RED RIVER OF THE NORTH BASIN

                                        05064500  RED RIVER OF THE NORTH AT HALSTAD, MN

LOCATION.--Lat 4721'10", long 9650'36", sec.25, T.145 N., R.49 W., Traill County, Hydrologic Unit 09020107, on center pier on
   upstream side of highway bridge, 0.5 mi west of Halstad, MN, 2.5 mi downstream from Wild Rice River, and at mile 375.2.

DRAINAGE AREA.--21,800 mi2, approximately, including 3,800 mi2 in closed basins.


                                                    WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--April 1936 to June 1937 (no winter records), April 1942 to September 1960 (spring and summer months only),
   May 1961 to current year.

REVISED RECORDS.--WSP 1388: 1936, 1950. WSP 1728: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 826.65 ft above National Geodetic Vertical Datum of 1929. Prior to July 17, 1961,
   nonrecording gage at same site and datum.

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

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in 1897 reached a stage of about 38.5 ft.

                          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      2120     1520     1290    e1080     e810    e2900     4820     3340     2220    21400     2980    e1500
          2      2070     1520     1310    e1060     e800    e4000     4390     3250     2180    17900     2880    e1700
          3      2010     1520     1410    e1050     e800    e5000     3990     3180     2170    13900     2750    e2200
          4      1960     1520     1470    e1030     e790    e6000     3760     3150     2140    10200     2590    e3500
          5      1870     1510    e1400    e1020     e780    e7000     3670     3080     2230     8200     2420    e4600

          6      1800     1490    e1200    e1000     e770    e7300     3450     3020     2330     7640     2270     4520
          7      1750     1460    e1050    e1000     e760    e7500     3350     2960     2410     7370     2110     3900
          8      1750     1450    e1050     e990     e750    e7500     3320     2900     2520     7860     1970     3260
          9      1800     1430    e1200     e980     e750    e7500     3220     2950     2520     8650     1850     2690
         10      1790     1430    e1400     e970     e740     7580     3050     2950     2450     8660     1750     2260

         11      1800     1430    e2050     e960     e730     7500     2930     2950     2370     8060     1660     2000
         12      1810     1450    e2100     e950     e730     7350     2900     2990     2270     7230     1590     1820
         13      1820     1450    e2100     e930     e730     6730     2860     3030     2160     6510     1530     1670
         14      1800     1450    e2000     e920     e730     5730     2840     3060     2140     5920     1480     1550
         15      1800     1460    e1350     e910     e730     4950     2790     3090     2200     5500     1460     1500

         16      1830     1470    e1200     e900     e730     4350     2780     3140     2390     5230     1510     1500
         17      1850     1470    e1100     e900     e730     3830     2810     3200     2890     5000     1600     1520
         18      1820     1470    e1000     e890     e730     3380     2860     3150     3520     4620     1730     1510
         19      1810     1470     e920     e890     e730     3060     2890     3070     3950     4200     1620     1500
         20      1800     1460     e880     e880     e730     3000     2870     2990     8180     3900     1570     1460

         21      1780     1460     e870     e880     e750     3360     2880     2880    17400     3710     1520     1410
         22      1780     1440    e1000     e870     e770     3840     2970     2760    22600     3620     1500     1430
         23      1780     1420    e1170     e860     e800     4430     3390     2680    25800     3580     1480     1560
         24      1740     1400    e1200     e850     e900     5720     3750     2610    27900     3480     1480     1870
         25      1690     1370    e1200     e850    e1050     8340     3940     2540    28800     3300     1400     1890

         26      1670     1320    e1170     e850    e1400     9980     3970     2480    29100     3120     1380     1870
         27      1630     1300    e1150     e850    e2000     9700     3900     2400    28900     3050    e1300     1790
         28      1610     1300    e1150     e840    e2400     8380     3740     2320    28000     3030    e1100     1710
         29      1580     1260    e1130     e830    e2900     7010     3580     2270    26400     3040     1100     1680
         30      1560     1340    e1130     e820      ---     6060     3440     2180    24200     3060     1210     1590
         31      1540      ---    e1100     e810      ---     5370      ---     2240      ---     3040    e1300      ---

        TOTAL   55420    43040    39750    28620    28020   184350   101110    88810   314340   203980    54090    62960
        MEAN     1788     1435     1282      923      966     5947     3370     2865    10480     6580     1745     2099
        MAX      2120     1520     2100     1080     2900     9980     4820     3340    29100    21400     2980     4600
        MIN      1540     1260      870      810      730     2900     2780     2180     2140     3030     1100     1410
        AC-FT  109900    85370    78840    56770    55580   365700   200600   176200   623500   404600   107300   124900

        STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 2000, BY WATER YEAR (WY)

        MEAN      863      765      608      501      548     2673     7765     3899     2953     2901     1190      863
        MAX      2875     1843     1486     1023     1952     9444    38460    15570    10480    20060    11700     4705
        (WY)     1995     1995     1999     1987     1998     1995     1997     1997     2000     1975     1993     1999
        MIN      61.5     92.3     51.2     32.1     45.9      249      705      449      242      153     59.5     38.4
        (WY)     1977     1977     1977     1977     1977     1962     1981     1977     1977     1988     1977     1976

        SUMMARY STATISTICS           FOR 1999 CALENDAR YEAR        FOR 2000 WATER YEAR           WATER YEARS 1961 - 2000

        ANNUAL TOTAL                     1422650                    1204490
        ANNUAL MEAN                         3898                       3291                       2143
        HIGHEST ANNUAL MEAN                                                                       6028              1997
        LOWEST ANNUAL MEAN                                                                         214              1977
        HIGHEST DAILY MEAN                 17900     Mar 29           29100     Jun 26           69900       Apr 19 1997
        LOWEST DAILY MEAN                    740     Feb 10             730     Feb 11              10       Sep  2 1976
        ANNUAL SEVEN-DAY MINIMUM             743     Feb  9             730     Feb 11              17       Aug 28 1976
        INSTANTANEOUS PEAK FLOW                                       29100     Jun 26           71500       Apr 19 1997
        INSTANTANEOUS PEAK STAGE                                         31.27  Jun 26              40.74    Apr 19 1997
        INSTANTANEOUS LOW FLOW                                                                       5.4     Oct  8 1936
        ANNUAL RUNOFF (AC-FT)            2822000                    2389000                    1552000
        10 PERCENT EXCEEDS                  9380                       6810                       4770
        50 PERCENT EXCEEDS                  2500                       1870                        850
        90 PERCENT EXCEEDS                   880                        880                        225

        e  Estimated


                                                     WATER-QUALITY RECORDS


PERIOD OF RECORD.--Water years 1961-67, 1972 to current year.

PERIOD OF DAILY RECORD.--

   WATER TEMPERATURE: October 1997 to current year.

   SPECIFIC CONDUCTANCE: October 1997 to current year.

INSTRUMENTATION.--Water-quality sensors since October 1997.

REMARKS.--Records good. Interruptions in daily record are due to recorder malfunctions and sensor probe destruction.

EXTREMES FOR PERIOD OF DAILY RECORD.--

   WATER TEMPERATURE: Maximum recorded, 28.7C, July 24, 1999; minimum recorded, 0.1C, Nov. 25, 1999.

   SPECIFIC CONDUCTANCE: Maximum recorded, 1,120 microsiemens, Dec. 31, 1998; minimum recorded, 235 microsiemens, 
     June 21, 2000.

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

                                DIS-     DIS-     PH       PH       SPE-
                              CHARGE,  CHARGE,   WATER    WATER    CIFIC    SPE-                       HARD-
                                 IN     INST.    WHOLE    WHOLE     CON-    CIFIC                      NESS    CALCIUM
                               CUBIC    CUBIC    FIELD     LAB     DUCT-    CON-    TEMPER-  TEMPER-   TOTAL    DIS-
                                FEET     FEET   (STAND-  (STAND-   ANCE     DUCT-    ATURE    ATURE    (MG/L    SOLVED
             DATE      TIME     PER      PER      ARD      ARD      LAB     ANCE      AIR     WATER     AS      (MG/L
                               SECOND   SECOND   UNITS)   UNITS)  (US/CM)  (US/CM)  (DEG C)  (DEG C)   CACO3)   AS CA)
                              (00060)  (00061)  (00400)  (00403)  (90095)  (00095)  (00020)  (00010)  (00900)  (00915)

         OCT
           05...       0900     1870      --       --       --       --      802       --      8.5       --       --
           29...       1000     1580      --       --       --       --      771       --      6.3       --       --
         NOV
           17...       1000     1470      --       --       --       --      704       --      2.9       --       --
         DEC
           03...       1540     1410      --       --       --       --       --       --      2.0       --       --
         FEB
           10...       1300      --      738       --       --       --      822     -9.0       .0       --       --
         APR
           04...       1800     6000      --       --       --       --      858       --      6.4       --       --
           25...       1110      --     4070      8.5       --      877      870     20.5     14.0      390     77.0
         MAY
           24...       1445     2610      --       --       --       --      912       --     16.3       --       --
         JUN
           07...       1050      --     2310       --       --       --       --     28.0     20.5       --       --
           23...       1120    25800      --       --       --       --      262       --     18.1       --       --
         JUL
           19...       1345     4200      --       --       --       --      806       --     23.8       --       --
           26...       1300      --     3010       --       --       --      779       --     25.0       --       --
         AUG
           24...       1030      --     1480      8.3      8.0      708      744     18.0     21.5      310     61.0
         SEP
           08...       1155     3260      --       --       --       --      558       --     18.5       --       --


                                                                    ANC                                        SOLIDS,
                      MAGNE-   POTAS-   SODIUM                    UNFLTRD   CHLO-    FLUO-            SOLIDS,  RESIDUE
                       SIUM,    SIUM,     AD-   SODIUM,           TIT 4.5   RIDE,    RIDE,   SULFATE    DIS-   AT 180
                       DIS-     DIS-    SORP-    DIS-               LAB     DIS-      DIS-    DIS-     SOLVED   DEG. C
                      SOLVED   SOLVED    TION   SOLVED             (MG/L    SOLVED   SOLVED   SOLVED   (TONS     DIS-
             DATE     (MG/L    (MG/L    RATIO    (MG/L    SODIUM    AS      (MG/L    (MG/L    (MG/L     PER     SOLVED
                      AS MG)   AS K)             AS NA)  PERCENT   CACO3)   AS CL)   AS F)   AS SO4)    DAY)    (MG/L)
                     (00925)  (00935)  (00931)  (00930)  (00932)  (90410)  (00940)  (00950)  (00945)  (70302)  (70300)

         OCT
           05...        --       --       --       --       --       --       --       --       --       --       --
           29...        --       --       --       --       --       --       --       --       --       --       --
         NOV
           17...        --       --       --       --       --       --       --       --       --       --       --
         DEC
           03...        --       --       --       --       --       --       --       --       --       --       --
         FEB
           10...        --       --       --       --       --       --       --       --       --       --       --
         APR
           04...        --       --       --       --       --       --       --       --       --       --       --
           25...      49.0      6.0       .9     43.0      19       270     25.0       .2      190     6320      575
         MAY
           24...        --       --       --       --       --       --       --       --       --       --       --
         JUN
           07...        --       --       --       --       --       --       --       --       --       --       --
           23...        --       --       --       --       --       --       --       --       --       --       --
         JUL
           19...        --       --       --       --       --       --       --       --       --       --       --
           26...        --       --       --       --       --       --       --       --       --       --       --
         AUG
           24...      38.0      5.6       .9     37.0      20       259     21.0       .2      120     1880      470
         SEP
           08...        --       --       --       --       --       --       --       --       --       --       --


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

                          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
                05...        --       --       --       --       --       --       --       --       --       --
                29...        --       --       --       --       --       --       --       --       --       --
              NOV
                17...        --       --       --       --       --       --       --       --       --       --
              DEC
                03...        --       --       --       --       --       --       --       --       --       --
              FEB
                10...        --       --       --       --       --       --       --       --       --       --
              APR
                04...        --       --       --       --       --       --       --       --       --       --
                25...       553      3.0      10        2      40.0      10       <.1       1      <1.0      380
              MAY
                24...        --       --       --       --       --       --       --       --       --       --
              JUN
                07...        --       --       --       --       --       --       --       --       --       --
                23...        --       --       --       --       --       --       --       --       --       --
              JUL
                19...        --       --       --       --       --       --       --       --       --       --
                26...        --       --       --       --       --       --       --       --       --       --
              AUG
                24...       439      9.0      20        2      40.0      20       <.1       4      <1.0      340
              SEP
                08...        --       --       --       --       --       --       --       --       --       --


                            TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000

           DAY      MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN

                          OCTOBER                 NOVEMBER                  DECEMBER                    JANUARY

             1     11.7    10.5    11.1       6.2     5.2     5.8       ---     ---     ---       ---     ---     ---
             2     10.5     9.6     9.9       5.2     4.5     4.8       ---     ---     ---       ---     ---     ---
             3      9.6     8.8     9.1       4.6     3.8     4.2       ---     ---     ---       ---     ---     ---
             4      8.9     8.3     8.6       3.8     3.3     3.5       ---     ---     ---       ---     ---     ---
             5      9.0     8.5     8.7       3.9     3.2     3.5       ---     ---     ---       ---     ---     ---
           
             6      8.5     7.9     8.2       3.8     3.0     3.4       ---     ---     ---       ---     ---     ---
             7      8.3     8.0     8.1       4.3     3.2     3.7       ---     ---     ---       ---     ---     ---
             8      9.2     7.9     8.4       5.0     4.0     4.4       ---     ---     ---       ---     ---     ---
             9      9.8     8.8     9.2       5.2     4.4     4.8       ---     ---     ---       ---     ---     ---
            10     10.4     9.5     9.9       4.9     4.3     4.6       ---     ---     ---       ---     ---     ---

            11     10.0     9.5     9.7       4.7     4.1     4.3       ---     ---     ---       ---     ---     ---
            12      9.7     9.3     9.6       4.4     3.9     4.2       ---     ---     ---       ---     ---     ---
            13      9.7     9.0     9.3       5.1     4.1     4.5       ---     ---     ---       ---     ---     ---
            14     10.0     9.2     9.5       4.6     4.0     4.3       ---     ---     ---       ---     ---     ---
            15     10.2     9.7     9.9       4.5     3.9     4.2       ---     ---     ---       ---     ---     ---

            16      9.9     9.2     9.5       ---     ---     ---       ---     ---     ---       ---     ---     ---
            17      9.4     8.9     9.1       ---     ---     ---       ---     ---     ---       ---     ---     ---
            18      8.9     8.4     8.6       3.2     2.6     2.9       ---     ---     ---       ---     ---     ---
            19      8.4     7.6     8.1       2.8     2.0     2.3       ---     ---     ---       ---     ---     ---
            20      7.8     7.0     7.4       2.1     1.6     1.9       ---     ---     ---       ---     ---     ---

            21      8.0     7.3     7.6       2.0     1.3     1.8       ---     ---     ---       ---     ---     ---
            22      7.5     6.9     7.2       2.3     1.7     2.0       ---     ---     ---       ---     ---     ---
            23      6.9     6.1     6.5       1.8     1.3     1.6       ---     ---     ---       ---     ---     ---
            24      6.1     5.5     5.8       1.5      .7     1.1       ---     ---     ---       ---     ---     ---
            25      6.3     5.5     5.8        .8      .1      .4       ---     ---     ---       ---     ---     ---

            26      6.3     5.6     5.9       ---     ---     ---       ---     ---     ---       ---     ---     ---
            27      6.5     5.8     6.1       ---     ---     ---       ---     ---     ---       ---     ---     ---
            28      6.0     5.3     5.7       ---     ---     ---       ---     ---     ---       ---     ---     ---
            29      5.6     5.3     5.5       ---     ---     ---       ---     ---     ---       ---     ---     ---
            30      5.9     5.2     5.5       ---     ---     ---       ---     ---     ---       ---     ---     ---
            31      6.4     5.2     5.7       ---     ---     ---       ---     ---     ---       ---     ---     ---

           MONTH   11.7     5.2     8.0       ---     ---     ---       ---     ---     ---       ---     ---     ---


                            TEMPERATURE, WATER (DEG. C), WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000

           DAY      MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN

                         FEBRUARY                   MARCH                     APRIL                       MAY

             1      ---     ---     ---       ---     ---     ---       ---     ---     ---      14.3    14.0    14.2
             2      ---     ---     ---       ---     ---     ---       ---     ---     ---      14.6    14.3    14.5
             3      ---     ---     ---       ---     ---     ---       ---     ---     ---      15.1    14.6    14.8
             4      ---     ---     ---       ---     ---     ---       ---     ---     ---      15.7    15.1    15.4
             5      ---     ---     ---       ---     ---     ---       6.6     6.4     6.5      16.5    15.7    16.1

             6      ---     ---     ---       ---     ---     ---       6.6     6.5     6.5      17.4    16.5    16.9
             7      ---     ---     ---       ---     ---     ---       6.5     6.4     6.5      18.1    17.4    17.8
             8      ---     ---     ---       ---     ---     ---       6.5     6.4     6.4      18.4    18.1    18.3
             9      ---     ---     ---       ---     ---     ---       6.4     6.3     6.4      18.4    18.3    18.4
            10      ---     ---     ---       ---     ---     ---       6.4     6.3     6.4      18.4    18.2    18.3

            11      ---     ---     ---       ---     ---     ---       6.4     6.2     6.3      18.2    18.0    18.1
            12      ---     ---     ---       ---     ---     ---       6.2     5.9     6.1      18.0    17.5    17.8
            13      ---     ---     ---       ---     ---     ---       6.0     5.7     5.8      17.5    16.6    17.1
            14      ---     ---     ---       ---     ---     ---       5.8     5.7     5.8      16.6    15.4    16.0
            15      ---     ---     ---       ---     ---     ---       5.7     5.3     5.5      15.4    14.8    15.1

            16      ---     ---     ---       ---     ---     ---       5.3     4.9     5.1      14.8    14.5    14.7
            17      ---     ---     ---       ---     ---     ---       5.1     4.9     5.0      14.6    14.5    14.6
            18      ---     ---     ---       ---     ---     ---       5.5     5.1     5.3      14.6    14.6    14.6
            19      ---     ---     ---       ---     ---     ---       6.1     5.5     5.8      14.6    14.6    14.6
            20      ---     ---     ---       ---     ---     ---       6.5     6.1     6.3      14.9    14.6    14.7

            21      ---     ---     ---       ---     ---     ---       7.1     6.5     6.9      15.1    14.9    15.0
            22      ---     ---     ---       ---     ---     ---       8.0     7.1     7.5      15.5    15.1    15.3
            23      ---     ---     ---       ---     ---     ---       9.0     8.0     8.5      15.9    15.5    15.7
            24      ---     ---     ---       ---     ---     ---      10.0     9.0     9.5      16.4    15.9    16.2
            25      ---     ---     ---       ---     ---     ---      11.1    10.0    10.6      16.6    16.4    16.5

            26      ---     ---     ---       ---     ---     ---      12.0    11.1    11.5      17.0    16.6    16.8
            27      ---     ---     ---       ---     ---     ---      12.7    12.0    12.3      17.4    17.0    17.2
            28      ---     ---     ---       ---     ---     ---      13.1    12.7    12.9      17.4    17.3    17.4
            29      ---     ---     ---       ---     ---     ---      13.6    13.1    13.4      17.5    17.3    17.4
            30      ---     ---     ---       ---     ---     ---      14.0    13.6    13.8      17.4    17.3    17.4
            31      ---     ---     ---       ---     ---     ---       ---     ---     ---      17.6    17.4    17.5

           MONTH    ---     ---     ---       ---     ---     ---       ---     ---     ---      18.4    14.0    16.3

           DAY      MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN


                           JUNE                     JULY                     AUGUST                    SEPTEMBER

             1     17.6    17.5    17.6      21.0    20.5    20.7      25.3    24.9    25.1       ---     ---     ---
             2     17.5    17.3    17.4      21.5    21.0    21.2      25.5    24.6    25.0       ---     ---     ---
             3     17.4    17.2    17.3      22.0    21.5    21.7      25.3    24.7    24.9       ---     ---     ---
             4     17.2    17.0    17.1      22.4    22.0    22.2      25.2    24.3    24.8       ---     ---     ---
             5     17.1    17.0    17.0      22.9    22.3    22.5      25.2    24.8    25.0       ---     ---     ---
           
             6     18.6    17.1    17.6      23.6    22.9    23.1      25.1    24.9    25.0       ---     ---     ---
             7     20.6    18.4    19.4      23.7    23.5    23.6      25.0    24.7    24.9       ---     ---     ---
             8     22.0    20.0    20.9      23.9    23.6    23.7      25.0    24.8    24.9       ---     ---     ---
             9     23.1    21.0    21.9      24.1    23.7    23.8      25.0    24.8    24.9      18.8    18.7    18.8
            10     23.7    22.5    23.0      24.5    24.0    24.2      25.2    24.8    24.9      18.9    18.8    18.9

            11     23.8    22.2    23.0      24.5    24.3    24.4      25.5    24.8    25.1      19.0    18.9    18.9
            12     24.3    22.9    23.5      24.6    24.3    24.4      26.1    25.2    25.6      18.9    18.5    18.7
            13     23.8    23.2    23.4      24.8    24.5    24.6      26.0    25.5    25.7      18.6    18.4    18.4
            14     23.2    21.5    22.2      25.2    24.7    24.9      25.7    25.4    25.5      18.4    17.9    18.1
            15     21.5    20.5    21.0      25.6    25.2    25.3      25.4    24.9    25.1      18.0    17.4    17.7

            16     20.5    18.8    19.5      25.7    25.5    25.6      24.9    23.7    24.4      17.6    17.2    17.4
            17     19.2    18.0    18.6      25.7    25.0    25.3      23.7    22.9    23.2      17.4    17.2    17.3
            18     19.5    18.0    18.7      25.0    24.2    24.6      22.9    22.2    22.4      17.6    17.3    17.4
            19     19.3    18.8    19.1      24.2    22.2    23.3      22.2    21.9    22.0      17.9    17.6    17.7
            20     19.1    18.2    18.6      22.3    21.5    21.9      21.9    21.6    21.7      17.9    17.2    17.6

            21     18.2    17.6    17.9      22.2    21.1    21.7      21.6    21.4    21.6      17.2    16.3    16.6
            22      ---     ---     ---      22.2    21.5    21.9      21.6    21.5    21.6      16.3    14.7    15.5
            23      ---     ---     ---      22.7    21.7    22.2      22.1    21.5    21.7      14.7    13.8    14.1
            24     19.1    18.4    18.7      22.7    21.9    22.3      22.4    21.8    22.0      14.0    13.1    13.4
            25     19.6    19.0    19.3      22.7    22.3    22.5      22.8    22.2    22.4      13.1    12.6    12.8

            26     20.0    19.6    19.8      23.7    22.5    23.0       ---     ---     ---      12.9    12.5    12.7
            27     20.1    19.9    20.0      24.0    23.0    23.4       ---     ---     ---      12.7    12.5    12.6
            28     20.1    19.9    20.0      25.1    23.8    24.2       ---     ---     ---      12.6    12.4    12.5
            29     20.1    19.9    20.0      25.6    24.6    25.0       ---     ---     ---      12.7    12.4    12.6
            30     20.5    20.1    20.3      25.8    25.0    25.4       ---     ---     ---      13.1    12.7    12.9
            31      ---     ---     ---      25.6    25.1    25.3       ---     ---     ---       ---     ---     ---

           MONTH    ---     ---     ---      25.8    20.5    23.5       ---     ---     ---       ---     ---     ---


                SPECIFIC CONDUCTANCE (MICROSIEMENS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000

           DAY      MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN

                          OCTOBER                 NOVEMBER                  DECEMBER                    JANUARY

             1      728     721     725       720     700     711       ---     ---     ---       ---     ---     ---
             2      730     722     725       717     711     714       ---     ---     ---       ---     ---     ---
             3      722     712     717       714     698     707       ---     ---     ---       ---     ---     ---
             4      714     699     706       698     684     689       ---     ---     ---       ---     ---     ---
             5      702     692     698       702     692     699       ---     ---     ---       ---     ---     ---

             6      694     688     691       704     696     700       ---     ---     ---       ---     ---     ---
             7      703     690     693       699     694     696       ---     ---     ---       ---     ---     ---
             8      719     703     712       701     694     698       ---     ---     ---       ---     ---     ---
             9      724     703     716       699     694     697       ---     ---     ---       ---     ---     ---
            10      723     691     702       704     697     701       ---     ---     ---       ---     ---     ---

            11      709     698     704       703     699     701       ---     ---     ---       ---     ---     ---
            12      706     695     701       710     700     705       ---     ---     ---       ---     ---     ---
            13      699     687     695       706     695     699       ---     ---     ---       ---     ---     ---
            14      688     677     684       708     701     703       ---     ---     ---       ---     ---     ---
            15      682     672     677       704     695     699       ---     ---     ---       ---     ---     ---

            16      693     677     685       ---     ---     ---       ---     ---     ---       ---     ---     ---
            17      695     672     681       ---     ---     ---       ---     ---     ---       ---     ---     ---
            18      699     679     685       705     696     701       ---     ---     ---       ---     ---     ---
            19      695     682     689       729     702     711       ---     ---     ---       ---     ---     ---
            20      696     690     693       737     729     733       ---     ---     ---       ---     ---     ---

            21      695     688     692       738     716     729       ---     ---     ---       ---     ---     ---
            22      695     688     691       722     709     714       ---     ---     ---       ---     ---     ---
            23      699     693     696       716     696     708       ---     ---     ---       ---     ---     ---
            24      707     697     702       709     698     702       ---     ---     ---       ---     ---     ---
            25      709     703     706       718     707     713       ---     ---     ---       ---     ---     ---

            26      711     700     706       ---     ---     ---       ---     ---     ---       ---     ---     ---
            27      709     699     703       ---     ---     ---       ---     ---     ---       ---     ---     ---
            28      716     699     708       ---     ---     ---       ---     ---     ---       ---     ---     ---
            29      702     695     699       ---     ---     ---       ---     ---     ---       ---     ---     ---
            30      705     696     700       ---     ---     ---       ---     ---     ---       ---     ---     ---
            31      713     696     705       ---     ---     ---       ---     ---     ---       ---     ---     ---

           MONTH    730     672     700       ---     ---     ---       ---     ---     ---       ---     ---     ---

           DAY      MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN


                         FEBRUARY                   MARCH                     APRIL                       MAY

             1      ---     ---     ---       ---     ---     ---       ---     ---     ---       940     924     927
             2      ---     ---     ---       ---     ---     ---       ---     ---     ---       926     924     925
             3      ---     ---     ---       ---     ---     ---       ---     ---     ---       950     923     934
             4      ---     ---     ---       ---     ---     ---       ---     ---     ---       927     923     925
             5      ---     ---     ---       ---     ---     ---       919     883     896       923     919     922

             6      ---     ---     ---       ---     ---     ---       920     878     907       922     918     920
             7      ---     ---     ---       ---     ---     ---       903     891     898       927     918     921
             8      ---     ---     ---       ---     ---     ---       893     876     887       929     919     925
             9      ---     ---     ---       ---     ---     ---       898     881     889       929     920     925
            10      ---     ---     ---       ---     ---     ---       893     879     885       938     916     924

            11      ---     ---     ---       ---     ---     ---       879     875     877       919     900     904
            12      ---     ---     ---       ---     ---     ---       878     875     876       901     896     898
            13      ---     ---     ---       ---     ---     ---       898     877     887       897     890     894
            14      ---     ---     ---       ---     ---     ---       890     882     885       894     889     892
            15      ---     ---     ---       ---     ---     ---       886     881     883       913     891     897

            16      ---     ---     ---       ---     ---     ---       883     872     878       939     912     931
            17      ---     ---     ---       ---     ---     ---       873     868     871       948     938     944
            18      ---     ---     ---       ---     ---     ---       873     868     870       943     940     941
            19      ---     ---     ---       ---     ---     ---       870     867     869       940     924     932
            20      ---     ---     ---       ---     ---     ---       868     866     867       924     921     922

            21      ---     ---     ---       ---     ---     ---       882     866     873       943     919     931
            22      ---     ---     ---       ---     ---     ---       871     869     870       925     918     923
            23      ---     ---     ---       ---     ---     ---       869     867     868       918     912     915
            24      ---     ---     ---       ---     ---     ---       871     867     869       914     907     911
            25      ---     ---     ---       ---     ---     ---       872     869     871       907     901     904

            26      ---     ---     ---       ---     ---     ---       879     872     876       902     899     900
            27      ---     ---     ---       ---     ---     ---       895     870     872       903     897     901
            28      ---     ---     ---       ---     ---     ---       953     895     949       900     896     897
            29      ---     ---     ---       ---     ---     ---       958     953     956       897     886     894
            30      ---     ---     ---       ---     ---     ---       967     940     954       886     881     884
            31      ---     ---     ---       ---     ---     ---       ---     ---     ---       881     878     880

           MONTH    ---     ---     ---       ---     ---     ---       ---     ---     ---       950     878     914


                SPECIFIC CONDUCTANCE (MICROSIEMENS/CM AT 25 DEG. C), WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000

           DAY      MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN       MAX     MIN    MEAN

                           JUNE                     JULY                     AUGUST                    SEPTEMBER

             1      879     821     859       613     568     589       824     810     816       ---     ---     ---
             2      827     813     822       669     613     642       833     820     824       ---     ---     ---
             3      830     820     826       738     669     702       837     831     834       ---     ---     ---
             4      827     810     820       789     738     767       848     837     841       ---     ---     ---
             5      810     793     800       786     769     782       856     848     853       ---     ---     ---

             6      795     750     780       780     766     771       857     854     855       ---     ---     ---
             7      802     770     786       828     770     781       860     855     857       ---     ---     ---
             8      809     802     806       824     778     807       862     859     860       ---     ---     ---
             9      811     795     803       778     664     693       863     856     861       585     571     579
            10      800     790     796       737     665     700       856     833     848       602     579     596

            11      801     786     792       724     688     703       833     806     820       625     594     609
            12      859     792     813       767     721     743       806     791     797       637     624     632
            13      825     805     816       796     763     776       791     784     787       653     631     640
            14      808     776     789       799     774     786       784     773     779       660     651     655
            15      817     769     785       796     784     788       774     746     758       672     654     661

            16      789     739     766       827     789     813       746     710     734       719     665     679
            17      739     714     730       824     803     811       710     695     699       714     683     694
            18      724     677     696       803     791     797       695     679     684       697     683     691
            19      820     724     773       832     802     814       689     680     683       696     686     690
            20      822     288     593       858     828     838       706     689     697       716     696     711

            21      295     235     264       887     858     866       716     705     711       716     698     704
            22      ---     ---     ---       917     887     905       725     715     720       717     704     708
            23      ---     ---     ---       894     880     885       736     725     731       713     700     706
            24      320     286     304       881     855     869       740     733     737       739     614     694
            25      353     320     337       855     844     850       737     706     717       620     598     604

            26      392     353     372       849     840     844       ---     ---     ---       683     620     666
            27      435     392     413       856     848     852       ---     ---     ---       702     677     691
            28      476     435     455       854     849     852       ---     ---     ---       695     684     687
            29      523     476     500       849     830     841       ---     ---     ---       688     681     684
            30      568     523     545       837     830     833       ---     ---     ---       714     688     694
            31      ---     ---     ---       839     820     831       ---     ---     ---       ---     ---     ---

           MONTH    ---     ---     ---       917     568     791       ---     ---     ---       ---     ---     ---

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