LITTLE MISSOURI RIVER BASIN

                                            06336600  BEAVER CREEK NEAR TROTTERS, ND

LOCATION.--Lat 4709'47", long 10359'32", in SW1/4SW1/4NE1/4 sec.33, T.143 N., R.105 W., Golden Valley County, Hydrologic Unit
   10110204, on left bank 100 ft upstream from bridge on county road, 2.4 mi east of Montana-North Dakota State line, 13 mi
   southwest of Trotters, 17 mi north of Beach, 20 mi upstream from Elk Creek, and 27 mi above mouth.

DRAINAGE AREA.--616 mi2.

                                                    WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1977 to current year (seasonal records only since 1984).

REVISED RECORDS.--1982: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 2,370 ft above sea level, from topographic map.

REMARKS.--Records fair except for periods of estimated discharge, which are poor.

EXTREMES FOR CURRENT YEAR.--Maximum discharge, 26 ft3/s, Mar. 7, gage height, 3.66 ft, backwater from ice; minimum daily
   discharge, no flow for many days in July to September.

                          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       1.0      ---      ---      ---     e1.0    e10        5.6     4.6      1.1      e.06      .00      .00
          2       1.0      ---      ---      ---     e1.0     e8.0      6.9     4.2      1.1      e.06      .00      .00
          3       1.2      ---      ---      ---     e1.0     e7.5      7.5     3.7       .86     e.05      .00      .00
          4       1.2      ---      ---      ---     e1.0     e7.5      7.3     3.3       .42     e.04      .00      .00
          5       1.2      ---      ---      ---     e1.0      7.6      7.4     4.6       .33     e.03      .00      .00

          6       1.3      ---      ---      ---     e1.0      8.3      7.3     4.5       .23     e.02      .00      .00
          7       ---      ---      ---      ---     e1.0     13        6.5     5.9       .13     e.03      .00      .00
          8       ---      ---      ---      ---     e1.0      9.7      6.7     5.9      e.10     e.03      .00      .00
          9       ---      ---      ---      ---     e1.0      8.7      6.3     6.4      e.09     e.05      .00      .00
         10       ---      ---      ---      ---     e1.0      7.0      6.2     5.8      e.08     e.10      .00      .00

         11       ---      ---      ---      ---     e1.0      6.1      6.0     5.6       .07     e.15      .00      .00
         12       ---      ---      ---      ---     e1.0      5.9      5.4     5.4       .38     e.20      .00      .00
         13       ---      ---      ---      ---     e1.0      5.8      5.3     5.4       .43     e.20      .00      .00
         14       ---      ---      ---      ---     e1.0      5.7      6.2     5.1       .44     e.15      .00      .00
         15       ---      ---      ---      ---     e1.0      5.8      6.5     4.9      1.2      e.10      .00      .00

         16       ---      ---      ---      ---     e1.0      5.7      6.7     4.6      1.2      e.10      .00      .00
         17       ---      ---      ---      ---     e1.0      5.8      7.2     4.1      1.3      e.50      .00      .00
         18       ---      ---      ---      ---     e1.0      6.1      7.6     3.7      1.3     e2.0       .00      .00
         19       ---      ---      ---      ---     e1.0      5.8      7.0     3.3      1.2     e1.5       .00      .03
         20       ---      ---      ---      ---     e1.0      5.0      6.6     3.3      1.2     e1.0       .00      .21

         21       ---      ---      ---      ---     e1.0      4.4      6.6     3.0      1.0      e.70      .00      .45
         22       ---      ---      ---      ---     e1.0      4.6      6.1     2.8       .90     e.50      .00      .92
         23       ---      ---      ---      ---     e2.0      4.4      5.4     2.3       .58      .28      .00     1.1
         24       ---      ---      ---      ---     e5.0      4.4     e5.2     2.0       .38      .18      .00      .76
         25       ---      ---      ---      ---     e6.0      4.4     e5.1     1.5       .21      .09      .00     e.40

         26       ---      ---      ---      ---    e10        4.5     e5.1     1.5       .15      .11      .00     e.10
         27       ---      ---      ---      ---     e9.0      4.9     e5.1     1.6       .16      .04      .00     e.04
         28       ---      ---      ---      ---     e8.0      4.8      5.1     1.5       .07      .02      .00     e.00
         29       ---      ---      ---      ---     e7.0      4.8      4.9     1.6       .07      .00      .00     e.00
         30       ---      ---      ---      ---      ---      5.7      4.9     1.5      e.06      .00      .00     e.00
         31       ---      ---      ---      ---      ---      5.6      ---      .95      ---      .00      .00      ---

        TOTAL     6.9      ---      ---      ---     69.0    197.5    185.7   114.55    16.74     8.29     0.00     4.01
        MEAN     1.15      ---      ---      ---     2.38     6.37     6.19     3.70      .56      .27     .000      .13
        MAX       1.3      ---      ---      ---       10       13      7.6      6.4      1.3      2.0      .00      1.1
        MIN       1.0      ---      ---      ---      1.0      4.4      4.9      .95      .06      .00      .00      .00
        AC-FT      14      ---      ---      ---      137      392      368      227       33       16      .00      8.0

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1978 - 2000, BY WATER YEAR (WY)

        MEAN     1.10     2.62     2.59     4.40     30.0      109     49.1     16.5     16.7     10.8     2.25      .75
        MAX      3.29     6.34     5.13     14.7      141      609      406     50.2      125     64.2     18.4     4.72
        (WY)     1983     1983     1979     1983     1983     1978     1979     1999     1982     1997     1993     1986
        MIN      .006     .010     .032     .000     .000     1.21     1.11     1.05      .12     .000     .000     .000
        (WY)     1982     1982     1982     1982     1989     1991     1991     1981     1992     1988     1985     1981

        SUMMARY STATISTICS                  WATER YEARS 1978 - 2000

        ANNUAL MEAN                          a 33.3
        HIGHEST ANNUAL MEAN                  a 79.7            1978
        LOWEST ANNUAL MEAN                    a 2.77           1981
        HIGHEST DAILY MEAN                   2500       Mar 22 1978
        LOWEST DAILY MEAN                        .00    Aug  1 1981
        ANNUAL SEVEN-DAY MINIMUM                 .00    Aug 10 1981
        INSTANTANEOUS PEAK FLOW              2720       Mar 29 1978
        INSTANTANEOUS PEAK STAGE             b 19.27    Mar 22 1978
        ANNUAL RUNOFF (AC-FT)             a 24110
        10 PERCENT EXCEEDS                     40
        50 PERCENT EXCEEDS                      3.3
        90 PERCENT EXCEEDS                       .00

        a  Based on complete water years only (1978-83)
        b  Backwater from ice
        e  Estimated
        
        
                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water year 1978 to current year.

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

                                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
           07...       1210     1.3       --       --       --     2500     17.0      8.5       --       --       --
         MAR
           01...       1215     9.6       --       --       --     2600      8.5       .5       --       --       --
           15...       1330     5.8       --       --       --     2190     -1.5       .7       --       --       --
           28...       1600     4.9      8.5      8.3     2180     2210     14.0      8.3      540     90.0     77.0
         APR
           25...       1040     5.1       --       --       --     2580     13.0     12.2       --       --       --


                                                                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
                07...        --       --       --       --       --       --       --       --       --       --
              MAR
                01...        --       --       --       --       --       --       --       --       --       --
                15...        --       --       --       --       --       --       --       --       --       --
                28...       8.3       6       340      57       357      9.2       .2      910     21.7     1650
              APR
                25...        --       --       --       --       --       --       --       --       --       --


                          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
                07...        --       --       --       --       --       --       --       --       --       --
              MAR
                01...        --       --       --       --       --       --       --       --       --       --
                15...        --       --       --       --       --       --       --       --       --       --
                28...      1650     <1.0      40       <1      40.0      50       <.1      <1      <1.0     1200
              APR
                25...        --       --       --       --       --       --       --       --       --       --

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