RED RIVER OF THE NORTH BASIN

                                               05060500  RUSH RIVER AT AMENIA, ND

LOCATION.--Lat 4701'00", long 9712'50", in SE1/4NW1/4 sec.24, T.141 N., R.52 W., Cass County, Hydrologic Unit 09020204, on
   left bank on downstream side of bridge on State Highway 18, and 0.6 mi north of Amenia.

DRAINAGE AREA.--116 mi2.

                                                    WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--July 1946 to current year.

REVISED RECORDS.--WSP 1728: Drainage area.

GAGE.--Water-stage recorder. Elevation of gage is 943 ft above sea level, from topographic map. See WSP 1913 for history of
   changes prior to June 10, 1961.

REMARKS.--Records fair except for discharges below 2.0 ft3/s and for periods of estimated discharge, which are poor.


                          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       2.3      1.3    e1.2      e.43     e.23    e26       13        7.7      6.8     16       1.9       .55
          2       2.0      1.2    e1.2      e.42     e.23    e25       12        7.3      6.6     12       1.5      1.0
          3       2.2      1.2    e1.2      e.41     e.23    e22        9.4      7.0      5.2     10       1.1      1.6
          4       2.6      1.2    e1.2      e.39     e.23    e20       10        6.5      5.6      9.0      .95     1.2
          5       2.5      1.1    e1.2      e.38     e.23    e19       12       e6.3      5.0      9.0      .98     1.1

          6       2.0      1.1    e1.2      e.37     e.22    e18       11       e6.0      4.7     13        .93     1.1
          7       1.8      1.2    e1.2      e.36     e.22    e16        8.4     e6.0      4.8     35        .91     1.0
          8       1.6      1.2    e1.2      e.35     e.22    e16        9.8     e6.0      4.2     27       1.0       .82
          9       1.6      1.2    e1.1      e.35     e.22    e16        7.5     e6.0      2.9     21        .93      .70
         10       1.3      1.2    e1.1      e.34     e.21    e15        6.7     e6.1      2.7     17        .87      .55

         11       1.2      1.2    e1.0      e.33     e.21    e14        8.6     e6.3      2.2     13       1.1       .43
         12       1.2      1.4    e1.0      e.32     e.21     13        7.7     e6.5     e2.0     11       1.1       .36
         13       1.1      1.2     e.95     e.31     e.20     14        9.6     e6.8     e1.5      9.1     1.0       .34
         14       1.2      1.0     e.90     e.30     e.20      9.9     12       e7.0     e1.0      7.8      .93      .35
         15       1.3      1.0     e.86     e.30     e.20      8.7     11       e7.3     e1.2      6.7      .84      .27

         16       1.4      1.1     e.83     e.29     e.20      9.3      9.7     e7.5     e1.4      5.5     1.5       .19
         17       1.6      1.1     e.78     e.28     e.20      7.8     11       e7.5     e2.5      4.4     2.1       .23
         18       1.7      1.1     e.75     e.27     e.20      6.6     13       e7.0     e3.0      4.5     1.1       .17
         19       1.7      1.2     e.74     e.26     e.20      6.4     14       e6.5     e3.5      5.8      .96      .14
         20       1.6      1.2     e.70     e.26     e.20      7.6     15       e6.0   e800        5.0     1.2       .15

         21       1.6      1.2     e.68     e.25     e.20      8.8     14       e5.5   e880        4.2     1.6       .16
         22       1.6     e1.2     e.65     e.25     e.21      9.3     12       e5.0    463        4.2     1.4       .49
         23       1.7     e1.3     e.62     e.24     e.23     16       11       e4.7    180        3.6      .56      .63
         24       1.6     e1.2     e.58     e.24     e.27     40       10       e4.5     88        3.4     1.7       .47
         25       1.5     e1.2     e.56     e.24     e.50     65       10       e4.3     63        3.0     1.7      1.1

         26       1.5     e1.1     e.54     e.23    e2.0      52        9.6     e4.1     74        2.7     1.2      1.5
         27       1.5     e1.1     e.52     e.23   e20        40        8.7      4.1     64        2.6     1.0      1.1
         28       1.4     e1.2     e.50     e.23   e25        32        8.4      4.3     41        2.4      .73      .92
         29       1.5     e1.2     e.48     e.23   e26        26        7.6      4.7     29        2.7      .48      .80
         30       1.8     e1.2     e.46     e.23      ---     22        8.1      5.5     21        2.2      .36      .51
         31       1.8      ---     e.45     e.23      ---     18        ---      6.2      ---      1.8      .55      ---

        TOTAL    51.4     35.3    26.35     9.32    78.67    619.4    310.8    186.2   2769.8    274.6    34.18    19.93
        MEAN     1.66     1.18      .85      .30     2.71     20.0     10.4     6.01     92.3     8.86     1.10      .66
        MAX       2.6      1.4      1.2      .43       26       65       15      7.7      880       35      2.1      1.6
        MIN       1.1      1.0      .45      .23      .20      6.4      6.7      4.1      1.0      1.8      .36      .14
        AC-FT     102       70       52       18      156     1230      616      369     5490      545       68       40

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1946 - 2000, BY WATER YEAR (WY)

        MEAN     2.23     1.20      .59      .18     1.82     29.5     70.8     13.9     13.8     11.7     1.32     2.23
        MAX      50.7     8.83     12.5     2.84     84.2      200      531     81.3      123      168     22.3     47.3
        (WY)     1995     1999     1999     1997     1998     1999     1997     1950     1998     1993     1993     1996
        MIN      .000     .000     .000     .000     .000     .000     1.12      .12     .009     .000     .000     .000
        (WY)     1949     1953     1950     1947     1947     1948     1981     1955     1988     1955     1946     1946

        SUMMARY STATISTICS           FOR 1999 CALENDAR YEAR        FOR 2000 WATER YEAR           WATER YEARS 1946 - 2000

        ANNUAL TOTAL                       12242.53                    4415.95
        ANNUAL MEAN                           33.5                       12.1                       12.4
        HIGHEST ANNUAL MEAN                                                                         62.9            1997
        LOWEST ANNUAL MEAN                                                                            .68           1977
        HIGHEST DAILY MEAN                   750     Mar 21             880     Jun 21            3160       Apr 19 1979
        LOWEST DAILY MEAN                       .45  Dec 31                .14  Sep 19                .00    Aug  1 1946
        ANNUAL SEVEN-DAY MINIMUM                .50  Dec 25                .19  Sep 15                .00    Aug  1 1946
        INSTANTANEOUS PEAK FLOW                                        1100     Jun 21            3490       Apr 19 1979
        INSTANTANEOUS PEAK STAGE                                       a 10.05  Jun 21            b 12.15    Mar 23 1966
        INSTANTANEOUS LOW FLOW                                                                        .00    Oct  1 1998
        ANNUAL RUNOFF (AC-FT)              24280                       8760                       9000
        10 PERCENT EXCEEDS                    50                         16                         16
        50 PERCENT EXCEEDS                     2.1                        1.5                         .10
        90 PERCENT EXCEEDS                     1.2                         .24                        .00

        a  From floodmark
        b  Backwater from ice
        e  Estimated
        
        
                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water year 1972 to current year.


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

                                DIS-     DIS-     PH       SPE-
                              CHARGE,  CHARGE,   WATER    CIFIC    SPE-                       HARD-             MAGNE-
                                 IN     INST.    WHOLE     CON-    CIFIC                      NESS    CALCIUM    SIUM,
                               CUBIC    CUBIC    FIELD    DUCT-    CON-    TEMPER-  TEMPER-   TOTAL    DIS-      DIS-
                                FEET     FEET   (STAND-   ANCE     DUCT-    ATURE    ATURE    (MG/L    SOLVED   SOLVED
             DATE      TIME     PER      PER      ARD      LAB     ANCE      AIR     WATER     AS      (MG/L    (MG/L
                               SECOND   SECOND   UNITS)  (US/CM)  (US/CM)  (DEG C)  (DEG C)   CACO3)   AS CA)   AS MG)
                              (00060)  (00061)  (00400)  (90095)  (00095)  (00020)  (00010)  (00900)  (00915)  (00925)

         OCT
           06...       1010      --      1.8       --       --      937      3.5      6.0       --       --       --
         NOV
           17...       1425      --      1.1       --       --     1300      7.5      5.0       --       --       --
         DEC
           29...       0850      .48      --       --       --     1320      1.5      1.0       --       --       --
         FEB
           29...       1450      --     26         --       --     1050      4.0       .5       --       --       --
         MAR
           28...       0835      --     32         --       --      895       .0      2.5       --       --       --
         MAY
           04...       1200      --      6.5      8.4       --     1190       --       --      680      150     73.0
         JUL
           28...       1035      --      2.4       --       --     1150       --     26.0       --       --       --
         AUG
           22...       1235      --      1.6      8.4     1280     1240     25.0     19.5      600      130     66.0


                                                                ANC                                        SOLIDS,
                           POTAS-   SODIUM                    UNFLTRD   CHLO-    FLUO-            SOLIDS,  RESIDUE
                            SIUM,     AD-   SODIUM,           TIT 4.5   RIDE,    RIDE,   SULFATE    DIS-   AT 180
                            DIS-    SORP-    DIS-               LAB     DIS-      DIS-    DIS-     SOLVED   DEG. C
                           SOLVED    TION   SOLVED             (MG/L    SOLVED   SOLVED   SOLVED   (TONS     DIS-
                  DATE     (MG/L    RATIO    (MG/L    SODIUM    AS      (MG/L    (MG/L    (MG/L     PER     SOLVED
                           AS K)             AS NA)  PERCENT   CACO3)   AS CL)   AS F)   AS SO4)    DAY)    (MG/L)
                          (00935)  (00931)  (00930)  (00932)  (90410)  (00940)  (00950)  (00945)  (70302)  (70300)

              OCT
                06...        --       --       --       --       --       --       --       --       --       --
              NOV
                17...        --       --       --       --       --       --       --       --       --       --
              DEC
                29...        --       --       --       --       --       --       --       --       --       --
              FEB
                29...        --       --       --       --       --       --       --       --       --       --
              MAR
                28...        --       --       --       --       --       --       --       --       --       --
              MAY
                04...      10.0       1      69.0      18       346     22.0       .2      420     17.6     1010
              JUL
                28...        --       --       --       --       --       --       --       --       --       --
              AUG
                22...      11.0       1      64.0      19       275     22.0       .3      430      4.15     944


                          SOLIDS,
                          SUM OF                                        MANGA-            MOLYB-   SELE-    STRON-
                          CONSTI-  ARSENIC   IRON,    LEAD,   LITHIUM   NESE,   MERCURY   DENUM,   NIUM,     TIUM,
                          TUENTS,    DIS-     DIS-     DIS-     DIS-     DIS-     DIS-     DIS-     DIS-     DIS-
                            DIS-    SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED
                  DATE     SOLVED   (UG/L    (UG/L    (UG/L    (UG/L    (UG/L    (UG/L    (UG/L    (UG/L    (UG/L
                           (MG/L)   AS AS)   AS FE)   AS PB)   AS LI)   AS MN)   AS HG)   AS MO)   AS SE)   AS SR)
                          (70301)  (01000)  (01046)  (01049)  (01130)  (01056)  (71890)  (01060)  (01145)  (01080)

              OCT
                06...        --       --       --       --       --       --       --       --       --       --
              NOV
                17...        --       --       --       --       --       --       --       --       --       --
              DEC
                29...        --       --       --       --       --       --       --       --       --       --
              FEB
                29...        --       --       --       --       --       --       --       --       --       --
              MAR
                28...        --       --       --       --       --       --       --       --       --       --
              MAY
                04...       953      8.0      60        1       120      220       .1       1      <1.0      680
              JUL
                28...        --       --       --       --       --       --       --       --       --       --
              AUG
                22...       889     15.0      80       <1       110       60      <.1       6       1.0      600

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