SHELL CREEK BASIN

                                       06332523  EAST FORK SHELL CREEK NEAR PARSHALL, ND

LOCATION.--Lat 4756'55", long 10212'52", in NW1/4NW1/4NW1/4 sec.33, T.152 N., R.90 W., Mountrail County, Hydrologic Unit
   10110101, on right bank 10 ft upstream from bridge on county road and 4 mi west of Parshall.

DRAINAGE AREA.--360 mi2.

                                                    WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--July 1991 to current year.

GAGE.--Water-stage recorder. Elevation of gage is 1,890 ft above sea level, from topographic map.

REMARKS.--Records poor due to beaver activity.

                          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      e.12     e2.1     3.6      e.60     e.60     e2.0     e3.4     e2.7     5.5      1.1       .68     e.65
          2      e.15      2.1     3.5      e.50     e.60     e3.0     e3.3     e2.7     5.5      1.0     e1.5      e.60
          3      e.20      2.0     3.7      e.40     e.60     e5.0     e3.3     e2.7     4.1       .88    e1.0      e.55
          4      e.30      2.2     3.7      e.45     e.60    e10       e3.3     e2.7     2.8       .79     e.75     e.50
          5      e.50      2.3     3.6      e.50     e.60     e8.0     e3.2     e2.7     1.9       .85     e.55     e.54

          6     e1.0       2.4     3.7      e.50     e.65     e7.0     e3.1     e2.8     1.3       .95     e.45     e.45
          7     e1.2       2.5     3.6      e.50     e.70     e6.0     e3.1     e3.0     1.2      1.2      e.43     e.40
          8     e1.5       2.7    e3.0      e.50     e.50     e5.0     e3.0     e5.0     1.3      1.4      e.38     e.35
          9     e1.5       2.8    e2.5      e.50     e.40     e4.5     e3.0    e10       1.4      1.6      e.31     e.30
         10     e1.5       2.9    e2.0      e.50     e.41     e4.1     e3.0    e14       1.3      1.5      e.27     e.30

         11     e1.5       3.0    e1.5      e.50     e.42     e3.8     e2.9     19       1.4      1.5      e.25     e.28
         12     e1.5       3.0    e1.0      e.50     e.43     e3.5     e2.8     27       1.4      1.3      e.29     e.26
         13     e1.5       3.0     e.60     e.50     e.44     e3.3     e2.7     21       1.4      1.2      e.41     e.25
         14     e1.5       3.1     e.45     e.52     e.45     e2.9     e2.6     16       1.1      1.0      e.64     e.24
         15     e1.6       4.3     e.50     e.55     e.46     e3.0     e2.6     14       1.0      1.0      e.78     e.22

         16     e1.6       4.8     e.50     e.55     e.47     e3.3     e2.6     11        .99      .98     e.70     e.20
         17     e1.7       3.9     e.50     e.55     e.48     e3.5     e2.7      9.0     1.5       .95     e.62     e.19
         18     e1.8       3.4     e.50     e.60     e.49     e3.7     e3.0      9.4     2.9       .83     e.56     e.18
         19     e1.8       3.3     e.50     e.60     e.50     e3.9     e3.1      9.7     3.7       .77     e.52     e.17
         20     e1.8       3.4     e.55     e.60     e.50     e4.4     e3.1      6.9     5.0       .73     e.50     e.16

         21     e1.8       3.6     e.65     e.60     e.50     e4.5     e3.1      4.6     5.2       .95     e.48     e.20
         22     e1.8       3.6     e.70     e.60     e.50     e4.5     e3.0      3.5     5.5       .93     e.43     e.35
         23     e1.8       3.4     e.80     e.60     e.50     e4.5     e3.0      2.9     6.2       .92     e.40     e.32
         24     e1.8       3.3     e.80     e.60     e.50     e4.4     e3.0      2.9     5.7       .91     e.35     e.30
         25     e1.9       3.5     e.80     e.60     e.52     e4.1     e3.0      2.8     5.6       .83     e.30     e.28

         26     e2.0       3.4     e.78     e.60     e.60     e3.9     e2.9      2.4     5.6       .81     e.27     e.26
         27     e2.0       3.4     e.78     e.60    e1.0      e3.8     e2.9      2.1     6.8       .74     e.25     e.25
         28     e2.0       3.3     e.80     e.60    e1.2      e3.7     e2.8      1.9     5.7       .65     e.22     e.24
         29     e2.1       3.2     e.78     e.60    e1.5      e3.6     e2.8      1.6     4.0       .59     e.20     e.24
         30     e2.1       3.2     e.75     e.60      ---     e3.5     e2.7      1.2     1.1       .62     e.18     e.24
         31      2.1       ---     e.70     e.60      ---     e3.4      ---      1.8      ---      .67     e.34      ---

        TOTAL   45.67     93.1    47.84    17.02    17.12    133.8     89.0    219.0    98.09    30.15    15.01     9.47
        MEAN     1.47     3.10     1.54      .55      .59     4.32     2.97     7.06     3.27      .97      .48      .32
        MAX       2.1      4.8      3.7      .60      1.5       10      3.4       27      6.8      1.6      1.5      .65
        MIN       .12      2.0      .45      .40      .40      2.0      2.6      1.2      .99      .59      .18      .16
        AC-FT      91      185       95       34       34      265      177      434      195       60       30       19

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1991 - 2000, BY WATER YEAR (WY)

        MEAN     1.72     1.88     1.09      .43     1.03     43.8     17.7     5.59     5.41     3.87     1.72      .94
        MAX      4.71     3.10     1.54     1.22     3.58      134     64.9     16.0     16.4     23.5     11.6     2.66
        (WY)     1995     2000     2000     1995     1995     1999     1996     1999     1998     1993     1993     1991
        MIN       .26      .82      .39     .094      .13     4.32     2.97     1.64      .66      .42      .19      .12
        (WY)     1993     1998     1997     1999     1999     2000     2000     1992     1992     1992     1992     1997

        SUMMARY STATISTICS           FOR 1999 CALENDAR YEAR        FOR 2000 WATER YEAR           WATER YEARS 1991 - 2000

        ANNUAL TOTAL                        5519.96                     815.27
        ANNUAL MEAN                           15.1                        2.23                       7.18
        HIGHEST ANNUAL MEAN                                                                         15.1            1999
        LOWEST ANNUAL MEAN                                                                           2.19           1992
        HIGHEST DAILY MEAN                   930     Mar 27              27     May 12             930       Mar 27 1999
        LOWEST DAILY MEAN                       .07  Jan  4                .12  Oct  1                .00    Sep  2 1991
        ANNUAL SEVEN-DAY MINIMUM                .08  Jan  3                .19  Sep 15                .00    Sep 10 1998
        INSTANTANEOUS PEAK FLOW                                          31     May 12            1170       Mar 27 1999
        INSTANTANEOUS PEAK STAGE                                        a 5.05  May 12               6.46    Mar 27 1997
        ANNUAL RUNOFF (AC-FT)              10950                       1620                       5200
        10 PERCENT EXCEEDS                    14                          4.4                        8.8
        50 PERCENT EXCEEDS                     1.8                        1.4                        1.3
        90 PERCENT EXCEEDS                      .11                        .35                        .17

        a  Backwater from beaver dam
        e  Estimated
        
        
                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water year 1991 to current year.

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

                                DIS-    BARO-   OXYGEN,             PH       PH       SPE-
                              CHARGE,   METRIC    DIS-             WATER    WATER    CIFIC    SPE-
                               INST.    PRES-    SOLVED            WHOLE    WHOLE     CON-    CIFIC
                               CUBIC     SURE    (PER-   OXYGEN,   FIELD     LAB     DUCT-    CON-    TEMPER-  TEMPER-
                                FEET     (MM      CENT     DIS-   (STAND-  (STAND-   ANCE     DUCT-    ATURE    ATURE
             DATE      TIME     PER       OF     SATUR-   SOLVED    ARD      ARD      LAB     ANCE      AIR     WATER
                               SECOND    HG)     ATION)   (MG/L)   UNITS)   UNITS)  (US/CM)  (US/CM)  (DEG C)  (DEG C)
                              (00061)  (00025)  (00301)  (00300)  (00400)  (00403)  (90095)  (00095)  (00020)  (00010)

         NOV
           02...       1130    1.4       707       --     12.3      8.5      8.4     3690       --     12.0      3.6
         DEC
           16...       1115     .50       --       --       --       --       --       --       --       --       --
         FEB
           23...       1230     .50      703       --       --       --       --       --       --     12.0       --
         APR
           04...       1330    3.5       702       --     11.4      8.7      8.4     3000       --     16.0      5.5
         JUN
           08...       1115    1.1       705       --      5.9      8.4      8.2     3920       --     25.0     20.8
         AUG
           30...       1215     .18       --       --      4.8       --      8.4     3180     3090     17.9       --
         SEP
           26...       1400     .26      711      95       9.5       --      8.3     3020     3020     23.0     11.6


                                                                                      ANC
                      HARD-             MAGNE-   POTAS-   SODIUM                    UNFLTRD   CHLO-    FLUO-   SILICA,
                      NESS    CALCIUM    SIUM,    SIUM,     AD-   SODIUM,           TIT 4.5   RIDE,    RIDE,    DIS-
                      TOTAL    DIS-      DIS-     DIS-    SORP-    DIS-               LAB     DIS-      DIS-    SOLVED
                      (MG/L    SOLVED   SOLVED   SOLVED    TION   SOLVED             (MG/L    SOLVED   SOLVED   (MG/L
             DATE      AS      (MG/L    (MG/L    (MG/L    RATIO    (MG/L    SODIUM    AS      (MG/L    (MG/L     AS
                      CACO3)   AS CA)   AS MG)   AS K)             AS NA)  PERCENT   CACO3)   AS CL)   AS F)    SIO2)
                     (00900)  (00915)  (00925)  (00935)  (00931)  (00930)  (00932)  (90410)  (00940)  (00950)  (00955)

         NOV
           02...       530     69.7      85.6    14.0      14       760      75       761     22.6       .4     10.9
         DEC
           16...        --       --       --       --       --       --       --       --       --       --       --
         FEB
           23...        --       --       --       --       --       --       --       --       --       --       --
         APR
           04...       450     66.5      69.7     9.9      11       527      71       617     15.4       .3      9.4
         JUN
           08...       750     89.4     127      13.5      12       748      68       673     22.6       .3      7.8
         AUG
           30...       360     42.0      61.7    10.9      15       642      79       778     20.9       .4     12.5
         SEP
           26...       390     46.7      64.9    10.1      14       625      77       741     22.4       .4     13.6


                               NITRO-   NITRO-   NITRO-   PHOS-            SOLIDS,  SOLIDS,
                                GEN,     GEN,     GEN,   PHORUS   SOLIDS,  RESIDUE  SUM OF
                     SULFATE  AMMONIA  NITRITE  NO2+NO3   ORTHO,    DIS-   AT 180   CONSTI-  ARSENIC   BORON,   IRON,
                      DIS-      DIS-     DIS-     DIS-    DIS-     SOLVED   DEG. C  TUENTS,    DIS-     DIS-     DIS-
                      SOLVED   SOLVED   SOLVED   SOLVED  SOLVED    (TONS     DIS-     DIS-    SOLVED   SOLVED   SOLVED
             DATE     (MG/L    (MG/L    (MG/L    (MG/L   (MG/L      PER     SOLVED   SOLVED   (UG/L    (UG/L    (UG/L
                     AS SO4)   AS N)    AS N)    AS N)   AS P)      DAY)    (MG/L)   (MG/L)   AS AS)   AS B)    AS FE)
                     (00945)  (00608)  (00613)  (00631)  (00671)  (70302)  (70300)  (70301)  (01000)  (01020)  (01046)

         NOV
           02...      1340     <.020    <.010    <.050     .010    10.8     2770     2760      2.0      602      <30
         DEC
           16...        --       --       --       --       --       --       --       --       --       --       --
         FEB
           23...        --       --       --       --       --       --       --       --       --       --       --
         APR
           04...      1000     <.020    <.010    <.050     .053    20.0     2120     2070      2.0      463      <30
         JUN
           08...      1540      .060    <.010    <.050     .137     8.85    3040     2960      5.4      619      E30
         AUG
           30...       970      .027    <.010     .055     .105     1.06    2230     2230      7.2      768       80
         SEP
           26...       906       --       --       --       --      1.51    2160     2140      4.0      716       40


                                                                                    TRIAZIN  
                                        MANGA-            MOLYB-   SELE-    STRON-  SCREEN   
                      LEAD,   LITHIUM   NESE,   MERCURY   DENUM,   NIUM,     TIUM,  (ELISA)  CARBO-   CYANA- 
                       DIS-     DIS-     DIS-     DIS-     DIS-     DIS-     DIS-   WAT,WH   FURAN,    ZINE,    2,4-D
                      SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED  REC,AS   SCREEN,  SCREEN,  SCREEN,
             DATE     (UG/L    (UG/L    (UG/L    (UG/L    (UG/L    (UG/L    (UG/L   ATRAZIN   TOTAL    TOTAL    TOTAL
                      AS PB)   AS LI)   AS MN)   AS HG)   AS MO)   AS SE)   AS SR)  (UG/L)   (UG/L)   (UG/L)   (UG/L) 
                     (01049)  (01130)  (01056)  (71890)  (01060)  (01145)  (01080)  (34757)  (99902)  (99904)  (99906)

         NOV
           02...       <1       170       13      <.2       2      <2.4     1520      <.1       --      <.04    <.700
         DEC
           16...        --       --       --       --       --       --       --       --       --       --       --
         FEB
           23...        --       --       --       --       --       --       --       --       --       --       --
         APR
           04...       E1       133       39      <.2      <1      <2.4     1370      <.1      <.06     <.04    <.700
         JUN
           08...       <1       201      328      <.2      <1      <2.4     2000      <.1      <.06     <.04    <.700
         AUG
           30...       <1       131       77      1.0       2      <2.4      829      <.1       .07     <.04     .900
         SEP
           26...       <1       136       82      <.2       1      <2.4      939      <.1      <.06     <.04     .900

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