RED RIVER OF THE NORTH BASIN

                                              05090000  PARK RIVER AT GRAFTON, ND

LOCATION.--Lat 48o25'29", long 97o24'42", in NE1/4 sec.13, T.157 N., R.53 W., Walsh County, Hydrologic Unit 09020310, on right
   bank just upstream of U.S. Highway 81 bridge in Grafton, and 3.5 mi downstream from South Branch Park River.

DRAINAGE AREA.--695 mi2, approximately.

                                                    WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April 1931 to current year. Monthly discharge only for some periods, published in WSP 1308.

REVISED RECORDS.--WSP 955: 1941. WSP 1438: 1932, 1933(M), 1936-37(M), 1939(M), 1944. WSP 1728: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 811.00 ft above sea level. Prior to Oct. 1, 1984, gage located on right bank 30 ft
   upstream of Wakeman Avenue bridge. Datum of gage was 807.39 ft. Prior to Sept. 30, 1940, nonrecording gage at site 30 ft
   downstream at same datum. Oct. 1, 1940, to Sept. 17, 1946, nonrecording gage at site 2 mi downstream above masonry dam at
   same datum. Sept. 18, 1946, to July 25, 1952, nonrecording gage at site 30 ft downstream at same datum.

REMARKS.--Records good except 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       .19      .90     18       e2.3     e2.9     e2.8     1070      101      132       47     10       5.4
           2       .00      .71     11       e2.3     e2.9     e2.8      855       83      119       44      9.3     5.0
           3       .00      .58     10       e2.3     e2.9     e2.8      646       76       86       53      8.5     4.4
           4       .00      .56     10       e2.2     e2.9     e2.7      427       70       90       53      7.9     5.1
           5       .52      .52      7.9     e2.2     e2.9     e2.7      371       77       86       47      8.3     5.7

           6      1.1       .75      6.4     e2.2     e2.9     e2.7      354       82       84       40      7.9     5.8
           7      1.3      1.2      e6.1     e2.2     e2.9     e2.7      423      111       89       33      7.1     5.7
           8       .96     1.4      e5.8     e2.2     e2.9     e2.8     1150      126       82       28      6.7     4.5
           9       .94     1.7      e5.6     e2.2     e2.9     e2.8     1950      133       95       28      7.6     4.5
          10       .94     3.4      e5.4     e2.3     e2.9     e2.8     2180      178      119       26      7.9     4.1

          11       .81     2.2      e5.3     e2.3     e2.9     e2.9     1650      337      124       24      9.9     3.6
          12       .48     1.5      e5.6     e2.3     e2.9     e2.9     1350      595      143       24     21       3.4
          13       .48     1.8      e6.0     e2.4     e2.8     e3.0      999      564      141       23     28       3.3
          14       .48     2.2      e6.6     e2.4     e2.8     e3.1      689      549      122       29     28       2.6
          15       .48     2.1      e7.6     e2.4     e2.7     e3.2      557      509      108       26     28       2.0

          16       .38     2.7      e6.9     e2.6     e2.6     e3.4      473      493       96       24     32       1.9
          17       .03     3.0      e5.8     e2.6     e2.5     e3.8      405      460       82       24     29       1.9
          18       .07     3.7      e5.0     e2.6     e2.5     e4.6      349      399       72       23     21       1.9
          19       .58     3.1      e4.0     e2.7     e2.4     e6.2      307      339       63       23     15       1.9
          20       .85     2.8      e3.6     e2.8     e2.4     e8.0      282      276       58       23     14       1.9

          21      1.3      3.5      e3.2     e2.8     e2.4    e11        262      224       58       22     13       1.5
          22      1.4      3.8      e2.5     e2.8     e2.4    e20        246      193       54       20     14       1.4
          23      1.3      4.2      e2.4     e2.8     e2.5   e130        234      176       59       17     13       1.4
          24      1.2      4.6      e2.3     e2.9     e2.6   e190        196      167       50       17     13       1.4
          25      1.0     10        e2.2     e2.9     e2.7   e260        170      166       37       15     10       1.4

          26       .96    17        e2.1     e2.9     e2.7   e350        156      150       56       13      8.9     1.4
          27       .88    18        e2.2     e2.9     e2.8   e400        144      137       55       12      8.8     1.1
          28       .92    18        e2.2     e2.9     e2.8   e470        134      121       43       12      6.6      .96
          29       .93    18        e2.2     e2.8      ---   e600        124      103       47       12      5.5      .96
          30      1.4     19        e2.3     e2.8      ---  e1100        120       93       47       11      5.4      .96
          31       .98      ---     e2.3     e2.9      ---   1240        ---       90      ---       11      5.5      ---

         TOTAL   22.86   152.92    168.5     78.9     76.4   4839.7    18273     7178     2497      804    410.8    87.08
         MEAN      .74     5.10     5.44     2.55     2.73      156      609      232     83.2     25.9     13.3     2.90
         MAX       1.4       19       18      2.9      2.9     1240     2180      595      143       53       32      5.8
         MIN       .00      .52      2.1      2.2      2.4      2.7      120       70       37       11      5.4      .96
         AC-FT      45      303      334      156      152     9600    36240    14240     4950     1590      815      173

         STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 1999, BY WATER YEAR (WY)

         MEAN     5.18     3.56     2.41     1.38     2.58     79.3      422      119     46.1     34.1     13.7     7.19
         MAX      69.9     31.3     17.4     13.9     45.7      654     2051     2071      576      441      569      151
         (WY)     1983     1981     1983     1983     1981     1995     1950     1950     1964     1997     1993     1957
         MIN      .000     .000     .000     .000     .000     .000     .000     2.05     .000     .000     .000     .000
         (WY)     1934     1934     1933     1932     1933     1936     1991     1939     1961     1990     1932     1932

         SUMMARY STATISTICS           FOR 1998 CALENDAR YEAR        FOR 1999 WATER YEAR           WATER YEARS 1931 - 1999

         ANNUAL TOTAL                       47843.23                   34589.16
         ANNUAL MEAN                          131                         94.8                       61.5
         HIGHEST ANNUAL MEAN                                                                        353              1950
         LOWEST ANNUAL MEAN                                                                           1.38           1990
         HIGHEST DAILY MEAN                  3190     Mar 30            2180     Apr 10           11700       Apr 19 1950
         LOWEST DAILY MEAN                       .00  Oct  2                .00  Oct  2                .00    Aug 10 1931
         ANNUAL SEVEN-DAY MINIMUM                .23  Sep 28                .34  Oct 12                .00    Aug 21 1931
         INSTANTANEOUS PEAK FLOW                                        2180     Apr 10         a 12600       Apr 19 1950
         INSTANTANEOUS PEAK STAGE                                         11.74  Apr 10            b 20.13    Apr 19 1950
         ANNUAL RUNOFF (AC-FT)              94900                      68610                      44540
         10 PERCENT EXCEEDS                   269                        268                         79
         50 PERCENT EXCEEDS                     6.6                        5.8                        1.8
         90 PERCENT EXCEEDS                      .96                       1.2                         .00

         a  From rating curve extended above 9,000 ft3/s
         b  Site and datum then in use
         e  Estimated

                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water year 1969 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
            22...       1320      1.4      --       --       --     1450     15.0      7.5       --       --       --
          FEB
            01...       1620      2.9      --       --       --     2050       --      1.0       --       --       --
          APR
            03...       0935    646       7.8       --      477      475       --      2.5      160       41      15
          MAY
            20...       0920    273        --       --       --     1080     19.0     17.0       --       --       --
          JUN
            25...       0925     36        --       --       --     1050     24.0     22.0       --       --       --
          AUG
            16...       1600     33       8.2      8.0     1480     1500     23.0     20.0      540      120      59


                                                                 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
                 22...        --       --       --       --       --       --       --       --       --       --
               FEB
                 01...        --       --       --       --       --       --       --       --       --       --
               APR
                 03...       7.1       1       27        30      105       15       .20     110     560       321
               MAY
                 20...        --       --       --       --       --       --       --       --       --       --
               JUN
                 25...        --       --       --       --       --       --       --       --       --       --
               AUG
                 16...      12         2       32       120      280      100       .40     420      93.0    1050


                           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
                 22...        --       --       --       --       --       --       --       --       --       --
               FEB
                 01...        --       --       --       --       --       --       --       --       --       --
               APR
                 03...       282       2       90      <1.0      20       130      <.1      1.0       1       210
               MAY
                 20...        --       --       --       --       --       --       --       --       --       --
               JUN
                 25...        --       --       --       --       --       --       --       --       --       --
               AUG
                 16...      1000       4       70       1.0      70       590      <.1      7.0       2       590

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