RED RIVER OF THE NORTH BASIN

                                             05099600 PEMBINA RIVER AT WALHALLA, ND

LOCATION.--Lat 4854'48", long 9755'00", in SW1/4NE1/4NE1/4 sec.29, T.163 N., R.56 W., Pembina County, Hydrologic Unit
   09020313, on southeast corner of State Highway 32 bridge, 0.5 mi south of Walhalla and 7 mi downstream from Little South
   Pembina River.

DRAINAGE AREA.--3,350 mi2, approximately.


                                                    WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1939 to September 1990, April 2000 to September 2000. Prior to October 1963, published as "near
   Walhalla".

REVISED RECORDS.--WSP 1388: 1943, 1950(P). WSP 1558: 1957. WSP 1728: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 933.34 ft above sea level. Prior to Nov. 10, 1943, nonrecording gage and Nov. 10,
   1943, to Sept. 30, 1963, water stage recorder at site 5.5 mi upstream at difference datum.

REMARKS.--Records good except those for estimated daily discharges, which are poor. Discharges from Apr. 13 to June 12 based on
   once daily observer readings.

EXTREMES FOR CURRENT YEAR.--Maximum discharge, 136 ft3/s, June 16, gage-height 2.59 ft; minimum daily discharge, 25 ft3/s, Aug.
   26 and 27.

EXTREMES OUTSIDE PERIOD OF RECORD.--A peak gage height of 16.53 ft (from floodmark) discharge not determined, occurred on Apr.
   25 or 26, 1977. A measured discharge of 22,500 ft3/s, gage height, 16.20 ft, occurred on Apr. 26, 1997.

                          DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
                                                       DAILY MEAN VALUES

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

          1       ---      ---      ---      ---      ---      ---      ---       89       58      e47       35       38
          2       ---      ---      ---      ---      ---      ---      ---       88       56      e46       32       35
          3       ---      ---      ---      ---      ---      ---      ---       88       54      e45       32       38
          4       ---      ---      ---      ---      ---      ---      ---       86       52      e47       32       35
          5       ---      ---      ---      ---      ---      ---      ---       83       52      e49       33       37

          6       ---      ---      ---      ---      ---      ---      ---       86       51      e52       41       38
          7       ---      ---      ---      ---      ---      ---      ---       88       50      e52       39       35
          8       ---      ---      ---      ---      ---      ---      ---       86       52      e49       36       36
          9       ---      ---      ---      ---      ---      ---      ---       86       52      e46       41       35
         10       ---      ---      ---      ---      ---      ---      ---       86       66      e45       41       31

         11       ---      ---      ---      ---      ---      ---      ---       86       67      e56       39       31
         12       ---      ---      ---      ---      ---      ---      ---       91       73       52       54       32
         13       ---      ---      ---      ---      ---      ---      124       95       68       46       49       34
         14       ---      ---      ---      ---      ---      ---      118       93       96       41       40       33
         15       ---      ---      ---      ---      ---      ---      107       93       87       38       36       31

         16       ---      ---      ---      ---      ---      ---      111       91      119       42       31       31
         17       ---      ---      ---      ---      ---      ---      116       89       91       41       33       32
         18       ---      ---      ---      ---      ---      ---      111       89       75       38       36       31
         19       ---      ---      ---      ---      ---      ---      107       89       67       36       32       32
         20       ---      ---      ---      ---      ---      ---      104       89       60       37       34       34

         21       ---      ---      ---      ---      ---      ---      111       89       59       40       36       31
         22       ---      ---      ---      ---      ---      ---      107       88       60       41       32       32
         23       ---      ---      ---      ---      ---      ---      105       86       52       40       30       30
         24       ---      ---      ---      ---      ---      ---      102       83       47       40       27       29
         25       ---      ---      ---      ---      ---      ---      100       80       51       40       26       30

         26       ---      ---      ---      ---      ---      ---      100       75       56       40       25       33
         27       ---      ---      ---      ---      ---      ---       95       69       52       37       25       32
         28       ---      ---      ---      ---      ---      ---       93       66       51       36       48       30
         29       ---      ---      ---      ---      ---      ---       91       63       49       36       67       28
         30       ---      ---      ---      ---      ---      ---       91       59      e48       34       43       27
         31       ---      ---      ---      ---      ---      ---      ---       56      ---       35       38      ---

        TOTAL     ---      ---      ---      ---      ---      ---      ---     2585     1871     1324     1143      981
        MEAN      ---      ---      ---      ---      ---      ---      ---     83.4     62.4     42.7     36.9     32.7
        MAX       ---      ---      ---      ---      ---      ---      ---       95      119       56       67       38
        MIN       ---      ---      ---      ---      ---      ---      ---       56       47       34       25       27
        AC-FT     ---      ---      ---      ---      ---      ---      ---     5130     3710     2630     2270     1950

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1940 - 2000, BY WATER YEAR (WY)

        MEAN     66.6     44.4     21.3     12.0     9.16      127     1060      783      342      169      115     75.6
        MAX       600      454      216      120     68.9     1206     4950     4672     1933      814      960      432
        (WY)     1995     1995     1995     1995     1995     1995     1995     1974     1974     1970     1995     1944
        MIN      .042      .15     .000     .000     .000     .000     49.6     18.8     2.83      .74      .10     .000
        (WY)     1940     1941     1941     1940     1940     1940     1977     1940     1940     1940     1961     1940

        SUMMARY STATISTICS                  WATER YEARS 1940 - 2000

        ANNUAL MEAN                           238
        HIGHEST ANNUAL MEAN                  1146              1995
        LOWEST ANNUAL MEAN                      9.77           1940
        HIGHEST DAILY MEAN                  13800       Apr 18 1950
        LOWEST DAILY MEAN                        .00    Oct 14 1939
        ANNUAL SEVEN-DAY MINIMUM                 .00    Oct 14 1939
        INSTANTANEOUS PEAK FLOW           a 20400       Apr 18 1950
        INSTANTANEOUS PEAK STAGE             b 16.20    Apr 18 1950
        ANNUAL RUNOFF (AC-FT)              172100
        10 PERCENT EXCEEDS                    565
        50 PERCENT EXCEEDS                     39
        90 PERCENT EXCEEDS                      1.8

        a  From rating curve extended above 7,000 ft3/s on basis of contracted-opening measurement of peak flow
        
        
                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water year 1962-90, 1992-95, July to September 2000.


                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000


                                                            DIS-
                                                          CHARGE,   SPE-
                                                           INST.    CIFIC
                                                           CUBIC    CON-    TEMPER-  TEMPER-
                                                            FEET    DUCT-    ATURE    ATURE
                                         DATE      TIME     PER     ANCE      AIR     WATER
                                                           SECOND  (US/CM)  (DEG C)  (DEG C)
                                                          (00061)  (00095)  (00020)  (00010)

                                     JUL
                                       12...       1335     51       882     29.5     26.0
                                     AUG
                                       29...       1020     67       838     19.5     17.0

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