JAMES RIVER BASIN

                                 06471200  MAPLE RIVER AT NORTH DAKOTA-SOUTH DAKOTA STATE LINE

LOCATION.--Lat 4556'20", long 9827'08", in SW1/4 SE1/4 sec.33, T.129 N., R.62 W., Dickey County, ND, Hydrologic Unit 10160004,
   on left bank 0.4 mi upstream from State line, 7.8 mi northeast of Frederick, SD, and 15.7 mi upstream from mouth.

DRAINAGE AREA.--716 mi2, of which about 332 mi2 is probably noncontributing.

PERIOD OF RECORD.--June 1956 to current year.

REVISED RECORDS.--WDR SD-86-1: Drainage area.

GAGE.--Water-stage recorder. Elevation of gage is 1,365 ft above sea level, from topographic map. Prior to June 14, 1962,
   nonrecording gage at site 0.4 mi downstream at datum 0.94 ft lower.

REMARKS.--Records good except those for estimated daily discharges, which are fair. Satellite data-collection platform at
   station. Water temperature and specific conductance measured during the year are compiled in the Miscellaneous Temperature
   Measurements and Field Determinations section.

                          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      23        9.9      7.4      4.8      1.9       38       85       30     11        2.8     8.1       .37
          2      21       10        7.4      4.7      2.2      141       75       27     10       20       5.9       .34
          3      20       10        7.2      4.6      2.6      207       66       28     10       12       5.7       .36
          4      19        9.5     e7.1      4.1      2.4      178       55       28     12        8.4     4.9       .36
          5      18        9.8      7.0      4.0      2.3      128       54       28     11        7.9     5.3       .36

          6      17        9.0      6.8      3.8      2.4       94       49       32     10        5.4     4.9       .38
          7      16        8.1      6.6      3.5      2.5       69       46       32      9.8      5.0     4.0       .41
          8      15        7.9      6.6      3.5      2.6       67       40       36      8.3      4.6     3.4       .32
          9      15        8.3      6.5      3.4      2.8       30       39       31      7.0      4.5     2.5       .29
         10      15        7.6      6.4      3.4      2.7       42       36       29      6.9     21       1.8       .23

         11      14        7.3      6.5      3.3      2.4       49       34       28      5.7     43       1.5       .22
         12      13        6.8      6.4      3.5      2.2       40       31       25      4.8     66       1.5       .14
         13      12        6.5      6.3      3.2      2.2       36      e30       26      3.7     92        .80      .12
         14      12        6.0      6.5      3.0      2.0       33      e30       25      4.4     87       1.1       .11
         15      11        6.6      6.1      3.0      2.2       30      e29       27      4.5     70       1.1       .07

         16      11        6.7      5.8      3.1      2.0       28       28       27      5.1     54        .96      .06
         17      11        6.6      5.2      2.9      2.0       27       26       30      4.8     44       1.2       .06
         18      12       13        5.2      2.8      2.1       29       26       26      4.4     47        .89      .05
         19      13       13       e5.0      2.9      2.3       33       28       22      4.0     47        .82      .05
         20      13       11       e4.7      2.7      2.1       39       28       21      4.6     44       1.1       .04

         21      13       10       e4.4      2.7      2.0       46       28       20      4.3     39       1.5       .03
         22      13        9.5     e4.1      2.7      2.0       59       29       20      4.2     35       1.3       .10
         23      13        9.2     e3.9      2.7      2.3       97       27       17      5.0     31       1.1       .09
         24      12        8.8      3.9      2.4      3.7      160       27       16      4.7     28        .67      .06
         25      12        8.5      4.0      2.3      6.0      226       29       13      5.0     24        .60      .06

         26      11        8.5      4.1      2.2      9.5      233       33       12      4.3     21        .45      .05
         27      12        8.2      4.2      2.0      9.3      220       36       12      4.0     17        .38      .04
         28      11        7.7      4.4      2.0     12        179       33       12      3.9     15        .41      .03
         29      13        7.0      4.6      2.1     16        145       30       11      3.3     12        .31      .03
         30      12        6.9      4.8      2.0      ---      120       31       11      3.0     11        .28      .02
         31       9.8      ---      4.8      2.0      ---      103      ---       10      ---      9.6      .67      ---

        TOTAL   432.8    257.9    173.9     95.3    108.7     2926     1138      712    183.7    928.2    65.14     4.85
        MEAN     14.0     8.60     5.61     3.07     3.75     94.4     37.9     23.0     6.12     29.9     2.10      .16
        MAX        23       13      7.4      4.8       16      233       85       36       12       92      8.1      .41
        MIN       9.8      6.0      3.9      2.0      1.9       27       26       10      3.0      2.8      .28      .02
        AC-FT     858      512      345      189      216     5800     2260     1410      364     1840      129      9.6

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1957 - 2000, BY WATER YEAR (WY)

        MEAN     3.22     2.11     2.10      .36     1.00     89.6      112     40.3     17.9     31.3     6.59     3.81
        MAX      68.8     50.1     68.1     6.61     12.0      419      840      418      131      446      142     91.1
        (WY)     1999     1999     1999     1999     1998     1966     1997     1999     1964     1962     1966     1999
        MIN      .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000
        (WY)     1957     1957     1957     1957     1957     1957     1959     1959     1959     1959     1959     1958

        SUMMARY STATISTICS           FOR 1999 CALENDAR YEAR        FOR 2000 WATER YEAR           WATER YEARS 1957 - 2000

        ANNUAL TOTAL                       30809.8                     7026.49
        ANNUAL MEAN                           84.4                       19.2                     a 25.9
        HIGHEST ANNUAL MEAN                                                                        116              1997
        LOWEST ANNUAL MEAN                                                                          b .000          1959
        HIGHEST DAILY MEAN                  2150     May 14             233     Mar 26            5500       Apr 11 1969
        LOWEST DAILY MEAN                      3.3   Feb  7                .02  Sep 30              c .00    Oct  1 1956
        ANNUAL SEVEN-DAY MINIMUM               3.5   Feb  2                .04  Sep 24                .00    Oct  1 1956
        INSTANTANEOUS PEAK FLOW                                         238     Mar 26          d 5930       Apr 11 1969
        INSTANTANEOUS PEAK STAGE                                          5.99  Mar 26            f 16.19    Mar 29 1997
        ANNUAL RUNOFF (AC-FT)              61110                      13940                      18780
        10 PERCENT EXCEEDS                   191                         42                         36
        50 PERCENT EXCEEDS                    23                          7.5                         .06
        90 PERCENT EXCEEDS                     5.3                         .65                        .00

        a  Median of annual mean discharges, 16 ft3/s
        b  Also 1988 and 1990
        c  No flow for long periods in most years
        d  Gage height, 16.05 ft, backwater from ice
        e  Estimated
        f  Backwater from ice

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