MISSOURI RIVER MAIN STEM

                                            06341000  MISSOURI RIVER AT WASHBURN, ND

LOCATION.--Lat 4717'20", long 10102'15", in SE1/4SW1/4 sec.14, T.144 N., R.82 W., McLean County, Hydrologic Unit 10130101, on
   left bank near municipal waterplant in Washburn and at mile 1,355.

DRAINAGE AREA.--184,000 mi2, approximately.

                                                      GAGE-HEIGHT RECORDS

PERIOD OF RECORD.--August 1960 to current year.

GAGE.--Water-stage recorder. Datum of gage is 1,640.00 ft above sea level. Prior to Sept. 30, 1964, at datum 40 ft lower.

REMARKS.--Stage regulated by releases from Garrison Dam (station 06338490) 35 mi upstream.

EXTREMES FOR PERIOD OF RECORD.--Maximum daily gage height recorded, 22.76 ft, Jan. 11, 1964; minimum daily recorded, 9.30 ft,
   Jan. 9, 2000.

                                 GAGE HEIGHT, FEET, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
                                                       DAILY MEAN VALUES

        DAY       OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP

          1     11.70    10.55    10.90     9.83    12.85    12.09    10.11    10.44    11.94    12.17    11.75    11.46
          2     12.10    10.38    10.92     9.86    12.28    12.11    10.24    10.45    11.87    12.08    11.69    11.64
          3     11.52    10.34    11.11     9.86    11.53    11.86    10.13    10.41    11.96    12.15    11.65    11.27
          4     11.39    10.56    10.42     9.80    11.42    11.78    10.40    10.47    12.28    12.06    11.64    11.47
          5     10.75    10.21    10.58     9.86    11.18    11.63    10.72    10.39    12.04    11.74    11.65    11.34

          6     10.58    10.43    10.38     9.66    11.11    11.61    10.65    10.51    12.00    11.66    11.60    11.27
          7     10.53    10.29    10.44     9.59    11.09    11.12    10.77    10.50    12.08    11.60    11.71    11.17
          8     10.54    10.48    10.70     9.54    11.10    10.80    10.79    10.48    12.00    11.71    11.66    11.22
          9     10.22    10.37    10.59     9.30    11.18    10.55    10.84    10.42    11.96    11.60    11.65    11.20
         10     10.53    10.40    10.61     9.72   e11.20    10.45    10.86    10.51    11.97    11.65    11.61    11.17

         11     10.35    10.68    10.59     9.61   e11.28    10.34    11.05    10.56    11.78    11.64    11.65    10.39
         12     10.43    10.39    10.52    10.26    11.26    10.50    11.00    10.49    11.79    11.64    11.66     9.94
         13     10.69    10.50    10.58    11.33    11.11    10.64    10.81    10.57    11.86    11.59    11.64     9.73
         14     10.34    10.40    10.44    11.10    11.19    10.59    11.02    11.14    12.04    11.63    11.72    10.06
         15     10.45    10.34    10.53     9.99    11.32    10.47    10.81    11.76    11.99    11.74    11.67    10.35

         16     11.03    10.43    10.58    10.06    11.22    10.37    10.82    11.96    12.01    11.63    11.70    10.23
         17     10.55    10.67    10.61    11.51    11.29    10.46    10.87    12.05    11.92    11.64    11.67    10.31
         18     10.37    10.43    10.71    11.80    11.25    10.53    11.01    12.05    11.94    11.67    11.64    10.38
         19     10.46    10.45    11.18    11.60    11.33    10.46    10.87    12.04    12.03    11.66    11.73    10.48
         20     10.66    10.45    11.49    12.71    11.24    10.39    10.79    11.93    12.00    11.66    11.68    10.05

         21     10.38    10.42      ---    13.07    11.47    10.21    11.09    11.99    11.78    11.71    11.69    10.44
         22     10.57    10.47      ---    13.18    11.36    10.25    10.81    12.01    11.90    11.69    11.61    10.09
         23     10.62    10.36      ---    15.17    11.52    10.27    10.83    12.13    11.80    11.73    11.62    10.18
         24     10.68    10.37      ---    16.94    11.42    10.37    10.80    11.93    11.79    11.65    11.50     9.51
         25     10.41    10.33      ---    16.71    11.52    10.14    10.83    11.83    11.77    11.65    11.46     9.54

         26     10.62    10.37      ---    16.57    11.69    10.23    10.83    11.93    11.71    11.72    11.61     9.55
         27     10.72    10.41      ---    16.50    11.93    10.26    10.83    12.12    11.75    11.74    11.69     9.65
         28     10.65    10.46      ---    15.70    12.14    10.34    10.71    11.99    11.75    11.47    11.67     9.72
         29     10.60    10.55     9.92    14.57    11.99    10.19    10.42    12.03    11.96    11.71    11.62    10.07
         30     10.64    10.74     9.89    13.60      ---    10.12    10.39    12.15    12.02    11.72    11.57    10.36
         31     10.17      ---     9.92    13.03      ---    10.15      ---    11.97      ---    11.75    11.64      ---

        MEAN    10.69    10.44      ---    12.00    11.46    10.69    10.74    11.33    11.92    11.72    11.65    10.47
        MAX     12.10    10.74      ---    16.94    12.85    12.11    11.09    12.15    12.28    12.17    11.75    11.64
        MIN     10.17    10.21      ---     9.30    11.09    10.12    10.11    10.39    11.71    11.47    11.46     9.51

        e  Estimated

                                              Miscellaneous discharge measurements

                Date          Discharge        Gage Height               Date       Discharge         Gage Height
              Apr. 10          13,900            10.58                 July  18      22,500             11.78
              Apr. 25          17,700            10.60                 Aug.  15      24,600             11.80
              May  16          22,600            11.78                 Sept. 14      15,500             10.00
              July  5          22,300            11.68
              
              
                                                     WATER-QUALITY RECORDS

PERIOD OF RECORD.--April 2000 to September 2000.

                                 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)

         APR
           10...       1235    14400     714      110     13.8      8.0      8.3      620      640       --      3.2
           25...       1325    17700     715      115     13.5      8.1       --      628      650       --      5.6
         MAY
           16...       1220    22600      --       --     12.5      8.0      8.3      619      639     20.5      8.3
         JUL
           05...       1130    22300      --       --       --      7.7       --      610      600     20.0     20.0
           18...       1120    22500      --       --      9.8      8.0      8.2      607      634       --     13.9
         AUG
           15...       1100    24600     725       85      8.2      7.8       --      635      600     21.0     14.5
         SEP
           14...       1115    15450      --       --      9.3      8.1      8.3      616      626       --     16.4


                                                                                      ANC                       NITRO-
                      HARD-             MAGNE-   POTAS-   SODIUM                    UNFLTRD   CHLO-            GEN,AM-
                      NESS    CALCIUM    SIUM,    SIUM,     AD-   SODIUM,           TIT 4.5   RIDE,   SULFATE  MONIA +
                      TOTAL    DIS-      DIS-     DIS-    SORP-    DIS-               LAB     DIS-     DIS-    ORGANIC
                      (MG/L    SOLVED   SOLVED   SOLVED    TION   SOLVED             (MG/L    SOLVED   SOLVED   DIS.
             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 SO4)   AS N)
                     (00900)  (00915)  (00925)  (00935)  (00931)  (00930)  (00932)  (90410)  (00940)  (00945)  (00623)

         APR
           10...       200      47       19        4        2       54       37       150      8.2      170      .12
           25...       200      47       19        2        2       56       38       150      8.4      170      .24
         MAY
           16...       200      48       20        4        2       55       37       150      8.1      170     <.08
         JUL
           05...       200      47       19        3        2       51       36       150      8.4      160      .15
           18...       190      46       18        3        2       49       36       150      8.2      160      .25
         AUG
           15...       200      47       19        3        2       50       35       150      8.4      160      .16
         SEP
           14...       200      48       19        4        2       52       36       160      8.9      160      .23


                      NITRO-            NITRO-   NITRO-
                     GEN,AM-   NITRO-    GEN,     GEN,    NITRO-   NITRO-            NITRO-   PHOS-            SOLIDS,
                     MONIA +    GEN,   AMMONIA  NO2+NO3    GEN,     GEN,    NITRO-    GEN    PHORUS    PHOS-     DIS-
                     ORGANIC  AMMONIA    DIS-     DIS-   NO2+NO3  ORGANIC    GEN,    DIS-      DIS-   PHORUS    SOLVED
                      TOTAL    TOTAL    SOLVED   SOLVED   TOTAL    TOTAL    TOTAL   SOLVED    SOLVED   TOTAL    (TONS
             DATE     (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L     PER
                      AS N)    AS N)    AS N)    AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)     DAY)
                     (00625)  (00610)  (00608)  (00631)  (00630)  (00605)  (00600)  (00602)  (00666)  (00665)  (70302)

         APR
           10...       .18     <.01       --      .07      .06       --      .24       .19     .02      .02     15300
           25...       .26     <.01      <.01     .06      .07       --      .33       .30    <.01     <.02     18800
         MAY
           16...       .09     <.01      <.01     .12      .06       --      .15       --     <.01      .02     24100
         JUL
           05...       .19     <.01       --      .06      .05       --      .24       .21    <.01      .02     22800
           18...       .21      .09      <.01     .02      .10       .12     .31       .27    <.01      .02     22700
         AUG
           15...       .21     <.01      <.01     .06      .06       --      .27       .22    <.01     <.02     25100
         SEP
           14...       .20      .01      <.01     .05      .05       .19     .25       .28    <.01     <.02     16200


                     SOLIDS,
                     SUM OF   ALUMI-                               BERYL-                     CHRO-             IRON,
                     CONSTI-    NUM,    ANTI-            BARIUM,    LIUM   BORON,   CADMIUM   MIUM,   COPPER,   TOTAL
                     TUENTS,   TOTAL    MONY,   ARSENIC   TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    RECOV-
                       DIS-   RECOVER   TOTAL    TOTAL   RECOVER  RECOVER  RECOVER  RECOVER  RECOVER  RECOVER   ERABLE
             DATE     SOLVED   -ABLE    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE    -ABLE    -ABLE    -ABLE    (UG/L
                      (MG/L)   (UG/L)   AS SB)   AS AS)   (UG/L)   (UG/L)   (UG/L)   (UG/L)   (UG/L)   (UG/L)   AS FE)
                     (70301)  (01104)  (01097)  (01002)  (01009)  (00998)  (00999)  (01113)  (01118)  (01119)  (01045)

         APR
           10...       392      120      <1        2       49       <1       170      <1       <1        1        98
           25...       393       97      <1        2       52       <1       240      <1       <1        1       120
         MAY
           16...       396      140      <1        3       51        1       170       1       <1        1       220
         JUL
           05...       379      180      <1        2       58       <1       140      <1        1        2       280
           18...       374      120      <1        2       52       <1       180      <1       <1        1       200
         AUG
           15...       378      260      <1        2       55       <1       140      <1       <1        4       300
         SEP
           14...       388      120      <1        2       57       <1       140      <1       <1        4       150


                                                                            THAL-                      SEDI-     SED.
                              MANGAN-   MOLYB-                              LIUM,                      MENT,     SUSP.
                      LEAD,     ESE     DENUM   NICKEL,   SELE-   SILVER,   TOTAL    ZINC,    SEDI-     DIS-    SIEVE
                      TOTAL    TOTAL    TOTAL    TOTAL    NIUM,    TOTAL    RECOV-   TOTAL    MENT,   CHARGE,    DIAM.
                     RECOVER  RECOVER  RECOVER  RECOVER   TOTAL   RECOVER   ERABLE  RECOVER   SUS-      SUS-   % FINER
             DATE     -ABLE   - ABLE    -ABLE    -ABLE    (UG/L    -ABLE    (UG/L    -ABLE    PENDED   PENDED    THAN
                      (UG/L)   (UG/L)   (UG/L)   (UG/L)   AS SE)   (UG/L)   AS TL)   (UG/L)   (MG/L)  (T/DAY)  .062 MM
                     (01114)  (01123)  (01129)  (01074)  (01147)  (01079)  (01128)  (01094)  (80154)  (80155)  (70331)

         APR
           10...       <1       <10      <1        3       <1       <3       <1        3       89      3460      92
           25...       <1       <10      <1        3        1       <1       <1        7        5       239      56
         MAY
           16...       <1       <10      <1        3        6       <1       <1       10        --       --       --
         JUL
           05...       <1       <10      <1        3        1       <1       <1        2        8       482      56
           18...       <1       <10      <1        2       <1       <1       <1       16       31      1880      18
         AUG
           15...       <1       <10      <1        3       <1       <1       <1       12       17      1130      36
         SEP
           14...        1       <10      <1        2        1       <1       <1       20       12       501      57

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