ANALYSES OF SAMPLES COLLECTED AT LAKE SAKAKAWEA WATER-QUALITY SITES

Table of Contents

Lake Sakakawea Van Hook Arm 1

Lake Sakakawea Van Hook Arm 2

Lake Sakakawea Van Hook Arm 3

Lake Sakakawea Van Hook Arm 4

Lake Sakakawea Van Hook Arm 5

Lake Sakakawea Van Hook Arm 6

Lake Sakakawea Van Hook Arm 7

Lake Sakakawea Van Hook Arm 8

Lake Sakakawea Van Hook Arm 9

Lake Sakakawea Van Hook Arm 10

Lake Sakakawea Van Hook Arm 11

Lake Sakakawea Deepwater Bay 1

Lake Sakakawea Deepwater Bay 2

Lake Sakakawea Deepwater Bay 3

Lake Sakakawea Deepwater Bay 4

Lake Sakakawea Deepwater Bay 5

Lake Sakakawea Deepwater Bay 6

Lake Sakakawea Near Lake Audubon

Lake Audubon Near Snake Creek Pump Plant

475516102245900 LAKE SAKAKAWEA, VAN HOOK ARM 1

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              16...       1635    22.0       .50     568      7.9       .2     14.4
                              16...       1636      --      2.2      598      8.0       .4     14.0
                              16...       1637      --      4.0      598      8.0       .4     13.8
                              16...       1638      --      5.6      600      8.0       .5     13.8
                              16...       1639      --      6.7      603      8.0       .6     13.6
                            MAY
                              19...       1010    25.6       .00     616      8.4     10.0     11.5
                              19...       1011      --      1.7      617      8.4      9.6     11.3
                              19...       1012      --      3.4      618      8.4      9.5     10.8
                              19...       1013      --      5.2      618      8.4      9.4     10.8
                              19...       1014      --      6.8      617      8.4      9.2     10.6
                              19...       1015      --      7.8      619      8.4      8.9     10.6
                            AUG
                              02...       1510    41.3       .00     619      8.3     22.4      8.7
                              02...       1511      --      2.5      619      8.2     21.5      8.4
                              02...       1512      --      5.0      617      8.2     21.2      8.2
                              02...       1513      --      7.0      621      8.2     21.1      8.2
                              02...       1514      --      9.5      619      8.2     20.9      7.9
                              02...       1515      --     12.6      627      7.9     19.9      4.6
                            SEP
                              15...       0825    34.8       .00     570      7.8     15.9      8.8
                              15...       0826      --      2.1      570      7.9     16.0      8.6
                              15...       0827      --      3.9      570      8.0     16.0      8.6
                              15...       0828      --      5.8      571      8.0     15.9      8.6
                              15...       0829      --      8.2      571      8.1     15.8      8.8
                              15...       0830      --     10.0      573      8.1     15.6      8.8
                              15...       0831      --     10.6      574      8.1     15.6      8.7


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              16...       105      721      1.70    59.0     -7.0      125     <5.0
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                            MAY
                              19...       108      722       --     51.0     18.5      180     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              02...       108      710       --     66.0     26.0       30      7.0
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                            SEP
                              15...        94      718       --     83.0      9.0       45     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475519102240300 LAKE SAKAKAWEA, VAN HOOK ARM 2

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                DEPTH    DEPTH     PH       SPE-
                                TO TOP  TO BOT-   WATER    CIFIC    HARD-             MAGNE-   POTAS-   SODIUM
                                  OF    TOM OF    WHOLE     CON-    NESS    CALCIUM    SIUM,    SIUM,     AD-
                                SAMPLE   SAMPLE    LAB     DUCT-    TOTAL    DIS-      DIS-     DIS-    SORP-
                                INTER-   INTER-  (STAND-   ANCE     (MG/L    SOLVED   SOLVED   SOLVED    TION
              DATE      TIME   VAL(IN   VAL(IN     ARD      LAB      AS      (MG/L    (MG/L    (MG/L    RATIO    SODIUM
                               METERS)  METERS)   UNITS)  (US/CM)   CACO3)   AS CA)   AS MG)   AS K)            PERCENT
                               (82047)  (82048)  (00403)  (90095)  (00900)  (00915)  (00925)  (00935)  (00931)  (00932)

          FEB
            16...       1610      .5      1.0       --      614      200      50       19        4        1       34
            16...       1615     4.5      5.0       --      613      200      49       19        4        2       34
          MAY
            19...       1000      .0       --       --      604      210      51       20        3        2       34
            19...       1005     7.1       --       --      612      210      52       20        4        2       34
          AUG
            03...       0840      .0       --       --      622      210      51       21        4        2       36
            03...       0845    11.8       --      7.7      624      210      49       20        4        2       36
          SEP
            15...       0845      .0       --      8.2      557      190      45       18        4        2       35
            15...       0850     7.8       --      8.1      556      190      47       19        4        2       37


                                 ANC                       NITRO-
                               UNFLTRD   CHLO-            GEN,AM-   NITRO-   NITRO-   NITRO-            PHOS-
                      SODIUM,  TIT 4.5   RIDE,   SULFATE  MONIA +    GEN,     GEN,     GEN,    NITRO-  PHORUS    PHOS-
                       DIS-      LAB     DIS-     DIS-    ORGANIC  AMMONIA  NO2+NO3  ORGANIC    GEN,     DIS-   PHORUS
                      SOLVED    (MG/L    SOLVED   SOLVED   TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    SOLVED   TOTAL
              DATE     (MG/L     AS      (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L
                       AS NA)   CACO3)   AS CL)  AS SO4)   AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)
                      (00930)  (90410)  (00940)  (00945)  (00625)  (00610)  (00630)  (00605)  (00600)  (00666)  (00665)

          FEB
            16...       49       160      8.5      150      .10      .03      .04       .07     .14      .05      .07
            16...       49       160      8.6      150      .14      .02      .03       .12     .17     <.01      .07
          MAY
            19...       50       160      8.7      150      .19     <.01      .02       --      .21     <.01      .02
            19...       51       160      8.8      160      .21     <.01      .02       --      .23     <.01      .05
          AUG
            03...       56       160      8.6      160      .14     <.01      .03       --      .17     <.01     <.02
            03...       54       160      8.6      160      .20     <.01      .04       --      .24     <.01     <.02
          SEP
            15...       48       130      7.6      140      .17     <.01      .11       --      .28     <.01     <.02
            15...       55       140      7.5      140      .17     <.01      .11       --      .28      .02     <.02


                           SOLIDS,  CHLOR-A  CHLOR-B
                           SUM OF    PHYTO-   PHYTO-  ALUMI-                               BERYL-
                           CONSTI-   PLANK-   PLANK-    NUM,    ANTI-            BARIUM,    LIUM   BORON,   CADMIUM
                           TUENTS,    TON      TON     TOTAL    MONY,   ARSENIC   TOTAL    TOTAL    TOTAL    TOTAL
                             DIS-   CHROMO   CHROMO   RECOVER   TOTAL    TOTAL   RECOVER  RECOVER  RECOVER  RECOVER
                   DATE     SOLVED  FLUOROM  FLUOROM   -ABLE    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE    -ABLE
                            (MG/L)   (UG/L)   (UG/L)   (UG/L)   AS SB)   AS AS)   (UG/L)   (UG/L)   (UG/L)   (UG/L)
                           (70301)  (70953)  (70954)  (01104)  (01097)  (01002)  (01009)  (00998)  (00999)  (01113)

               FEB
                 16...       372     <3.0     <1.0      <50      <1        3       57       <1       150      <1
                 16...       372       --       --      <50      <1        3       56       <1       150      <1
               MAY
                 19...       387     <3       <1         51      <1        2       59       <1       140      <1
                 19...       390       --       --      <50      <1        2       63       <1       140      <1
               AUG
                 03...       392     <3.0     <1.0      <50      <1       <1       60       <1       140      <1
                 03...       386       --       --      <50      <1        3       58       <1       140      <1
               SEP
                 15...       341     <3.0     <1.0      <50      <1        2       51       <1       140      <1
                 15...       352       --       --      170      <1        3       52       <1       170      <1


                                                                                                    THAL-
                            CHRO-             IRON,            MANGAN-                              LIUM,
                            MIUM,   COPPER,   TOTAL    LEAD,     ESE    NICKEL,   SELE-   SILVER,   TOTAL    ZINC,
                            TOTAL    TOTAL    RECOV-   TOTAL    TOTAL    TOTAL    NIUM,    TOTAL    RECOV-   TOTAL
                           RECOVER  RECOVER   ERABLE  RECOVER  RECOVER  RECOVER   TOTAL   RECOVER   ERABLE  RECOVER
                   DATE     -ABLE    -ABLE    (UG/L    -ABLE   - ABLE    -ABLE    (UG/L    -ABLE    (UG/L    -ABLE
                            (UG/L)   (UG/L)   AS FE)   (UG/L)   (UG/L)   (UG/L)   AS SE)   (UG/L)   AS TL)   (UG/L)
                           (01118)  (01119)  (01045)  (01114)  (01123)  (01074)  (01147)  (01079)  (01128)  (01094)

               FEB
                 16...       <1        2        <7      <1        <2       3       <1       <1       <1        7
                 16...       <1        2        <7      <1        <2       3       <1       <1       <1        7
               MAY
                 19...       <1        4        33      <1        <2       3       <1       <1       <1        7
                 19...       <1        2       210      <1        <2       4       <1       <1       <1        3
               AUG
                 03...       <1        2        <7      <1        <2       3       <1       <1       <1       10
                 03...       <1        1        12      <1        <2       3        2       <1       <1       10
               SEP
                 15...       <1        1       <10      <1       <10       2       <1       <1       <1        6
                 15...       <1        3       <10      <1       <10       3       <1       <1       <1       24

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              16...       1605    16.4       .50     595      8.0       .2     14.5
                              16...       1606      --      2.0      591      8.0       .3     13.8
                              16...       1607      --      4.2      594      8.0       .5     13.7
                              16...       1608      --      5.0      595      8.0       .7     13.6
                            MAY
                              19...       0955    23.3       .00     616      8.4      9.8     11.4
                              19...       0956      --      1.9      614      8.4      9.6     11.2
                              19...       0957      --      4.2      617      8.4      9.6     10.9
                              19...       0958      --      6.0      617      8.4      9.5     10.8
                              19...       0959      --      7.1      619      8.4      9.5     10.8
                            AUG
                              03...       0830    38.7       .00     621      8.2     21.0      8.5
                              03...       0831      --      2.4      621      8.2     21.0      8.4
                              03...       0832      --      4.7      622      8.2     21.0      8.3
                              03...       0833      --      7.3      621      8.2     20.9      8.2
                              03...       0834      --     10.2      633      8.2     20.7      7.9
                              03...       0835      --     11.8      619      7.8     18.8      3.9
                            SEP
                              15...       0840    25.6       .00     563      8.2     16.0      8.8
                              15...       0841      --      2.2      574      8.2     16.0      8.6
                              15...       0842      --      3.9      573      8.2     16.0      8.7
                              15...       0843      --      6.2      570      8.2     16.0      8.6
                              15...       0844      --      7.8      566      8.2     16.0      8.6


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              16...       106      721      1.80    92.0     -7.0      125     <5.0
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                            MAY
                              19...       106      722       --     55.0     21.0      280     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       102      718       --     98.0     17.0      330     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        95      718       --     48.0     10.0       45     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475530102225400 LAKE SAKAKAWEA, VAN HOOK ARM 3

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              16...       1545    49.9       .50     595      8.0       .3     14.1
                              16...       1546      --      2.1      593      8.0       .4     13.9
                              16...       1547      --      4.5      590      8.0       .4     13.6
                              16...       1548      --      6.8      586      8.0       .6     13.2
                              16...       1549      --      9.8      585      8.0      1.0     12.9
                              16...       1550      --     13.0      595      8.0      1.4     12.3
                              16...       1551      --     15.2      595      7.9      2.0     11.4
                            MAY
                              19...       0935    54.0       .00     618      8.5     10.3     11.6
                              19...       0936      --      2.6      619      8.5      9.9     11.5
                              19...       0937      --      4.9      618      8.4      9.8     11.3
                              19...       0938      --      7.5      618      8.4      9.7     11.1
                              19...       0939      --      9.9      617      8.4      9.3     11.0
                              19...       0940      --     12.4      615      8.4      9.1     10.6
                              19...       0945      --     14.9      616      8.3      8.9     10.4
                              19...       0946      --     16.6      611      8.3      8.5     10.2
                            AUG
                              02...       1530    61.0       .00     616      8.2     21.6      8.4
                              02...       1531      --      2.5      617      8.2     21.4      8.3
                              02...       1532      --      4.9      622      8.2     20.9      8.1
                              02...       1533      --      7.5      619      8.2     20.6      7.1
                              02...       1534      --      9.9      616      8.2     20.5      7.8
                              02...       1535      --     12.3      616      7.9     18.9      6.0
                              02...       1536      --     15.0      625      7.8     17.6      4.8
                              02...       1537      --     18.6      619      7.7     16.0      4.6
                            SEP
                              15...       0850    58.1       .00     570      8.2     16.1      8.6
                              15...       0851      --      2.1      571      8.2     16.1      8.6
                              15...       0852      --      3.8      566      8.2     16.1      8.5
                              15...       0853      --      5.8      569      8.2     16.1      8.5
                              15...       0854      --      7.8      570      8.2     16.1      8.5
                              15...       0855      --     10.0      567      8.2     16.1      8.4
                              15...       0856      --     12.1      566      8.2     16.1      8.4
                              15...       0857      --     13.9      569      8.2     16.1      8.4
                              15...       0858      --     15.9      570      8.2     15.9      8.6
                              15...       0859      --     17.7      573      8.2     15.8      8.6

                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              16...       103      721      1.60    54.0     -5.0      140     <5.0
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                            MAY
                              19...       109      722       --     55.0     15.5      180     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              02...       103      711       --     74.0     24.5       20      6.0
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                            SEP
                              15...        93      718       --     48.0     10.0       45     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475524102213100 LAKE SAKAKAWEA, VAN HOOK ARM 4

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                DEPTH    DEPTH     PH       SPE-
                                TO TOP  TO BOT-   WATER    CIFIC    HARD-             MAGNE-   POTAS-   SODIUM
                                  OF    TOM OF    WHOLE     CON-    NESS    CALCIUM    SIUM,    SIUM,     AD-
                                SAMPLE   SAMPLE    LAB     DUCT-    TOTAL    DIS-      DIS-     DIS-    SORP-
                                INTER-   INTER-  (STAND-   ANCE     (MG/L    SOLVED   SOLVED   SOLVED    TION
              DATE      TIME   VAL(IN   VAL(IN     ARD      LAB      AS      (MG/L    (MG/L    (MG/L    RATIO    SODIUM
                               METERS)  METERS)   UNITS)  (US/CM)   CACO3)   AS CA)   AS MG)   AS K)            PERCENT
                               (82047)  (82048)  (00403)  (90095)  (00900)  (00915)  (00925)  (00935)  (00931)  (00932)

          FEB
            16...       1440      .4       .9      7.7      612      190      47       18        3        1       34
            16...       1445    17.1     17.6      7.2      615      200      50       19        4        1       34
          MAY
            19...       0850      .0       --      8.0      615      210      52       21        4        2       36
            19...       0855     8.0       --      7.6      606      210      52       20        4        2       34
          AUG
            03...       0900      .0       --      7.2      623      200      49       20        4        2       36
            03...       0910    11.0       --      6.9      624      210      50       20        4        2       36
            03...       0915    19.5       --      6.8      620      210      49       20        4        2       36
          SEP
            15...       0920      .0       --      8.2      559      180      45       18        3        2       35
            15...       0925    19.2       --      8.2      560      190      45       18        4        2       35


                                 ANC                       NITRO-
                               UNFLTRD   CHLO-            GEN,AM-   NITRO-   NITRO-   NITRO-            PHOS-
                      SODIUM,  TIT 4.5   RIDE,   SULFATE  MONIA +    GEN,     GEN,     GEN,    NITRO-  PHORUS    PHOS-
                       DIS-      LAB     DIS-     DIS-    ORGANIC  AMMONIA  NO2+NO3  ORGANIC    GEN,     DIS-   PHORUS
                      SOLVED    (MG/L    SOLVED   SOLVED   TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    SOLVED   TOTAL
              DATE     (MG/L     AS      (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L
                       AS NA)   CACO3)   AS CL)  AS SO4)   AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)
                      (00930)  (90410)  (00940)  (00945)  (00625)  (00610)  (00630)  (00605)  (00600)  (00666)  (00665)

          FEB
            16...       46       160      8.4      140      .11      .02      .04       .09      .15    <.01      .07
            16...       49       160      8.4      140      .12      .04      .07       .09      .19    <.01      .09
          MAY
            19...       56       160      8.7      160      .19     <.01     <.02       --       --     <.01      .03
            19...       52       160      8.6      160      .23     <.01      .06       --       .29    <.01      .02
          AUG
            03...       54       160      8.6      160      .13     <.01      .04       --       .17    <.01      .02
            03...       54       160      8.6      160      .15     <.01      .18       --       .33    <.01      .03
            03...       54       160      8.5      160      .22     <.01      .05       --       .27    <.01     <.02
          SEP
            15...       48       130      7.5      140      .14     <.01      .11       --       .25     .01     <.02
            15...       48       130      7.4      140      .16     <.01      .12       --       .28    <.01      .03


                           SOLIDS,  CHLOR-A  CHLOR-B
                           SUM OF    PHYTO-   PHYTO-  ALUMI-                               BERYL-
                           CONSTI-   PLANK-   PLANK-    NUM,    ANTI-            BARIUM,    LIUM   BORON,   CADMIUM
                           TUENTS,    TON      TON     TOTAL    MONY,   ARSENIC   TOTAL    TOTAL    TOTAL    TOTAL
                             DIS-   CHROMO   CHROMO   RECOVER   TOTAL    TOTAL   RECOVER  RECOVER  RECOVER  RECOVER
                   DATE     SOLVED  FLUOROM  FLUOROM   -ABLE    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE    -ABLE
                            (MG/L)   (UG/L)   (UG/L)   (UG/L)   AS SB)   AS AS)   (UG/L)   (UG/L)   (UG/L)   (UG/L)
                           (70301)  (70953)  (70954)  (01104)  (01097)  (01002)  (01009)  (00998)  (00999)  (01113)

               FEB
                 16...       362     <3.0     <1.0      <50      <1        3       55       <1       140      <1
                 16...       371       --       --      <50      <1        3       58       <1       160      <1
               MAY
                 19...       399      3.0     <1.0      <50      <1        2       61       <1       140      <1
                 19...       389       --       --       59      <1        2       62       <1       140      <1
               AUG
                 03...       385     <3.0     <1.0      <50      <1       <1       57       <1       140      <1
                 03...       388       --       --      <50      <1        2       58       <1       150      <1
                 03...       388       --       --      <50      <1        2       56       <1       140      <1
               SEP
                 15...       339     <3.0     <1.0      <50      <1        2       51       <1       140      <1
                 15...       340       --       --      <50      <1        2       50       <1       150      <1

                                                                                                    THAL-
                            CHRO-             IRON,            MANGAN-                              LIUM,
                            MIUM,   COPPER,   TOTAL    LEAD,     ESE    NICKEL,   SELE-   SILVER,   TOTAL    ZINC,
                            TOTAL    TOTAL    RECOV-   TOTAL    TOTAL    TOTAL    NIUM,    TOTAL    RECOV-   TOTAL
                           RECOVER  RECOVER   ERABLE  RECOVER  RECOVER  RECOVER   TOTAL   RECOVER   ERABLE  RECOVER
                   DATE     -ABLE    -ABLE    (UG/L    -ABLE   - ABLE    -ABLE    (UG/L    -ABLE    (UG/L    -ABLE
                            (UG/L)   (UG/L)   AS FE)   (UG/L)   (UG/L)   (UG/L)   AS SE)   (UG/L)   AS TL)   (UG/L)
                           (01118)  (01119)  (01045)  (01114)  (01123)  (01074)  (01147)  (01079)  (01128)  (01094)

               FEB
                 16...       <1        2        <7      <1        <2       3       <1       <1       <1        7
                 16...       <1        2        <7      <1        <2       4        1       <1       <1        8
               MAY
                 19...       <1        1        <7      <1        <2       3       <1       <1       <1        5
                 19...       <1        1        <7      <1        10       3       <1       <1       <1        5
               AUG
                 03...       <1        5        <7      <1        <2       3       <1       <1       <1        9
                 03...       <1        1        <7      <1        <2       3        1       <1       <1       10
                 03...       <1        1        <7      <1        <2       2        1       <1       <1       10
               SEP
                 15...       <1        1       <10      <1       <10       2       <1       <1       <1        6
                 15...       <1        1       <10      <1       <10       2       <1       <1       <1        7


                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              16...       1430    57.7       .40     590      7.7       .6     13.4
                              16...       1431      --      1.9      583      7.8       .6     13.2
                              16...       1432      --      4.2      582      7.8       .6     13.0
                              16...       1433      --      7.0      584      7.9       .8     12.8
                              16...       1434      --      9.3      580      7.9       .9     12.9
                              16...       1435      --     12.6      585      7.9      1.4     12.5
                              16...       1436      --     15.2      600      7.8      1.9     11.3
                              16...       1437      --     17.6      600      7.7      3.5      6.2
                            MAY
                              19...       0840    61.7       .00     633      8.3     10.4     11.3
                              19...       0841      --      3.0      631      8.3     10.1     11.3
                              19...       0842      --      5.9      623      8.3      9.8     11.0
                              19...       0843      --      9.1      628      9.3      9.8     10.8
                              19...       0844      --     12.1      617      8.3      9.1     10.8
                              19...       0845      --     14.8      618      8.2      8.2     10.4
                              19...       0846      --     17.8      618      8.2      8.1      9.8
                              19...       0847      --     18.8      619      8.2      8.0      9.6
                            AUG
                              03...       0850    64.0       .00     619      8.2     20.4      8.2
                              03...       0851      --      2.5      618      8.2     20.4      8.1
                              03...       0852      --      5.0      620      8.2     20.4      8.1
                              03...       0853      --      7.4      620      8.2     20.4      8.1
                              03...       0854      --     10.2      613      8.1     20.2      7.5
                              03...       0855      --     12.4      619      7.9     18.6      5.5
                              03...       0856      --     15.0      611      7.8     17.9      5.2
                              03...       0857      --     17.4      625      7.7     16.9      4.6
                              03...       0858      --     19.5      626      7.7     15.9      3.9
                            SEP
                              15...       0905    63.0       .00     570      8.2     16.2      8.6
                              15...       0906      --      2.1      561      8.2     16.2      8.5
                              15...       0907      --      3.9      577      8.2     16.2      8.5
                              15...       0908      --      6.1      573      8.2     16.2      8.4
                              15...       0909      --      8.1      570      8.2     16.2      8.4
                              15...       0910      --      9.9      576      8.2     16.2      8.4
                              15...       0911      --     11.8      582      8.2     16.2      8.4
                              15...       0912      --     14.0      575      8.2     16.2      8.4
                              15...       0913      --     15.9      573      8.2     16.2      8.4
                              15...       0914      --     17.9      568      8.2     16.2      8.4
                              15...       0915      --     19.2      562      8.2     16.2      8.3

                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              16...        99      720      1.40    59.0      3.0       60     <5.0
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                            MAY
                              19...       107      722       --     51.0     16.0      160     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...        96      718       --     70.0     17.0      300     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        93      718       --     44.0     10.0       45     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475519102195500 LAKE SAKAKAWEA, VAN HOOK ARM 5

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              16...       1305    16.4       .50     599      7.8       .6     14.6
                              16...       1306      --      2.6      596      7.9       .5     13.9
                              16...       1307      --      4.3      591      7.9       .6     13.5
                              16...       1308      --      5.0      592      7.9       .6     13.2
                            MAY
                              19...       0915    31.2       .00     618      8.5     10.7     12.0
                              19...       0916      --      2.5      619      8.5     10.1     11.7
                              19...       0917      --      4.6      621      8.4     10.0     11.4
                              19...       0918      --      7.2      624      8.4     10.0     11.2
                              19...       0919      --      9.5      631      8.4     10.0     11.1
                            AUG
                              02...       1555    34.8       .00     622      8.2     20.7      8.3
                              02...       1556      --      2.4      621      8.2     20.6      8.2
                              02...       1557      --      5.0      620      8.1     20.0      7.6
                              02...       1558      --      7.4      620      8.1     19.8      7.3
                              02...       1559      --     10.1      622      7.8     17.9      4.5
                              02...       1600      --     10.6      621      7.8     17.9      4.5
                            SEP
                              15...       0925    32.1       .00     570      8.2     15.8      8.7
                              15...       0926      --      2.2      570      8.2     15.8      8.6
                              15...       0927      --      3.9      570      8.2     15.8      8.5
                              15...       0928      --      5.9      579      8.3     15.0      9.1
                              15...       0929      --      7.8      581      8.3     14.8      9.0
                              15...       0930      --      9.8      583      8.3     14.7      9.0


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              16...       108      720      1.60    87.0     -7.0       60     <5.0
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                              16...        --       --       --       --       --       --       --
                            MAY
                              19...       114      722       --     51.0     16.0      180     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              02...        99      712       --     42.0     24.5       30      7.0
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                            SEP
                              15...        93      718       --     51.0     10.0       45     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475304102195400 LAKE SAKAKAWEA, VAN HOOK ARM 6

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       1140    39.4       .70     589      7.7       .7     13.9
                              17...       1141      --      2.2      590      7.8       .3     13.9
                              17...       1142      --      4.2      590      7.9       .3     13.7
                              17...       1143      --      6.9      585      7.9       .4     13.5
                              17...       1144      --     10.0      587      7.9       .8     12.9
                              17...       1145      --     12.0      588      7.9      1.2     12.5
                            MAY
                              19...       1050    42.3       .00     617      8.5      9.5     11.7
                              19...       1051      --      2.7      617      8.5      9.3     11.4
                              19...       1052      --      5.1      614      8.4      9.2     11.1
                              19...       1053      --      7.7      620      8.4      9.2     11.1
                              19...       1054      --      9.7      619      8.4      9.2     11.0
                              19...       1055      --     12.3      619      8.4      8.8     10.7
                              19...       1056      --     12.9      620      8.4      8.6     10.5
                            AUG
                              03...       1130    49.2       .00     611      8.3     21.4      8.4
                              03...       1131      --      3.0      615      8.3     21.0      8.3
                              03...       1132      --      5.9      609      8.3     20.9      8.1
                              03...       1133      --      8.8      610      8.2     20.8      8.1
                              03...       1134      --     11.9      609      8.1     18.8      6.9
                              03...       1135      --     15.0      632      8.0     18.1      6.3
                            SEP
                              15...       1130    47.9       .00     571      8.2     16.4      8.7
                              15...       1131      --      2.8      574      8.2     16.2      8.6
                              15...       1132      --      4.9      577      8.2     16.1      8.5
                              15...       1133      --      7.5      572      8.2     16.1      8.4
                              15...       1134      --     10.0      564      8.2     16.1      8.4
                              15...       1135      --     12.4      571      8.2     16.0      8.3
                              15...       1136      --     14.6      573      8.2     15.8      8.3


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       105      712      2.20    114      -6.0      125     10
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              19...       108      722       --      67.0    14.5      180     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       101      717       --     148      26.0       45     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        95      717       --      49.0    15.0      165     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475301102220100 LAKE SAKAKAWEA, VAN HOOK ARM 7

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                DEPTH    DEPTH     PH       SPE-
                                TO TOP  TO BOT-   WATER    CIFIC    HARD-             MAGNE-   POTAS-   SODIUM
                                  OF    TOM OF    WHOLE     CON-    NESS    CALCIUM    SIUM,    SIUM,     AD-
                                SAMPLE   SAMPLE    LAB     DUCT-    TOTAL    DIS-      DIS-     DIS-    SORP-
                                INTER-   INTER-  (STAND-   ANCE     (MG/L    SOLVED   SOLVED   SOLVED    TION
              DATE      TIME   VAL(IN   VAL(IN     ARD      LAB      AS      (MG/L    (MG/L    (MG/L    RATIO    SODIUM
                               METERS)  METERS)   UNITS)  (US/CM)   CACO3)   AS CA)   AS MG)   AS K)            PERCENT
                               (82047)  (82048)  (00403)  (90095)  (00900)  (00915)  (00925)  (00935)  (00931)  (00932)

          FEB
            17...       1210      .5      1.0      7.6      615      200      49       19        4        1       34
            17...       1215    13.2     13.7      7.4      611      200      48       18        3        1       34
          MAY
            19...       1120      .0       --       --      611      210      51       20        3        1       34
            19...       1125    17.4       --       --      610      210      52       20        4        2       34
          AUG
            03...       1115      .0       --       --      617      200      49       20        4        2       36
            03...       1120    13.0       --       --      615      200      47       19        4        2       36
            03...       1125    20.2       --       --      623      210      49       20        4        2       36
          SEP
            15...       1125      .0       --      8.2      558      180      44       17        3        2       35
            15...       1130    17.5       --      8.2      563      190      46       18        4        2       35


                                 ANC                       NITRO-
                               UNFLTRD   CHLO-            GEN,AM-   NITRO-   NITRO-   NITRO-            PHOS-
                      SODIUM,  TIT 4.5   RIDE,   SULFATE  MONIA +    GEN,     GEN,     GEN,    NITRO-  PHORUS    PHOS-
                       DIS-      LAB     DIS-     DIS-    ORGANIC  AMMONIA  NO2+NO3  ORGANIC    GEN,     DIS-   PHORUS
                      SOLVED    (MG/L    SOLVED   SOLVED   TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    SOLVED   TOTAL
              DATE     (MG/L     AS      (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L
                       AS NA)   CACO3)   AS CL)  AS SO4)   AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)
                      (00930)  (90410)  (00940)  (00945)  (00625)  (00610)  (00630)  (00605)  (00600)  (00666)  (00665)

          FEB
            17...       48       160      8.4      150      .09      .02      .04       .07     .13     <.01      .07
            17...       48       160      8.4      140      .16      .03      .03       .13     .19      .01      .10
          MAY
            19...       50       160      8.7      150      .18     <.01      .04       --      .22     <.01      .03
            19...       52       160      8.7      150      .21     <.01      .07       --      .28     <.01      .04
          AUG
            03...       53       160      8.5      160      .14     <.01      .04       --      .18     <.01     <.02
            03...       52       160      8.4      160      .20     <.01      .06       --      .27     <.01     <.02
            03...       54       160      8.6      160      .22     <.01      .16       --      .38     <.01      .02
          SEP
            15...       46       130      7.5      140      .14     <.01      .11       --      .25     <.01     <.02
            15...       49       130      7.5      140      .16     <.01      .12       --      .28     <.01     <.02


                           SOLIDS,  CHLOR-A  CHLOR-B
                           SUM OF    PHYTO-   PHYTO-  ALUMI-                               BERYL-
                           CONSTI-   PLANK-   PLANK-    NUM,    ANTI-            BARIUM,    LIUM   BORON,   CADMIUM
                           TUENTS,    TON      TON     TOTAL    MONY,   ARSENIC   TOTAL    TOTAL    TOTAL    TOTAL
                             DIS-   CHROMO   CHROMO   RECOVER   TOTAL    TOTAL   RECOVER  RECOVER  RECOVER  RECOVER
                   DATE     SOLVED  FLUOROM  FLUOROM   -ABLE    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE    -ABLE
                            (MG/L)   (UG/L)   (UG/L)   (UG/L)   AS SB)   AS AS)   (UG/L)   (UG/L)   (UG/L)   (UG/L)
                           (70301)  (70953)  (70954)  (01104)  (01097)  (01002)  (01009)  (00998)  (00999)  (01113)

               FEB
                 17...       369     <3.0     <1.0      <50      <1        3       59       <1       150      <1
                 17...       367       --       --      <50      <1        3       58       <1       150      <1
               MAY
                 19...       385     <3.0     <1.0      <50      <1        2       61       <1       140      <1
                 19...       387       --       --      <50      <1        2       62       <1       130      <1
               AUG
                 03...       382     <3.0     <1.0      <50      <1       <1       61       <1       140      <1
                 03...       382       --       --      <50      <2        2       60       <1       140      <1
                 03...       386       --       --      <50      <2       <1       62       <1       150      <1
               SEP
                 15...       338     <3.0     <1.0      <50      <1        3       49       <1       140      <1
                 15...       343       --       --      <50      <1        2       51       <1       140      <1

                                                                                                    THAL-
                            CHRO-             IRON,            MANGAN-                              LIUM,
                            MIUM,   COPPER,   TOTAL    LEAD,     ESE    NICKEL,   SELE-   SILVER,   TOTAL    ZINC,
                            TOTAL    TOTAL    RECOV-   TOTAL    TOTAL    TOTAL    NIUM,    TOTAL    RECOV-   TOTAL
                           RECOVER  RECOVER   ERABLE  RECOVER  RECOVER  RECOVER   TOTAL   RECOVER   ERABLE  RECOVER
                   DATE     -ABLE    -ABLE    (UG/L    -ABLE   - ABLE    -ABLE    (UG/L    -ABLE    (UG/L    -ABLE
                            (UG/L)   (UG/L)   AS FE)   (UG/L)   (UG/L)   (UG/L)   AS SE)   (UG/L)   AS TL)   (UG/L)
                           (01118)  (01119)  (01045)  (01114)  (01123)  (01074)  (01147)  (01079)  (01128)  (01094)

               FEB
                 17...       <1        2        <7      <1        <2       3        1       <1       <1        8
                 17...       <1        2        <7      <1        <2       3       <1       <1       <1       10
               MAY
                 19...       <1        3        48      <1        <2       3       <1       <1       <1        5
                 19...       <1        3        39      <1        <2       3       <1       <1       <1        6
               AUG
                 03...       <1        2        <7      <1        <2       2       <1       <1       <1       10
                 03...       <1        1        <7      <1        <2       2        1       <1       <1        7
                 03...       <1        1        <7      <1        <2       4       <1       <1       <1       10
               SEP
                 15...       <1        1       <10      <1       <10       2       <1       <1       <1        8
                 15...       <1        2       <10      <1       <10       2       <1       <1       <1        6


                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       1200    44.9       .50     593      7.5       .3     14.1
                              17...       1201      --      2.7      596      7.7       .4     13.9
                              17...       1202      --      5.3      600      7.8       .3     13.7
                              17...       1203      --      7.7      596      7.9       .6     13.2
                              17...       1204      --      9.8      585      7.9       .8     13.0
                              17...       1205      --     13.1      600      7.9      1.3     12.3
                              17...       1206      --     13.7      600      7.9      1.4     12.2
                            MAY
                              19...       1110    57.1       .00     614      8.5     10.1     11.5
                              19...       1111      --      2.8      618      8.5      9.0     11.3
                              19...       1112      --      5.3      617      8.4      8.9     11.1
                              19...       1113      --      7.8      617      8.4      8.8     11.0
                              19...       1114      --     10.0      618      8.4      8.6     10.7
                              19...       1115      --     12.3      620      8.4      8.2     10.4
                              19...       1116      --     14.4      620      8.3      8.1     10.2
                              19...       1117      --     16.8      619      8.3      7.9     10.2
                              19...       1118      --     17.4      620      8.3      7.8      9.9
                            AUG
                              03...       1105    66.3       .00     608      8.3     21.6      8.3
                              03...       1106      --      2.9      611      8.3     21.1      8.3
                              03...       1107      --      6.0      616      8.3     20.9      8.1
                              03...       1108      --      9.1      609      8.2     20.7      7.9
                              03...       1109      --     12.0      613      8.2     20.0      7.3
                              03...       1110      --     15.1      615      7.9     17.0      5.4
                              03...       1111      --     17.8      616      7.8     16.3      5.5
                              03...       1112      --     20.2      624      7.7     15.3      4.9
                            SEP
                              15...       1115    57.4       .00     566      8.2     16.4      8.5
                              15...       1116      --      2.3      570      8.2     16.2      8.3
                              15...       1117      --      4.8      579      8.2     16.2      8.2
                              15...       1118      --      7.4      579      8.2     16.2      8.2
                              15...       1119      --     10.1      566      8.2     16.2      8.2
                              15...       1120      --     12.5      575      8.2     16.2      8.1
                              15...       1121      --     14.8      570      8.2     16.2      8.1
                              15...       1122      --     17.5      588      8.2     16.2      8.1

                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       104      712      1.64     79.0    -7.0      125      7.0
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              19...       107      723       --      67.0    17.5      180     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       101      717       --     166      22.5       45     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        92      717       --      44.0    14.0      135     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475303102233200 LAKE SAKAKAWEA, VAN HOOK ARM 8

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       1110    27.2       .50     592      7.6       .3     13.9
                              17...       1111      --      2.7      590      7.8       .3     13.8
                              17...       1112      --      5.6      586      7.9       .6     13.4
                              17...       1113      --      8.1      590      7.9       .8     13.2
                              17...       1114      --      8.3      591      7.9       .8     13.2
                            MAY
                              19...       1130    34.8       .00     615      8.5     10.2     11.7
                              19...       1131      --      2.6      617      8.5      9.6     11.6
                              19...       1132      --      5.4      619      8.4      9.1     11.1
                              19...       1133      --      7.8      620      8.4      8.7     10.7
                              19...       1134      --      9.8      619      8.4      8.5     10.5
                              19...       1135      --     10.6      622      8.4      8.5     10.4
                            AUG
                              03...       1055    36.1       .00     615      8.3     21.5      8.3
                              03...       1056      --      3.0      610      8.3     21.2      8.2
                              03...       1057      --      6.1      614      8.3     21.2      8.1
                              03...       1058      --      9.0      622      8.3     21.1      8.1
                              03...       1059      --     11.0      610      8.2     20.9      7.6
                            SEP
                              15...       1100    30.5       .00     570      8.2     16.3      8.6
                              15...       1101      --      2.1      571      8.2     16.2      8.5
                              15...       1102      --      4.0      571      8.2     16.1      8.4
                              15...       1103      --      5.9      570      8.2     16.1      8.4
                              15...       1104      --      8.1      570      8.2     16.1      8.4
                              15...       1105      --      9.3      570      8.2     16.1      8.3


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       103      712      1.70     87.0    -6.0      150      5.0
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              19...       110      723       --      55.0    19.0      180     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       100      717       --     107      20.5       45     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        93      717       --      47.0    13.0      130     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475054102213300 LAKE SAKAKAWEA, VAN HOOK ARM 9

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       0940    75.4       .60     607      7.7       .8     13.8
                              17...       0941      --      2.6      585      7.8       .5     13.8
                              17...       0942      --      5.7      591      7.9       .4     13.5
                              17...       0943      --      9.4      583      7.9      1.0     13.0
                              17...       0944      --     13.1      590      7.8      1.4     12.4
                              17...       0945      --     17.0      590      7.8      1.9     11.4
                              17...       0946      --     19.7      592      7.7      2.3     10.1
                              17...       0947      --     23.0      622       --      3.3      5.6
                            MAY
                              19...       1145    79.5       .00     617      8.5      9.2     11.4
                              19...       1146      --      3.0      619      8.4      8.7     11.2
                              19...       1147      --      6.0      619      8.4      8.6     11.1
                              19...       1148      --      8.9      616      8.4      8.4     10.9
                              19...       1149      --     11.6      618      8.4      8.3     10.8
                              19...       1150      --     15.0      618      8.4      8.2     10.6
                              19...       1151      --     18.1      617      8.3      7.9     10.5
                              19...       1152      --     20.9      615      8.3      7.9     10.3
                              19...       1153      --     24.2      607      8.3      7.8     10.2
                            AUG
                              03...       1030    85.0       .00     595      8.3     21.7      8.4
                              03...       1031      --      3.0      596      8.4     21.6      8.4
                              03...       1032      --      5.9      597      8.3     21.5      8.2
                              03...       1033      --      9.1      590      8.3     21.5      8.2
                              03...       1034      --     11.9      607      8.2     20.0      7.2
                              03...       1035      --     15.2      639      8.0     16.9      6.5
                              03...       1036      --     18.1      627      7.9     15.8      6.0
                              03...       1037      --     21.2      622      7.8     14.9      5.3
                              03...       1038      --     24.2      643      7.8     13.8      5.0
                              03...       1039      --     25.9      625      7.7     13.4      3.6
                            SEP
                              15...       1040    83.3       .00     569      8.2     16.2      8.2
                              15...       1041      --      2.9      571      8.2     16.2      8.1
                              15...       1042      --      5.8      572      8.2     16.2      8.1
                              15...       1043      --      8.9      572      8.2     16.2      8.1
                              15...       1044      --     12.0      572      8.2     16.2      8.1
                              15...       1045      --     15.1      572      8.2     16.2      8.0
                              15...       1046      --     18.2      572      8.2     16.2      8.0
                              15...       1047      --     20.9      572      8.2     16.2      8.0
                              15...       1048      --     24.0      574      8.1     16.2      7.8
                              15...       1049      --     25.4      574      8.1     16.2      7.8

                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       104      712      1.80     51.0    -7.0      130      8.0
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              19...       105      723       --      75.0    15.0      150     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       102      718       --     126      19.5      325     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        89      718       --      44.0    12.0      160     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475100102203300 LAKE SAKAKAWEA, VAN HOOK ARM 10

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                DEPTH    DEPTH     PH       SPE-
                                TO TOP  TO BOT-   WATER    CIFIC    HARD-             MAGNE-   POTAS-   SODIUM
                                  OF    TOM OF    WHOLE     CON-    NESS    CALCIUM    SIUM,    SIUM,     AD-
                                SAMPLE   SAMPLE    LAB     DUCT-    TOTAL    DIS-      DIS-     DIS-    SORP-
                                INTER-   INTER-  (STAND-   ANCE     (MG/L    SOLVED   SOLVED   SOLVED    TION
              DATE      TIME   VAL(IN   VAL(IN     ARD      LAB      AS      (MG/L    (MG/L    (MG/L    RATIO    SODIUM
                               METERS)  METERS)   UNITS)  (US/CM)   CACO3)   AS CA)   AS MG)   AS K)            PERCENT
                               (82047)  (82048)  (00403)  (90095)  (00900)  (00915)  (00925)  (00935)  (00931)  (00932)

          FEB
            17...       1030      .6      1.1      7.6      616      190      48       18        3        1       34
            17...       1035    19.0     19.5      7.7      617      200      49       19        3        1       34
          MAY
            19...       1220      .0       --      8.0      603      210      51       20        4        2       34
            19...       1225    20.8       --      7.7      592      210      50       20        4        2       35
          AUG
            03...       1015      .0       --      7.4      573      190      47       19        3        2       35
            03...       1020    12.0       --      8.0      537      170      41       16        3        1       35
            03...       1025    16.8       --      7.1      542      180      44       17        3        1       35
          SEP
            15...       1030      .0       --      8.1      564      180      45       18        3        2       36
            15...       1035    17.5       --      8.1      560      180      45       18        3        2       35


                                 ANC                       NITRO-
                               UNFLTRD   CHLO-            GEN,AM-   NITRO-   NITRO-   NITRO-            PHOS-
                      SODIUM,  TIT 4.5   RIDE,   SULFATE  MONIA +    GEN,     GEN,     GEN,    NITRO-  PHORUS    PHOS-
                       DIS-      LAB     DIS-     DIS-    ORGANIC  AMMONIA  NO2+NO3  ORGANIC    GEN,     DIS-   PHORUS
                      SOLVED    (MG/L    SOLVED   SOLVED   TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    SOLVED   TOTAL
              DATE     (MG/L     AS      (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L
                       AS NA)   CACO3)   AS CL)  AS SO4)   AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)
                      (00930)  (90410)  (00940)  (00945)  (00625)  (00610)  (00630)  (00605)  (00600)  (00666)  (00665)

          FEB
            17...       47       160      8.4      150      .45      .03      .04       .42     .49      .05      .08
            17...       48       160      8.6      150      .14      .03      .08       .11     .22      .05      .13
          MAY
            19...       51       160      8.7      160      .21     <.01      .04       --      .25     <.01      .02
            19...       52       160      8.7      160      .24     <.01      .08       --      .32     <.01     <.02
          AUG
            03...       49       150      7.7      140      .18     <.01      .06       --      .24     <.01     <.02
            03...       42       140      7.4      130      .13     <.01      .07       --      .20     <.01     <.02
            03...       45       140      7.5      130      .12     <.01      .07       --      .19     <.01     <.02
          SEP
            15...       48       140      7.5      140      .34      .03      .24       .31     .58      .03      .19
            15...       48       130      7.5      140      .15     <.01      .12       --      .27      .01      .02


                           SOLIDS,  CHLOR-A  CHLOR-B
                           SUM OF    PHYTO-   PHYTO-  ALUMI-                               BERYL-
                           CONSTI-   PLANK-   PLANK-    NUM,    ANTI-            BARIUM,    LIUM   BORON,   CADMIUM
                           TUENTS,    TON      TON     TOTAL    MONY,   ARSENIC   TOTAL    TOTAL    TOTAL    TOTAL
                             DIS-   CHROMO   CHROMO   RECOVER   TOTAL    TOTAL   RECOVER  RECOVER  RECOVER  RECOVER
                   DATE     SOLVED  FLUOROM  FLUOROM   -ABLE    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE    -ABLE
                            (MG/L)   (UG/L)   (UG/L)   (UG/L)   AS SB)   AS AS)   (UG/L)   (UG/L)   (UG/L)   (UG/L)
                           (70301)  (70953)  (70954)  (01104)  (01097)  (01002)  (01009)  (00998)  (00999)  (01113)

               FEB
                 17...       367     <3.0     <1.0      <50      <1        3       56       <1       130      <1
                 17...       371       --       --      <50      <1        2       58       <1       150      <1
               MAY
                 19...       386     <3.0     <1.0      <50      <1        2       61       <1       140      <1
                 19...       382       --       --      <50      <1        2       57       <1       140      <1
               AUG
                 03...       355     <3.0     <1.0      <50      <1       <1       56       <1       130      <1
                 03...       322       --       --      <50      <2        2       54       <1       120      <1
                 03...       333       --       --      <50      <2       <1       54       <1       130      <1
               SEP
                 15...       342     <3.0     <1.0      <50      <1        2       50       <1       130      <1
                 15...       341       --       --      <50      <1        2       50       <1       140      <1

                                                                                                    THAL-
                            CHRO-             IRON,            MANGAN-                              LIUM,
                            MIUM,   COPPER,   TOTAL    LEAD,     ESE    NICKEL,   SELE-   SILVER,   TOTAL    ZINC,
                            TOTAL    TOTAL    RECOV-   TOTAL    TOTAL    TOTAL    NIUM,    TOTAL    RECOV-   TOTAL
                           RECOVER  RECOVER   ERABLE  RECOVER  RECOVER  RECOVER   TOTAL   RECOVER   ERABLE  RECOVER
                   DATE     -ABLE    -ABLE    (UG/L    -ABLE   - ABLE    -ABLE    (UG/L    -ABLE    (UG/L    -ABLE
                            (UG/L)   (UG/L)   AS FE)   (UG/L)   (UG/L)   (UG/L)   AS SE)   (UG/L)   AS TL)   (UG/L)
                           (01118)  (01119)  (01045)  (01114)  (01123)  (01074)  (01147)  (01079)  (01128)  (01094)

               FEB
                 17...       <1        2        <7      <1        <2       3       <1       <1       <1       12
                 17...       <1        2        <7      <1        <2       3       <1       <1       <1       10
               MAY
                 19...       <1        3        20      <1        <2       3       <1       <1       <1        6
                 19...       <1        3       290      <1        <2       3       <1       <1       <1        4
               AUG
                 03...       <1        1        <7      <1        <2       4       <1       <1       <1       10
                 03...       <1        1        <7      <1        <2       2       <1       <1       <1        9
                 03...       <1        1        <7      <1        <2       2       <1       <1       <1       10
               SEP
                 15...       <1        1       <10      <1       <10       2       <1       <1       <1        6
                 15...       <1        1       <10      <1       <10       3       <1       <1       <1       10


                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       1020    64.3       .60     589      7.8       .3     13.8
                              17...       1021      --      3.8      588      7.8       .3     13.8
                              17...       1022      --      7.7      599      7.9       .4     13.3
                              17...       1023      --     11.0      589      7.9      1.4     12.6
                              17...       1024      --     14.9      579      7.9      1.7     11.8
                              17...       1025      --     18.4      600      7.8      2.2     10.9
                              17...       1026      --     19.6      600      7.8      2.3     10.2
                            MAY
                              19...       1210    68.3       .00     613      8.5      9.4     11.5
                              19...       1211      --      3.1      620      8.5      8.8     11.4
                              19...       1212      --      6.4      619      8.4      8.7     11.1
                              19...       1213      --      9.6      623      8.4      8.6     10.9
                              19...       1214      --     13.1      611      8.3      8.2     10.6
                              19...       1215      --     16.1      612      8.4      7.7     10.8
                              19...       1216      --     19.0      612      8.3      7.5     10.6
                              19...       1217      --     20.8      908      8.3      7.4     10.3
                            AUG
                              03...       1005    55.1       .00     535      8.2     21.5      8.3
                              03...       1006      --      3.0      533      8.2     21.4      8.1
                              03...       1007      --      6.0      534      8.2     21.4      8.2
                              03...       1008      --      9.1      591      8.2     20.6      7.7
                              03...       1009      --     12.0      603      8.1     20.0      7.3
                              03...       1010      --     14.9      631      7.9     17.8      6.0
                              03...       1011      --     16.8      617      7.9     16.4      6.0
                            SEP
                              15...       1020    57.4       .00     574      8.2     16.2      8.3
                              15...       1021      --      2.3      579      8.2     16.2      8.2
                              15...       1022      --      4.9      574      8.2     16.2      8.1
                              15...       1023      --      7.5      579      8.2     16.1      8.1
                              15...       1024      --     10.0      569      8.2     16.2      8.1
                              15...       1025      --     12.4      570      8.2     16.2      8.0
                              15...       1026      --     15.0      578      8.2     16.2      8.0
                              15...       1027      --     17.5      564      8.2     16.2      8.0

                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       102      712      1.97    114      -8.0      125     12
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              19...       106      723       --      71.0    18.0      160     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       100      719       --      96.0    19.0      330     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        90      718       --      47.0    11.0      165     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

475054102193000 LAKE SAKAKAWEA, VAN HOOK ARM 11

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       1000    36.7       .60     590      7.7       .3     13.9
                              17...       1001      --      3.1      584      7.8       .4     13.6
                              17...       1002      --      5.1      590      7.9       .3     13.4
                              17...       1003      --      9.6      582      7.9       .6     13.1
                              17...       1004      --     11.2      583      7.9      1.0     12.7
                            MAY
                              19...       1225    40.0       .00     612      8.5     10.1     11.8
                              19...       1226      --      2.6      613      8.5      8.8     11.6
                              19...       1227      --      5.6      608      8.4      8.6     11.3
                              19...       1228      --      8.9      615      8.4      8.6     11.2
                              19...       1229      --     12.2      602      8.4      8.2     10.6
                            AUG
                              03...       0945    44.9       .00     550      8.2     21.2      8.5
                              03...       0946      --      2.9      557      8.2     21.2      8.3
                              03...       0947      --      5.8      604      8.2     20.8      8.2
                              03...       0948      --      9.0      613      8.2     20.5      8.1
                              03...       0949      --     12.0      621      8.2     20.0      7.6
                              03...       0950      --     13.7      628      8.1     18.5      6.6
                            SEP
                              15...       1005    41.7       .00     556      8.1     16.2      8.3
                              15...       1006      --      2.1      575      8.1     16.2      8.2
                              15...       1007      --      3.9      576      8.1     16.2      8.2
                              15...       1008      --      6.1      578      8.1     16.2      8.1
                              15...       1009      --      8.1      553      8.1     16.1      8.0
                              15...       1010      --     10.1      576      8.1     16.2      8.1
                              15...       1011      --     11.9      568      8.1     16.2      8.0
                              15...       1012      --     12.7      575      8.1     16.2      8.0


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       103      713      1.90    47.0     -8.0      130      9.0
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              19...       111      724       --     67.0     17.0      150     <5.0
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                              19...        --       --       --       --       --       --       --
                            AUG
                              03...       102      718       --     97.0     18.5      330     <5.0
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                              03...        --       --       --       --       --       --       --
                            SEP
                              15...        90      718       --     59.0     11.0      175     <5.0
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
                              15...        --       --       --       --       --       --       --
Go to Table of Contents

474335102113900 LAKE SAKAKAWEA, DEEPWATER BAY 1

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                                                              PH
                                                                    SPE-     WATER
                                                                    CIFIC    WHOLE
                                                  RESER-    SAM-    CON-     FIELD   TEMPER-  OXYGEN,
                                                   VOIR    PLING    DUCT-   (STAND-   ATURE     DIS-
                                DATE      TIME    DEPTH    DEPTH    ANCE      ARD     WATER    SOLVED
                                                  (FEET)    (M)    (US/CM)   UNITS)  (DEG C)   (MG/L)
                                                 (72025)  (00098)  (00095)  (00400)  (00010)  (00300)

                            FEB
                              17...       1618    44.6       .65     410      7.7       .1     13.9
                              17...       1619      --      2.1      586      7.8       .4     13.4
                              17...       1620      --      4.3      587      7.9       .4     13.2
                              17...       1621      --      6.7      584      8.0       .5     13.1
                              17...       1622      --      9.3      595      8.0       .5     13.0
                              17...       1623      --     11.9      593      8.0       .6     12.9
                              17...       1624      --     13.6      600      8.0       .8     12.8
                            MAY
                              18...       1125    25.6       .00     633      7.7      9.8     11.3
                              18...       1126      --      2.4      633      8.2      9.7     11.3
                              18...       1127      --      4.5      633      8.2      9.7     11.3
                              18...       1128      --      6.5      632      8.2      9.7     11.2
                              18...       1129      --      7.8      636      8.2      9.7     11.1
                            AUG
                              02...       1150    31.8       .00     643      8.1     20.7      7.9
                              02...       1151      --      1.9      642      8.1     20.5      7.9
                              02...       1152      --      4.0      641      8.1     20.3      7.9
                              02...       1153      --      6.1      640      8.1     20.2      7.9
                              02...       1154      --      8.1      638      8.1     18.9      7.2
                              02...       1155      --      9.7      638      8.0     18.5      6.8
                            SEP
                              14...       1025    32.8       .00     590      7.8     15.8      9.1
                              14...       1026      --      2.2      591      8.0     15.8      9.0
                              14...       1027      --      4.1      591      8.1     15.8      8.9
                              14...       1028      --      6.2      592      8.1     15.8      8.9
                              14...       1029      --      8.2      592      8.2     15.8      8.9
                              14...       1030      --      9.9      592      8.2     15.8      8.8


                                        OXYGEN,   BARO-                               WIND
                                          DIS-    METRIC            TRANS-            DIREC-
                                         SOLVED   PRES-              PAR-              TION    WIND
                                         (PER-     SURE   ICE        ENCY   TEMPER-   (DEG.    SPEED
                                          CENT     (MM    THICK-   (SECCHI   ATURE     FROM    (MILES
                                DATE     SATUR-     OF    NESS      DISK)     AIR      TRUE     PER
                                         ATION)    HG)    (FEET)     (IN)   (DEG C)   NORTH)   HOUR)
                                        (00301)  (00025)  (82130)  (00077)  (00020)  (00036)  (00035)

                            FEB
                              17...       102      711      2.13    134      -6.0      100      7.0
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                              17...        --       --       --       --       --       --       --
                            MAY
                              18...       105      727       --      43.0    15.0      170     <5.0
                              18...        --       --       --       --       --       --       --
                              18...        --       --       --       --       --       --       --
                              18...        --       --       --       --       --       --       --
                              18...        --       --       --       --       --       --       --
                            AUG
                              02...        95      716       --     104      25.5       90     <5.0
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                              02...        --       --       --       --       --       --       --
                            SEP
                              14...        98      718       --      43.0    11.0      285      9.0
                              14...        --       --       --       --       --       --       --
                              14...        --       --       --       --       --       --       --
                              14...        --       --       --       --       --       --       --
                              14...        --       --       --       --       --       --       --
                              14...        --       --       --       --       --       --       --
Go to Table of Contents

474330102113800 LAKE SAKAKAWEA, DEEPWATER BAY 2

                                 WATER-QUALITY DATA, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999

                                DEPTH    DEPTH     PH       SPE-
                                TO TOP  TO BOT-   WATER    CIFIC    HARD-             MAGNE-   POTAS-   SODIUM
                                  OF    TOM OF    WHOLE     CON-    NESS    CALCIUM    SIUM,    SIUM,     AD-
                                SAMPLE   SAMPLE    LAB     DUCT-    TOTAL    DIS-      DIS-     DIS-    SORP-
                                INTER-   INTER-  (STAND-   ANCE     (MG/L    SOLVED   SOLVED   SOLVED    TION
              DATE      TIME   VAL(IN   VAL(IN     ARD      LAB      AS      (MG/L    (MG/L    (MG/L    RATIO    SODIUM
                               METERS)  METERS)   UNITS)  (US/CM)   CACO3)   AS CA)   AS MG)   AS K)            PERCENT
                               (82047)  (82048)  (00403)  (90095)  (00900)  (00915)  (00925)  (00935)  (00931)  (00932)

          FEB
            17...       1705      .6      1.1      7.7      615      200      49       19        4        1       34
            17...       1710    15.5     16.0      7.5      633      200      50       19        4        2       35
          MAY
            18...       1155      .0       --      7.9      619      210      52       20        4        1       33
            18...       1200    15.1       --      7.8      605      210      52       20        4        2       33
          AUG
            02...       1225      .0       --      7.6      644      210      50       21        4        2       36
            02...       1230    22.3       --      7.5      643      210      49       20        4        2       36
          SEP
            14...       1045      .0       --      8.3      572      190      46       18        4        2       36
            14...       1050    17.4       --      8.4      573      190      45       18        4        2       36


                                 ANC                       NITRO-
                               UNFLTRD   CHLO-            GEN,AM-   NITRO-   NITRO-   NITRO-            PHOS-
                      SODIUM,  TIT 4.5   RIDE,   SULFATE  MONIA +    GEN,     GEN,     GEN,    NITRO-  PHORUS    PHOS-
                       DIS-      LAB     DIS-     DIS-    ORGANIC  AMMONIA  NO2+NO3  ORGANIC    GEN,     DIS-   PHORUS
                      SOLVED    (MG/L    SOLVED   SOLVED   TOTAL    TOTAL    TOTAL    TOTAL    TOTAL    SOLVED   TOTAL
              DATE     (MG/L     AS      (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L    (MG/L
                       AS NA)   CACO3)   AS CL)  AS SO4)   AS N)    AS N)    AS N)    AS N)    AS N)    AS P)    AS P)
                      (00930)  (90410)  (00940)  (00945)  (00625)  (00610)  (00630)  (00605)  (00600)  (00666)  (00665)

          FEB
            17...       48       160      8.4      150      .12      .01      .04       .11     .16     <.01      .07
            17...       51       170      8.6      150      .24      .04      .06       .20     .30      .02      .08
          MAY
            18...       50       170      8.9      160      .24     <.01      .08       --      .32     <.01      .02
            18...       50       170      8.9      160      .20     <.01      .09       --      .29      .02      .04
          AUG
            02...       56       160      9.0      160      .17     <.01      .04       --      .21     <.01     <.02
            02...       55       160      9.0      160      .21     <.01      .11       --      .32     <.01     <.02
          SEP
            14...       50       140      7.8      150      .17     <.01      .07       --      .24      .02     <.02
            14...       49       140      7.8      150      .19     <.01      .08       --      .27      .02     <.02


                           SOLIDS,  CHLOR-A  CHLOR-B
                           SUM OF    PHYTO-   PHYTO-  ALUMI-                               BERYL-
                           CONSTI-   PLANK-   PLANK-    NUM,    ANTI-            BARIUM,    LIUM   BORON,   CADMIUM
                           TUENTS,    TON      TON     TOTAL    MONY,   ARSENIC   TOTAL    TOTAL    TOTAL    TOTAL
                             DIS-   CHROMO   CHROMO   RECOVER   TOTAL    TOTAL   RECOVER  RECOVER  RECOVER  RECOVER
                   DATE     SOLVED  FLUOROM  FLUOROM   -ABLE    (UG/L    (UG/L    -ABLE    -ABLE    -ABLE    -ABLE
                            (MG/L)   (UG/L)   (UG/L)   (UG/L)   AS SB)   AS AS)   (UG/L)   (UG/L)   (UG/L)   (UG/L)
                           (70301)  (70953)  (70954)  (01104)  (01097)  (01002)  (01009)  (00998)  (00999)  (01113)

               FEB
                 17...       370     <3.0     <1.0      <50      <1        3       57       <1       140      <1
                 17...       382       --       --      <50      <1        3       56       <1       150      <1
               MAY
                 18...       395       --       --       51      <1        2       61       <1       150      <1
                 18...       397       --       --       53      <1        2       60       <1       150      <1
               AUG
                 02...       403     <3.0     <1.0      <50      <2       <1       61       <1       140      <1
                 02...       397       --       --      <50      <1        2       59       <1       140      <1
               SEP
                 14...       356     <3.0     <1.0       97      <1        2       52       <1       140      <1
                 14...       353       --       --      160      <1        2       51       <1       150      <1


                                                                                                    THAL-
                            CHRO-             IRON,            MANGAN-                              LIUM,
                            MIUM,   COPPER,   TOTAL    LEAD,     ESE    NICKEL,   SELE-   SILVER,   TOTAL    ZINC,
                            TOTAL    TOTAL    RECOV-   TOTAL    TOTAL    TOT