RED RIVER OF THE NORTH BASIN

                                               05060500  RUSH RIVER AT AMENIA, ND

LOCATION.--Lat 47o01'00", long 97o12'50", 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 good 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 1998 TO SEPTEMBER 1999
                                                        DAILY MEAN VALUES

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

           1       .00     13       32       e2.5     e2.0     e9.0      398     10        4.1      4.0      2.5     2.7
           2       .00     12       36       e2.5     e2.0     e6.0      635     10        2.5      4.2      2.3     4.1
           3       .04      9.5     33       e2.5     e2.0     e5.0      409      9.0      4.0      4.5      1.9     9.5
           4       .12      8.1     34       e2.5     e2.0     e4.8      335      8.9      3.8     28        1.5    13
           5      1.3       7.4     31       e2.4     e2.0     e4.6      452     12        4.6     42        1.2    19

           6      1.9       7.3     21       e2.4     e2.0     e4.5      323    e45        4.5     30        1.1    17
           7      7.5      e7.3     21       e2.3     e2.0     e4.4      217   e100        4.9     21        1.4    15
           8      6.1      e7.3     17       e2.3     e2.0     e4.3      162   e250        4.8     13        1.4     8.9
           9      4.0      e7.2     14       e2.2     e2.0     e4.2      110   e210        4.4      8.6      2.1     6.2
          10      2.8      e7.2     12       e2.2     e2.0     e4.2       76   e180        3.9      6.9      1.7     4.4

          11      2.9      e7.1     12       e2.2     e1.9     e4.2       55   e150        3.6      5.0      1.9     3.5
          12      4.2      e7.0     10       e2.2     e1.8     e4.2       41   e130        3.1      3.6      4.0     3.7
          13      7.8       7.0      9.9     e2.1     e1.8     e4.2       34   e110        2.8      3.2      3.9     4.6
          14      6.3       6.3     10       e2.1     e1.8     e4.2       31    e90        2.8      2.7      5.3     5.0
          15      4.7       6.2     10       e2.1     e1.8    e10         30    e80        2.6      2.0      5.8     4.4

          16      3.7       6.4    e10       e2.1     e1.8    e20         39    e60        2.4      2.0      4.6     3.5
          17     45         6.5     e9.0     e2.1     e1.8    e50         30    e50        2.3      1.6      3.2     3.1
          18    115         6.9     e9.0     e2.1     e1.7   e100         25    e45        2.3      1.7      2.5     2.2
          19     78        e6.8     e8.0     e2.1     e1.7   e200         21     34        2.0      1.3      1.9     1.6
          20     47        e6.5     e7.0     e2.1     e1.7   e500         19     23        2.2      1.3      1.5     1.6

          21     28        10       e6.0     e2.0     e1.7    750         18     17        2.2      1.4      1.3     1.7
          22     16         8.8     e5.0     e2.0     e1.8    686         18     14        2.0      1.4      1.4     1.3
          23     13         7.7     e4.0     e2.0     e1.8    614         17     12        2.0      1.5      2.3     1.3
          24     12         8.4     e3.8     e2.0     e1.8    419         15     10        1.8      1.4      1.4      .88
          25      8.5       9.1     e3.6     e2.0     e2.0    237         14      9.3      1.7      1.6      1.2     1.4

          26      8.9      10       e3.4     e2.0     e3.0    192         13      8.0      2.6      1.9      1.6     1.3
          27      7.2      11       e3.2     e2.0     e5.0    279         12      6.8      2.6      2.0      1.9     1.4
          28      6.8      12       e3.2     e2.0    e10      627         11      6.0      3.1      2.2      1.5     1.3
          29      7.6      14       e3.1     e2.0      ---    654         11      5.5      3.4      2.2      1.3     1.8
          30     12        21       e2.7     e2.0      ---    432         10      4.9      3.7      2.5      1.5     1.7
          31     14         ---     e2.6     e2.0      ---    359        ---      3.7      ---      2.7      1.4      ---

         TOTAL  472.36    265.0    386.5     67.0     64.9   6196.8     3581   1704.1     92.7    207.4     68.5   147.08
         MEAN     15.2     8.83     12.5     2.16     2.32      200      119     55.0     3.09     6.69     2.21     4.90
         MAX       115       21       36      2.5       10      750      635      250      4.9       42      5.8       19
         MIN       .00      6.2      2.6      2.0      1.7      4.2       10      3.7      1.7      1.3      1.1      .88
         AC-FT     937      526      767      133      129    12290     7100     3380      184      411      136      292

         STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1946 - 1999, BY WATER YEAR (WY)

         MEAN     2.24     1.20      .59      .18     1.81     29.7     71.9     14.1     12.3     11.8     1.33     2.26
         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 1998 CALENDAR YEAR        FOR 1999 WATER YEAR           WATER YEARS 1946 - 1999

         ANNUAL TOTAL                       14712.95                   13253.34
         ANNUAL MEAN                           40.3                       36.3                       12.4
         HIGHEST ANNUAL MEAN                                                                         62.9            1997
         LOWEST ANNUAL MEAN                                                                            .68           1977
         HIGHEST DAILY MEAN                   850     Feb 26             750     Mar 21            3160       Apr 19 1979
         LOWEST DAILY MEAN                       .00  Sep 11                .00  Oct  1                .00    Aug  1 1946
         ANNUAL SEVEN-DAY MINIMUM                .00  Sep 25               1.3   Sep 22                .00    Aug  1 1946
         INSTANTANEOUS PEAK FLOW                                        1060     Mar 21            3490       Apr 19 1979
         INSTANTANEOUS PEAK STAGE                                          9.62  Mar 21            a 12.15    Mar 23 1966
         INSTANTANEOUS LOW FLOW                                             .00  Oct  1                .00    Oct  1 1998
         ANNUAL RUNOFF (AC-FT)              29180                      26290                       9010
         10 PERCENT EXCEEDS                   126                         57                         16
         50 PERCENT EXCEEDS                     5.0                        4.4                         .10
         90 PERCENT EXCEEDS                      .24                       1.6                         .00

         a  Backwater from ice
         e  Estimated

                                                     WATER-QUALITY RECORDS

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


                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                 DIS-     PH       PH       SPE-
                               CHARGE,   WATER    WATER    CIFIC    SPE-                       HARD-             MAGNE-
                                INST.    WHOLE    WHOLE     CON-    CIFIC                      NESS    CALCIUM    SIUM,
                                CUBIC    FIELD     LAB     DUCT-    CON-    TEMPER-  TEMPER-   TOTAL    DIS-      DIS-
                                 FEET   (STAND-  (STAND-   ANCE     DUCT-    ATURE    ATURE    (MG/L    SOLVED   SOLVED
              DATE      TIME     PER      ARD      ARD      LAB     ANCE      AIR     WATER     AS      (MG/L    (MG/L
                                SECOND   UNITS)   UNITS)  (US/CM)  (US/CM)  (DEG C)  (DEG C)   CACO3)   AS CA)   AS MG)
                               (00061)  (00400)  (00403)  (90095)  (00095)  (00020)  (00010)  (00900)  (00915)  (00925)

          OCT
            23...       1005     12        --       --       --     1020      4.0      9.0       --       --       --
          DEC
            10...       0950     12        --       --       --     1500     -1.0      1.5       --       --       --
          FEB
            09...       1650      2.0      --       --       --     1480      2.0       .5       --       --       --
          MAR
            25...       1500    239       8.0       --      385      380       --      2.0      160       41      15
          APR
            10...       1400     74        --       --       --      750      5.5      6.5       --       --       --
          MAY
            06...       0930     43        --       --       --     1020     15.0     16.0       --       --       --
          JUN
            08...       1410      4.8      --       --       --     1360     28.0     24.0       --       --       --
          JUL
            15...       1125      1.8     8.0      8.2     1080     1100     32.0     26.0      510      110      56
          AUG
            26...       1355      1.5      --       --       --     1160     26.5     27.5       --       --       --


                                                                 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    SODIUM   (MG/L     AS      (MG/L    (MG/L    (MG/L     PER     SOLVED
                            AS K)            PERCENT   AS NA)   CACO3)   AS CL)   AS F)   AS SO4)    DAY)    (MG/L)
                           (00935)  (00931)  (00932)  (00930)  (90410)  (00940)  (00950)  (00945)  (70302)  (70300)

               OCT
                 23...        --       --       --       --       --       --       --       --       --       --
               DEC
                 10...        --       --       --       --       --       --       --       --       --       --
               FEB
                 09...        --       --       --       --       --       --       --       --       --       --
               MAR
                 25...       6.8       .4      12       11       123      5.9       .10      71    159        247
               APR
                 10...        --       --       --       --       --       --       --       --       --       --
               MAY
                 06...        --       --       --       --       --       --       --       --       --       --
               JUN
                 08...        --       --       --       --       --       --       --       --       --       --
               JUL
                 15...       8.6      1        18       51       278     10         .30     340      3.93     808
               AUG
                 26...        --       --       --       --       --       --       --       --       --       --


                           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
                 23...        --       --       --       --       --       --       --       --       --       --
               DEC
                 10...        --       --       --       --       --       --       --       --       --       --
               FEB
                 09...        --       --       --       --       --       --       --       --       --       --
               MAR
                 25...       225       2       60      <1.0      20       160      <.1     <1.0      <1       240
               APR
                 10...        --       --       --       --       --       --       --       --       --       --
               MAY
                 06...        --       --       --       --       --       --       --       --       --       --
               JUN
                 08...        --       --       --       --       --       --       --       --       --       --
               JUL
                 15...       743      10       20      <1.0      90        20       .1      3.0      <1       580
               AUG
                 26...        --       --       --       --       --       --       --       --       --       --



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