    25.72   e23.63    24.84    26.85    25.63    23.69   e23.40
          8     24.76   e24.66   e24.60    25.62    26.20   e25.54    23.65    25.00    26.86    25.55    23.62    23.40
          9     24.73   e24.63   e24.62    25.75    26.20   e25.44    23.68    25.16    26.88    25.46    23.61    23.37
         10     24.76   e24.64   e24.70    25.88    26.23   e25.37   e23.71    25.28    26.91    25.46    23.61    23.38

         11     24.71    24.63    24.74    25.97    26.25    25.22   e23.71    25.31    26.93    25.39    23.58    23.37
         12     24.71    24.62    24.78    26.03    26.25    25.05   e23.75    25.27    26.93    25.42    23.57    23.39
         13     24.70    24.59   e24.80    25.97    26.24    24.93   e23.74    25.24    26.93    25.41   e23.56    23.33
         14     24.79    24.60    24.79    25.83    26.15    24.83   e23.74    25.22    26.85    25.28    23.52   e23.23
         15     24.68    24.59   e24.77    25.67    26.05   e24.76    23.80    25.26    26.74    25.10    23.46   e23.18

         16     24.61   e24.63    25.05    25.63    26.04    24.68    23.82    25.26    26.63    24.94   e23.46    23.14
         17     24.53   e24.60    25.41    25.66    26.04    24.50   e23.84    25.23    26.56   e24.87    23.42    23.11
         18     24.58   e24.59    25.60    25.70    26.05    24.27   e23.85    25.21    26.55   e24.83   e23.41   e23.09
         19     24.51   e24.59    25.79    25.73    26.05    24.17    23.87    25.17    26.49   e24.75   e23.40   e23.08
         20     24.59    24.59    25.86    25.76    26.08    24.08   e23.91    25.13    26.43   e24.68   e23.39   e23.08

         21     24.57    24.59    25.77    25.83    26.14   e24.03   e23.96    25.14    26.36   e24.60   e23.35   e23.07
         22     24.52    24.59    25.74    25.91    26.20   e24.04    23.99    25.36    26.25    24.51   e23.35   e23.06
         23     24.55   e24.58    25.75    25.95    26.26   e24.03    24.02    25.57    26.13    24.45   e23.34   e23.04
         24     24.56   e24.56    25.80    25.95    26.30    23.99   e24.04    25.69    26.09   e24.42   e23.33    23.03
         25    e24.51    24.55    25.92    25.97    26.32    23.94   e24.06    25.80    26.08   e24.36   e23.33   e23.01

         26    e24.60   e24.53    26.03    25.98    26.30   e23.89   e24.09    25.92    26.02   e24.28    23.31   e23.04
         27    e24.73    24.54    26.11    25.99    26.27   e23.87   e24.15    26.06    26.01   e24.23    23.31    23.05
         28    e24.73    24.54    26.15    26.00    26.25   e23.85    24.30    26.27    25.98   e24.16   e23.30    23.07
         29    e24.73   e24.56    26.16    26.02    26.20   e23.84    24.40    26.41    25.97    24.06   e23.28    23.10
         30     24.73    24.56    26.16    26.05      ---   e23.80    24.40    26.56    25.94    23.99   e23.27    23.12
         31     24.74      ---    26.15    26.09      ---   e23.78      ---    26.66      ---   e23.94    23.26      ---

        MEAN    24.68    24.60    25.28    25.88    26.18    24.75    23.87    25.34    26.55    24.96    23.50    23.22
        MAX     24.98    24.67    26.16    26.14    26.32    26.14    24.40    26.66    26.93    25.86    23.89    23.41
        MIN     24.51    24.53    24.53    25.57    26.04    23.78    23.60    24.38    25.94    23.94    23.26    23.01

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