RED RIVER OF THE NORTH BASIN

                                          05123400  WILLOW CREEK NEAR WILLOW CITY, ND>

LOCATION.--Lat 4835'20", long l0026'30", in NE1/4NW1/4 sec.23, T.159 N., R.76 W., McHenry County, Hydrologic Unit 09010004, on
   left bank 50 ft downstream from culverts on county road, 1.5 mi upstream from Snake Creek, and 7 mi west of Willow City.

DRAINAGE AREA.--1,160 mi2, approximately, of which about 430 mi2 is probably noncontributing.

                                                    WATER-DISCHARGE RECORDS

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

GAGE.--Water-stage recorder. Elevation of gage is 1,430 ft above sea level, from topographic map. Prior to Oct. 5, 1956,
   nonrecording gage at site 50 ft upstream at same datum.

REMARKS.--Records good except for periods of estimated daily discharges, which are poor.

                          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      14        6.0     22      e2.4      e.82      e20      142       66       72       46       45     8.9
          2      13        7.3     23      e2.3      e.81      e30      143       61       71       46       41    10
          3      12        7.7     21      e2.2      e.80      e64      144       57       69       45       40    10
          4      12        9.1    e20      e2.1      e.79      e90      138       52       71       53       37    15
          5      10       13      e19      e2.0      e.78     e125      129       48       71       78       68    16

          6      10       17       19      e1.8      e.78     e118      122       45       67       89       88   e15
          7      e9.2     17       19      e1.7      e.77     e105      117       43       62      141       75   e13
          8      e9.1     16       18      e1.5      e.77      e97      113       42       58      159       69   e12
          9      e9.1     16       16      e1.4      e.76       91      105       43       53      158       68   e10
         10      e9.1     17       13      e1.3      e.76      101      101       45       50      160       69    e8.9

         11      e9.1     20       11      e1.2      e.76      111       98       55       51      165       66    e7.6
         12      e9.2     23        9.4    e1.1      e.77      101       96       71       63      172       61    e6.8
         13      e9.2     33        8.5    e1.1      e.77       98       97      100       70      177       55    e6.1
         14      e9.2     33       e6.5    e1.0      e.77       77      100      142       89      182       51    e5.0
         15      e9.2     31       e5.5    e1.0      e.78       69      102      181      103     e187       43    e4.0

         16      e9.2     29       e4.5     e.98     e.79       63      106      218      113     e191       37    e3.5
         17      e9.3     26       e4.0     e.96     e.80       49      106      245      125      193       34    e3.0
         18      e9.3     24       e3.2     e.98     e.82       54      102      261      135      194       29    e2.5
         19       8.6     21       e2.7    e1.0      e.86      e64       96      272      140      192       24    e2.0
         20       8.5     18       e2.4     e.99     e.92      e82       90      255      141      187       20    e1.7

         21       8.1    e21       e2.5     e.96    e1.0       e97       86      219      135      180       18    e1.4
         22      18       21       e2.5     e.94    e1.1      e110       82      182      122      172       17    e1.1
         23      38       18       e2.5     e.92    e1.3      e130       79      150      106      160       17     e.80
         24      31       19       e2.6     e.91    e1.6      e150       78      124       95      144       16     e.75
         25      21       16       e2.6     e.90    e2.7      e165       76      107       86      125       15     e.70

         26      16      e16       e2.7     e.90    e4.9      e185       72       92       77      105       16     e.70
         27      12      e16       e2.7     e.88    e8.5      e200       69       86       69       89       16     e.65
         28       9.4    e17       e2.6     e.87   e12        e220       67       83       62       76       15     e.65
         29       6.6     19       e2.6     e.86   e16        e230       67       81       56       65       13     e.60
         30       6.6     19       e2.5     e.85      ---     e174       69       76       51       57       13     e.60
         31       6.6      ---     e2.5     e.83      ---      152      ---       74      ---       51       11      ---

        TOTAL   371.6    566.1    276.0    38.83    64.98     3422     2992     3576     2533     4039     1187   168.95
        MEAN     12.0     18.9     8.90     1.25     2.24      110     99.7      115     84.4      130     38.3     5.63
        MAX        38       33       23      2.4       16      230      144      272      141      194       88       16
        MIN       6.6      6.0      2.4      .83      .76       20       67       42       50       45       11      .60
        AC-FT     737     1120      547       77      129     6790     5930     7090     5020     8010     2350      335

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1956 - 2000, BY WATER YEAR (WY)

        MEAN     7.44     6.15     2.05      .27      .61     40.1      255      148     59.2     26.6     18.8     9.19
        MAX      71.8     43.7     24.8     4.39     16.4      342     1242     1424      769      255      146     75.5
        (WY)     1981     1995     1960     1960     1981     1995     1969     1999     1999     1999     1965     1980
        MIN      .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000
        (WY)     1957     1957     1957     1957     1958     1959     1977     1959     1959     1958     1957     1957

        SUMMARY STATISTICS           FOR 1999 CALENDAR YEAR        FOR 2000 WATER YEAR           WATER YEARS 1956 - 2000

        ANNUAL TOTAL                      117036.40                   19235.46
        ANNUAL MEAN                          321                         52.6                       47.8
        HIGHEST ANNUAL MEAN                                                                        323              1999
        LOWEST ANNUAL MEAN                                                                            .005          1990
        HIGHEST DAILY MEAN                  2700     Apr 11             272     May 19            5310       Apr 12 1969
        LOWEST DAILY MEAN                       .00  Jan  1                .60  Sep 29                .00    Sep 23 1956
        ANNUAL SEVEN-DAY MINIMUM                .00  Jan  1                .66  Sep 24                .00    Sep 23 1956
        INSTANTANEOUS PEAK FLOW                                         277     May 19            5900       Apr 12 1969
        INSTANTANEOUS PEAK STAGE                                          8.77  May 19              16.76    Apr 12 1969
        ANNUAL RUNOFF (AC-FT)             232100                      38150                      34660
        10 PERCENT EXCEEDS                  1180                        142                         97
        50 PERCENT EXCEEDS                    24                         21                           .00
        90 PERCENT EXCEEDS                      .00                        .92                        .00

        e  Estimated
        
        
                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1960-62, 1964-65, 1972 to current year.

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

                          DIS-     DIS-    BARO-   OXYGEN,             PH       PH       SPE-
                        CHARGE,  CHARGE,   METRIC    DIS-             WATER    WATER    CIFIC    SPE-
                           IN     INST.    PRES-    SOLVED            WHOLE    WHOLE     CON-    CIFIC
                         CUBIC    CUBIC     SURE    (PER-   OXYGEN,   FIELD     LAB     DUCT-    CON-    TEMPER-  TEMPER-
                          FEET     FEET     (MM      CENT     DIS-   (STAND-  (STAND-   ANCE     DUCT-    ATURE    ATURE
       DATE      TIME     PER      PER       OF     SATUR-   SOLVED    ARD      ARD      LAB     ANCE      AIR     WATER
                         SECOND   SECOND    HG)     ATION)   (MG/L)   UNITS)   UNITS)  (US/CM)  (US/CM)  (DEG C)  (DEG C)
                        (00060)  (00061)  (00025)  (00301)  (00300)  (00400)  (00403)  (90095)  (00095)  (00020)  (00010)

      OCT
       19...     1215      8.6      --      724      114     13.8      8.4      8.6     1520     1520       2.0     4.8
      NOV
       17...     1300      --      26        --       --       --       --       --       --     1310       7.5     2.0
      JAN
       12...     1540      --       1.1      --       --       --       --       --       --     2700     -17.0      .0
      MAR
       02...     1200      --      33        --       --       --       --       --       --     1640       8.0      .5
       30...     1505      --     174        --       --       --      8.3       --     1690     1700      11.0     7.2
      APR
       19...     0950    100        --      720       90      9.8      8.5      8.4     1400     1360       8.0     8.7
       20...     1300      --      92        --       --       --       --       --       --     1410      15.0    10.1
      MAY
       01...     1645     66.0      --      720      123     11.1      8.3      8.5     1370     1350      24.0    17.4
       18...     1750      --     260        --       --       --       --       --       --     2420      16.0    15.0
      JUN
       06...     1215     67.0      --      720      109      9.5      8.4      8.2     1430     1420      22.5    18.9
       26...     1340     77.0      --      720       72      6.0      8.5      8.5     1980     1990      21.0    21.2
       28...     1410      --      61        --       --       --       --       --       --     1840      22.0    22.0
      JUL
       25...     1200    125        --      710      108      8.4      8.2      8.3     1560     1560      22.0    24.3
      AUG
       07...     1630      --      72        --       --       --       --       --       --     1210      25.0    24.7
       22...     1130     17.0      --      720       59      5.2      8.2      8.4     1610     1700      23.5    18.5
       31...     1150      --      10.3      --       --       --      8.5      8.3     1660       --      18.0    17.6
      SEP
       19...     1055      3.4      --      710       66      6.2      8.5      8.5     1660     1660      14.0    14.3


                                                                                      ANC
                      HARD-             MAGNE-   POTAS-   SODIUM                    UNFLTRD   CHLO-    FLUO-
                      NESS    CALCIUM    SIUM,    SIUM,     AD-   SODIUM,           TIT 4.5   RIDE,    RIDE,   SULFATE
                      TOTAL    DIS-      DIS-     DIS-    SORP-    DIS-               LAB     DIS-      DIS-    DIS-
                      (MG/L    SOLVED   SOLVED   SOLVED    TION   SOLVED             (MG/L    SOLVED   SOLVED   SOLVED
             DATE      AS      (MG/L    (MG/L    (MG/L    RATIO    (MG/L    SODIUM    AS      (MG/L    (MG/L    (MG/L
                      CACO3)   AS CA)   AS MG)   AS K)             AS NA)  PERCENT   CACO3)   AS CL)   AS F)   AS SO4)
                     (00900)  (00915)  (00925)  (00935)  (00931)  (00930)  (00932)  (90410)  (00940)  (00950)  (00945)

         OCT
           19...       560     80        90      14         3       150      36       510     30         --      340
         NOV
           17...        --       --       --       --       --       --       --       --       --       --       --
         JAN
           12...        --       --       --       --       --       --       --       --       --       --       --
         MAR
           02...        --       --       --       --       --       --       --       --       --       --       --
           30...       480     71        73      17         4       210      48       312     34         .1      620
         APR
           19...       490     76        74      13         3       140      37       360     28         --      400
           20...        --       --       --       --       --       --       --       --       --       --       --
         MAY
           01...       520     81        76      14         2       130      35       390     26         --      360
           18...        --       --       --       --       --       --       --       --       --       --       --
         JUN
           06...       530     75        82      12         2       130      34       390      8.7       --      400
           26...       660     83       110      14         4       250      45       460     30         --      700
           28...        --       --       --       --       --       --       --       --       --       --       --
         JUL
           25...       480     68        76      11         4       180      44       420     52         --      400
         AUG
           07...        --       --       --       --       --       --       --       --       --       --       --
           22...       550     79        85      14         4       220      46       400     30         --      470
           31...       520     72        82      14         4       190      44       481     29         .2      430
         SEP
           19...       550     76        88      15         4       210      44       440     38         --      480

                                                            
                      NITRO-                                                                 SOLIDS,  SOLIDS,
                     GEN,AM-   NITRO-   NITRO-   NITRO-            PHOS-            SOLIDS,  RESIDUE  SUM OF    TRANS-
                     MONIA +    GEN,     GEN,     GEN,    NITRO-  PHORUS    PHOS-     DIS-   AT 180   CONSTI-    PAR-
                     ORGANIC  AMMONIA  NO2+NO3  ORGANIC    GEN,     DIS-   PHORUS    SOLVED   DEG. C  TUENTS,    ENCY
                      TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    SOLVED   TOTAL    (TONS     DIS-     DIS-   (SECCHI
             DATE     (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L     PER     SOLVED   SOLVED   DISK)
                      AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)     DAY)    (MG/L)   (MG/L)    (IN)
                     (00625)  (00610)  (00630)  (00605)  (00600)  (00666)  (00665)  (70302)  (70300)  (70301)  (00077)

                                                            
         OCT
           19...       1.7       .01      .02     1.7      1.7      .04       .05     23.4      --     1010     20.4
         NOV
           17...        --       --       --       --       --       --       --       --       --       --       --
         JAN
           12...        --       --       --       --       --       --       --       --       --       --       --
         MAR
           02...        --       --       --       --       --       --       --       --       --       --       --
           30...        --       --       --       --       --       --       --     592      1260     1210       --
         APR
           19...       1.4      <.01     <.02      --       --      .02       .07    261        --      947     15.0
           20...        --       --       --       --       --       --       --       --       --       --       --
         MAY
           01...       1.6      <.01     <.02      --       --      .07       .12    164        --      921     18.0
           18...        --       --       --       --       --       --       --       --       --       --       --
         JUN
           06...       1.7      <.01      .02      --      1.7      .08       .16    170        --      942     12.0
           26...       2.2      <.01      .02      --      2.2      .14       .20    304        --     1460     24.0
           28...        --       --       --       --       --       --       --       --       --       --       --
         JUL
           25...       2.1       .01      .03     2.1      2.1      .28       .33    351        --     1040     24.0
         AUG
           07...        --       --       --       --       --       --       --       --       --       --       --
           22...       2.0       .03      .02     2.0      2.0      .18       .25     52.2      --     1140     10.0
           31...        --       --       --       --       --       --       --      32.5    1170     1110       --
         SEP
           19...       2.0       .06      .02     1.9      2.0      .12       .18     10.7      --     1170     12.0


                      COLI-    STREP-  CHLOR-A  CHLOR-B
                      FORM,   TOCOCCI   PHYTO-   PHYTO-  ALUMI-                                        BERYL-
                      FECAL,   FECAL,   PLANK-   PLANK-    NUM,    ANTI-   ARSENIC           BARIUM,    LIUM   BORON,
                      0.7     KF AGAR    TON      TON     TOTAL    MONY,     DIS-   ARSENIC   TOTAL    TOTAL    TOTAL
                      UM-MF   (COLS.   CHROMO   CHROMO   RECOVER   TOTAL    SOLVED   TOTAL   RECOVER  RECOVER  RECOVER
             DATE    (COLS./    PER    FLUOROM  FLUOROM   -ABLE    (UG/L    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE
                     100 ML)  100 ML)   (UG/L)   (UG/L)   (UG/L)   AS SB)   AS AS)   AS AS)   (UG/L)   (UG/L)   (UG/L)
                     (31625)  (31673)  (70953)  (70954)  (01104)  (01097)  (01000)  (01002)  (01009)  (00998)  (00999)

         OCT
           19...        41      <15      38      <1.0      250      <1        --       4       110      <1       170
         NOV
           17...        --       --       --       --       --       --       --       --       --       --       --
         JAN
           12...        --       --       --       --       --       --       --       --       --       --       --
         MAR
           02...        --       --       --       --       --       --       --       --       --       --       --
           30...        --       --       --       --       --       --       2        --       --       --       --
         APR
           19...        K5      K10      <3.0    <1.0      540      <1        --       3        60      <1       190
           20...        --       --       --       --       --       --       --       --       --       --       --
         MAY
           01...        55       32      12      <1.0      400      <1        --       5        70      <1       210
           18...        --       --       --       --       --       --       --       --       --       --       --
         JUN
           06...       100       35       9.0      --      530      <1        --       5        58      <1       240
           26...       110       85     <10      <3.2      490      <1        --       6        84      <1       430
           28...        --       --       --       --       --       --       --       --       --       --       --
         JUL
           25...       136       41      17       2.0      500      <1        --       6        87      <1       290
         AUG
           07...        --       --       --       --       --       --       --       --       --       --       --
           22...       300     K110      44      <3.0      880      <1        --       8        88      <1       280
           31...        --       --       --       --       --       --       6        --       --       --       --
         SEP
           19...       960      120      21      <4.0     1200      <1        --       8       130      <1       250


                               CHRO-                      IRON,                               MANGA-  MANGAN-
                     CADMIUM   MIUM,   COPPER,   IRON,    TOTAL    LEAD,    LEAD,   LITHIUM   NESE,     ESE    MERCURY
                      TOTAL    TOTAL    TOTAL     DIS-    RECOV-    DIS-    TOTAL     DIS-     DIS-    TOTAL     DIS-
                     RECOVER  RECOVER  RECOVER   SOLVED   ERABLE   SOLVED  RECOVER   SOLVED   SOLVED  RECOVER   SOLVED
             DATE     -ABLE    -ABLE    -ABLE    (UG/L    (UG/L    (UG/L    -ABLE    (UG/L    (UG/L   - ABLE    (UG/L
                      (UG/L)   (UG/L)   (UG/L)   AS FE)   AS FE)   AS PB)   (UG/L)   AS LI)   AS MN)   (UG/L)   AS HG)
                     (01113)  (01118)  (01119)  (01046)  (01045)  (01049)  (01114)  (01130)  (01056)  (01123)  (71890)
                                                            
         OCT
           19...       <1       <1        2        --      360       --      <1        --       --      280       --
         NOV
           17...        --       --       --       --       --       --       --       --       --       --       --
         JAN
           12...        --       --       --       --       --       --       --       --       --       --       --
         MAR
           02...        --       --       --       --       --       --       --       --       --       --       --
           30...        --       --       --      80        --      <1        --      140     110        --      <.1
         APR
           19...       <1       <1        2        --      767       --      <1        --       --      150       --
           20...        --       --       --       --       --       --       --       --       --       --       --
         MAY
           01...       <1       <1        1        --      634       --      <1        --       --      242       --
           18...        --       --       --       --       --       --       --       --       --       --       --
         JUN
           06...       <1       <1        1        --      726       --      <1        --       --      117       --
           26...       <1       <1        5        --      654       --      <1        --       --      139       --
           28...        --       --       --       --       --       --       --       --       --       --       --
         JUL
           25...       <1        1        2        --      715       --       1        --       --      177       --
         AUG
           07...        --       --       --       --       --       --       --       --       --       --       --
           22...       <1        2        3        --     1340       --       1        --       --      334       --
           31...        --       --       --      40        --       1        --      170      20.0      --      <.1
         SEP
           19...       <1        2        4        --     1550       --       3        --       --      391       --


                                                                            THAL-                      SEDI-     SED.
                      MOLYB-            SELE-                      STRON-   LIUM,                      MENT,     SUSP.
                      DENUM,  NICKEL,   NIUM,    SELE-   SILVER,    TIUM,   TOTAL    ZINC,    SEDI-     DIS-    SIEVE
                       DIS-    TOTAL     DIS-    NIUM,    TOTAL     DIS-    RECOV-   TOTAL    MENT,   CHARGE,    DIAM.
                      SOLVED  RECOVER   SOLVED   TOTAL   RECOVER   SOLVED   ERABLE  RECOVER   SUS-      SUS-   % FINER
             DATE     (UG/L    -ABLE    (UG/L    (UG/L    -ABLE    (UG/L    (UG/L    -ABLE    PENDED   PENDED    THAN
                      AS MO)   (UG/L)   AS SE)   AS SE)   (UG/L)   AS SR)   AS TL)   (UG/L)   (MG/L)  (T/DAY)  .062 MM
                     (01060)  (01074)  (01145)  (01147)  (01079)  (01080)  (01128)  (01094)  (80154)  (80155)  (70331)

         OCT
           19...        --       7        --       3       <1        --      <1       13       75       1.7      78
         NOV
           17...        --       --       --       --       --       --       --       --       --       --       --
         JAN
           12...        --       --       --       --       --       --       --       --       --       --       --
         MAR
           02...        --       --       --       --       --       --       --       --       --       --       --
           30...        2        --     <1.0       --       --      420       --       --       --       --       --
         APR
           19...        --       5        --       2       <5        --      <1        5       72      20        99
           20...        --       --       --       --       --       --       --       --       --       --       --
         MAY
           01...        --       8        --       2       <1        --      <1        6       53       9.4      95
           18...        --       --       --       --       --       --       --       --       --       --       --
         JUN
           06...        --       6        --       2       <1        --      <1       15       56      10        99
           26...        --       6        --       2       <1        --      <1       14       89      19        98
           28...        --       --       --       --       --       --       --       --       --       --       --
         JUL
           25...        --       5        --       1       <1        --      <1       15       33      11         --
         AUG
           07...        --       --       --       --       --       --       --       --       --       --       --
           22...        --       7        --       2       <1        --      <1        7       41       1.9       --
           31...        4        --     <1.0       --       --      500       --       --       --       --       --
         SEP
           19...        --       8        --       2       <1        --      <1       16       96        .88     73

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