Youghiogheny River at Sutersville, PA

1998 Water-Year
Basic Fixed-Site Water-Quality Records
[drop]

                                             YOUGHIOGHENY RIVER BASIN

                                 03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA
                                   (National water-quality assessment station)

LOCATION.--Lat 40`14'24", long 79`48'24", Allegheny County, Hydrologic Unit 05020006, on left bank 500 ft upstream
   from highway bridge at Sutersville, 2.1 mi downstream from Sewickley Creek, at mile 15.2.

DRAINAGE AREA.--1,715 mi2.

                                             WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1920 to current year.  Monthly discharge only for some periods, published in WSP 1305.

REVISED RECORDS.--WSP 743:   Drainage area.  WSP 1305:   1924, 1926 (M), 1931 (M).  WSP 1435:   1935-36.

GAGE.--Water-stage recorder.  Datum of gage is 733.36 ft above sea level.  Prior to June 1, 1939, nonrecording
   gage at site 500 ft downstream at same datum.

REMARKS.--No estimated daily discharges.  Records good.  Flow regulated since 1925 by Deep Creek Reservoir, since
   1943 by Youghiogheny River Lake 58 mi upstream, and by several smaller reservoirs above station.  Several
   measurements of water temperature were made during the year.  U.S. Army Corps of Engineers satellite telemeter
   at station.


                   DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
                                               DAILY MEAN VALUES

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

  1      2010      871     8420     2930     3300    10700     2850     5200     2090     3490     1380     1030
  2      1680     1350     7150     2690     3200     9760     3870     4210     2470     5150     1230      974
  3      1460     3490     5330     3010     3020     8420     3240     4140     2260     3960     1170      888
  4      1260     2380     4590     3860     2970     7270     2890     4070     2450     2750     1130      793
  5      1150     1660     4210     4280     4300     7330     2810     5250     1750     2600     1110      811

  6      1080     1350     3770     3830     5440     6900     2600     7720     1480     2120     1090      995
  7      1020     6380     3400     4670     5900     6560     2360     7990     1380     1550     1070     1030
  8       984    17800     3130    13500     5120     6800     2270     6350     1380     1670     1040     1320
  9       975    15000     2950    16300     4660    11200     2930     6750     1160     2230     1030     1070
 10      1030     8870     2930    11500     3910    11900    16700     5900     1150     2560     1210      997

 11      1080     5640     6060     8100     3460     8880    14800     5180     1180     1820     1400      897
 12      1060     4030     6580     8160     3940     6970     9140     4010     1250     1520     1330      891
 13      1050     3230     5010     7180     6480     6000     6930     4090     1790     1380     1370     1020
 14      1040     3530     4150     6660     5890     5470     5950     3240     2830     1300     1230      962
 15      1070     5660     3590     6150     4990     4730     4710     2880     2810     1180     1250      779

 16      1050     4860     3200     6080     4380     3610     3530     2560     3590     1270     1150      767
 17      1020     3580     3120     5930     4250     2620     3150     2900     4630     1280     1390      760
 18       991     2900     2970     4720     7830     2720     2680     2760     5740     1260     1550      755
 19       954     2870     2770     4350    13800     3880     2830     2040     6520     1190     1400      783
 20       946     3100     2650     3220    11600     4400    10300     1840     8310     1130     1150      998

 21       875     3070     2580     2770    10400     5170     8830     1650     5920     1120     1120      976
 22       791     3510     2280     2580     8690     7870     8270     1480     3920     1150     1140     1140
 23       787     5560     2060     3010     7150     6440     6910     1430     3310     1150     1110      985
 24       795     4490     2520     5680     7540     5530     5920     1460     3810     1260     1160      962
 25       942     3190     3710     5710     6750     5020     4480     1420     2910     1330     1430      968

 26      1060     2980     4540     4710     6110     4530     3880     1440     2160     1290     1480      947
 27      1200     3070     4130     4140     6330     4220     5960     1410     1980     1190     1250     1040
 28      1130     3640     3780     3790     6960     3940     5850     1220     2230     1070     1080      981
 29      1040     7160     3450     3490      ---     3680     4750     1080     2020     1030     1040      818
 30       877     6350     3010     3710      ---     3420     4460     1110     1940     1240     1120      799
 31       811      ---     3100     3600      ---     2850      ---     1240      ---     1710     1440      ---

TOTAL   33218   141571   121140   170310   168370   188790   165850   104020    86420    54950    38050    28136
MEAN     1072     4719     3908     5494     6013     6090     5528     3355     2881     1773     1227      938
MAX      2010    17800     8420    16300    13800    11900    16700     7990     8310     5150     1550     1320
MIN       787      871     2060     2580     2970     2620     2270     1080     1150     1030     1030      755
>        -614     +703     +103     +237     +670     +353     +165      -66      +93     -475     -670     -596

   >  Change in contents, equivalent in cubic feet per second, in Deep Creek Reservoir and Youghiogheny River
         Lake.  Records of contents in Deep Creek Reservoir furnished by Pennsylvania Electric Co.  Records of
         contents in Youghiogheny River Lake furnished by U.S. Army Corps of Engineers.
  
  
                                             YOUGHIOGHENY RIVER BASIN

                            03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1921 - 1998 BY WATER YEAR (WY)  (SINCE REGULATION)

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

MEAN     1534     2155     3698     4024     4602     5968     4902     3694     2268     1588     1447     1363
MAX      7006     5818     9373     8488     9630    13720    10230     8012     7318     4853     5707     6382
(WY)     1955     1922     1973     1974     1939     1936     1940     1996     1941     1985     1956     1971
MIN       107      209      596      611      716     1539     1637     1012      585      614      309      185
(WY)     1924     1923     1954     1925     1934     1990     1921     1982     1925     1942     1922     1922

SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1921 - 1998

ANNUAL TOTAL                     1063308                    1300825
ANNUAL MEAN                         2913  >+3.5                3564  >-14                 3097
HIGHEST ANNUAL MEAN                                                                       4537              1996
LOWEST ANNUAL MEAN                                                                        1496              1925
HIGHEST DAILY MEAN                 25000     May 26           17800     Nov  8           79000       Mar 18 1936
LOWEST DAILY MEAN                    691     Jul  9             755     Sep 18              57       Sep 30 1922
ANNUAL SEVEN-DAY MINIMUM             778     Aug  6             829     Sep 14              64       Sep 24 1922
INSTANTANEOUS PEAK FLOW                                       22400     Apr 10          108000       Oct 16 1954
INSTANTANEOUS PEAK STAGE                                         13.13  Apr 10             a32.50    Oct 16 1954
INSTANTANEOUS LOW FLOW                                          749     Sep 18,19          b57       Sep 29 1922
ANNUAL RUNOFF (CFSM)                   1.70                       2.08                       1.81
ANNUAL RUNOFF (INCHES)                23.06                      28.22                      24.53
10 PERCENT EXCEEDS                  6040                       7150                       6860
50 PERCENT EXCEEDS                  2060                       2900                       1950
90 PERCENT EXCEEDS                   897                       1010                        697

   >  Change in contents, equivalent in cubic feet per second, in Deep Creek Reservoir and Youghiogheny River
         Lake.  Records of contents in Deep Creek Reservoir furnished by Pennsylvania Electric Co.  Records of
         contents in Youghiogheny River Lake furnished by U.S. Army Corps of Engineers.
   a  From floodmark.
   b  Minimum observed.

                                             MONONGAHELA RIVER BASIN

                            03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA--Continued
                                   (National Water-Quality Assessment station)

                                              WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1947 to September 1950, October 1958 to September 1959, October 1968 to September 1972,
  November 1975 to September 1981, April 1996 to September 1998 (discontinued).

PERIOD OF DAILY RECORD.--
   WATER TEMPERATURE:  October 1996 to September 1998.

INSTRUMENTATION.--Daily record measured and collected at hourly intervals with an in-situ probe and electronic
   data logger.  Water temperature was measured and collected at hourly intervals using an in-situ probe with an
   electronic data logger from October 1996 to September 1998.

REMARKS.--All water-quality samples were collected and analyzed by the U.S. Geological Survey.  Interruptions
   in the daily record were due to malfunctions of the equipment.  Water temperature data from the in-situ probes
   oftentimes did not exactly agree with the water temperature of the monthly and storm samples because of the
   fixed location of the in-situ temperature probes.  Additional sites in the (NAWQA) fixed-station network are
   shown in figure 6 on page 28.  An explanation of selected abbreviations used in the water-quality tables are
   given on pages 29-31.

EXTREMES FOR CURRENT YEAR.--
   WATER TEMPERATURE:  Maximum, 28.5`C, August 9,10; minimum 0.0`C,December 31, January 1,2.


                          WATER-QUALITY DATA, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                         DIS-              PH               BARO-
                       CHARGE,   SPE-     WATER             METRIC            HARD-             MAGNE-
                        INST.    CIFIC    WHOLE             PRES-             NESS    CALCIUM    SIUM,  SODIUM,
                        CUBIC    CON-     FIELD   TEMPER-    SURE   OXYGEN,   TOTAL    DIS-      DIS-    DIS-
                         FEET    DUCT-   (STAND-   ATURE     (MM      DIS-    (MG/L    SOLVED   SOLVED  SOLVED
      DATE      TIME     PER     ANCE      ARD     WATER      OF     SOLVED    AS      (MG/L    (MG/L    (MG/L
                        SECOND  (µS/CM)   UNITS)  (DEG C)    HG)     (MG/L)   CACO3)   AS CA)   AS MG)   AS NA)
                       (00061)  (00095)  (00400)  (00010)  (00025)  (00300)  (00900)  (00915)  (00925)  (00930)

  OCT
    07...       1000    1030      274      7.5     19.0      745      8.4       85     23        6.4     22
  NOV
    09...       0915   15600      152      7.1      8.0      733     10.0       46     13        3.1      6.0
  DEC
    19...       0825    2790      123      7.3      2.0      741     10.1       77     21        6.0     14
  JAN
    10...       0850   12300      180      7.4      7.5      722     11.4       52     15        3.8      9.3
    23...       0855    2400      291      7.5      3.5      736     13.0       91     25        7.2     18
  FEB
    06...       0920    5250      316      7.4      3.0      737     12.2       79     22        5.8     23
  MAR
    13...       0915    6080      204      7.1      1.0      749     14.3       61     16        4.8     11
  APR
    23...       1010    7240      163      7.0     10.0      747     10.9       51     14        3.9      8.4
  MAY
    13...       0930    4180      198      7.4     13.0      753      9.8       64     17        5.0     10
  JUN
    18...       1030    6120      188      6.9     19.0      752      8.9       63     18        4.6      8.7
  JUL
    16...       0930    1270      368      7.2     21.0      752      7.2      110     31        8.6     25
  AUG
    06...       0900    1100      304      7.1     24.5      756      7.1       87     24        6.8     22
  SEP
    03...       1000     940      281      7.6     22.0      747      7.8       81     22        6.1     20



                                             MONONGAHELA RIVER BASIN

                                 03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA.


                          WATER-QUALITY DATA, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                        ALKA-                                       SOLIDS,   NITRO-   NITRO-   NITRO-   NITRO-
               POTAS-  LINITY             CHLO-    FLUO-   SILICA,  RESIDUE    GEN,     GEN,     GEN,   GEN,AM-
                SIUM,  WAT DIS  SULFATE   RIDE,    RIDE,    DIS-    AT 180   NITRITE  NO2+NO3  AMMONIA  MONIA +
                DIS-   TOT IT    DIS-     DIS-      DIS-    SOLVED   DEG. C    DIS-     DIS-     DIS-   ORGANIC
               SOLVED   FIELD    SOLVED   SOLVED   SOLVED   (MG/L     DIS-    SOLVED   SOLVED   SOLVED   TOTAL
      DATE     (MG/L   MG/L AS   (MG/L    (MG/L    (MG/L     AS      SOLVED   (MG/L    (MG/L    (MG/L    (MG/L
               AS K)    CACO3   AS SO4)   AS CL)   AS F)    SIO2)    (MG/L)   AS N)    AS N)    AS N)    AS N)
              (00935)  (39086)  (00945)  (00940)  (00950)  (00955)  (70300)  (00613)  (00631)  (00608)  (00625)

  OCT
    07...      1.9        36      80      15        .13      .82      180     <.010     .482     .023     .23
  NOV
    09...      2.2        11      26       8.9     <.10     4.4        99     <.010    1.17     <.020     .64
  DEC
    19...      1.3        24      59      14       <.10     4.6       155     <.010    1.06     <.020     .12
  JAN
    10...      1.5        19      30      14       <.10     5.1       112     <.010    1.04     <.020     .32
    23...      1.4        25      68      21       <.10     5.1       176      .015    1.02     <.020     .10
  FEB
    06...      1.6        29      50      35        .11     5.1       174     <.010    1.01      .035     .31
  MAR
    13...      1.1        16      43      14       <.10     4.6       118     <.010     .921     .039    <.10
  APR
    23...      1.1        17      34      10       <.10     4.2        97     <.010     .787     .040     .18
  MAY
    13...      1.2        19      49      11       <.10     4.1       117     <.010     .714     .055     .14
  JUN
    18...      1.5        21      39      11       <.10     4.6       115     <.010     .853     .056     .89
  JUL
    16...      2.0        34      99      17        .14     2.3       258      .016     .834     .088     .17
  AUG
    06...      1.7        29      83      13        .14     1.8       186      .011     .718     .037     .22
  SEP
    03...      1.6        21      73      13       <.10     2.6       172      .016     .867     .064     .14




               NITRO-                     PHOS-                              CARBON,             SED.
              GEN,AM-            PHOS-   PHORUS             MANGA-  CARBON,  ORGANIC             SUSP.
              MONIA +   PHOS-   PHORUS    ORTHO,   IRON,    NESE,   ORGANIC   SUS-     SEDI-    SIEVE
              ORGANIC  PHORUS     DIS-    DIS-      DIS-     DIS-    DIS-    PENDED    MENT,     DIAM.
               DIS.     TOTAL    SOLVED  SOLVED    SOLVED   SOLVED  SOLVED    TOTAL    SUS-    % FINER
      DATE     (MG/L    (MG/L    (MG/L   (MG/L     (µG/L    (µG/L    (MG/L    (MG/L    PENDED    THAN
               AS N)    AS P)    AS P)   AS P)     AS FE)   AS MN)   AS C)    AS C)    (MG/L)  .062 MM
              (00623)  (00665)  (00666)  (00671)  (01046)  (01056)  (00681)  (00689)  (80154)  (70331)

  OCT
    07...      <.20     <.010    <.010    <.010     46       28       1.8       .20       7      80
  NOV
    09...       .25      .102    <.010     .011     53      110       3.8      1.0       81      78
  DEC
    19...       .13      .012     .017    <.010     81      138       1.4       .20       3      67
  JAN
    10...       .15      .042    <.010    <.010     27       61       2.3       .50      39      89
    23...      <.10     <.010    <.010     .016     45      167       1.1       .20       5      95
  FEB
    06...       .16      .013     .018     .010     16      105       1.4       .70     389      44
  MAR
    13...      <.10     <.010    <.010    <.010     41      144       1.2       .40       6      92
  APR
    23...      <.10     <.010    <.010    <.010     34       67       1.2       .50      10      59
  MAY
    13...       .11     <.010    <.010    <.010     33       56       1.1       .40       6      50
  JUN
    18...       .11      .150    <.010    <.010     29       25       1.8     >3.3       95      84
  JUL
    16...       .14     <.010    <.010     .019     51       38       1.7       .40       5      53
  AUG
    06...       .15     <.010    <.010    <.010     52       29       1.8       .50       8      56
  SEP
    03...       .13     <.010    <.010     .012     65       28       1.8       .20      14      52


                                             MONONGAHELA RIVER BASIN

                                 03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA.

REMARKS.--The following data are for dissolved trace elements in surface water filtered through a 0.45mm filter.


                          WATER-QUALITY DATA, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

                              DIS-
                            CHARGE,   ALUM-    ANTI-                      BERYL-            CHRO-
                             INST.    INUM,    MONY,   ARSENIC  BARIUM,   LIUM,   CADMIUM   MIUM,   COBALT,
                             CUBIC     DIS-     DIS-     DIS-    DIS-     DIS-      DIS-    DIS-     DIS-
                              FEET    SOLVED   SOLVED   SOLVED  SOLVED    SOLVED   SOLVED   SOLVED  SOLVED
           DATE      TIME     PER     (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L
                             SECOND   AS AL)   AS SB)   AS AS)   AS BA)   AS BE)   AS CD)   AS CR)   AS CO)
                            (00061)  (01106)  (01095)  (01000)  (01005)  (01010)  (01025)  (01030)  (01035)

       SEP
         03...       1000    940       17      <1.0       1        38     <1.0     <1.0     <1.0     <1.0




                                          MANGA-   MOLYB-            SELE-            URANIUM
                       COPPER,   LEAD,    NESE,    DENUM,  NICKEL,   NIUM,   SILVER,  NATURAL   ZINC,
                        DIS-      DIS-     DIS-     DIS-    DIS-      DIS-     DIS-     DIS-     DIS-
                        SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED   SOLVED
               DATE     (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L    (µG/L
                        AS CU)   AS PB)   AS MN)   AS MO)   AS NI)   AS SE)   AS AG)   AS U)    AS ZN)
                       (01040)  (01049)  (01056)  (01060)  (01065)  (01145)  (01075)  (22703)  (01090)

           SEP
             03...       1.1     <1.0      28      <1.0      1.4      <1      <1.0     <1.0      5.2



                                             MONONGAHELA RIVER BASIN

                                 03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA.


                  WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

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

                OCTOBER                 NOVEMBER                  DECEMBER                    JANUARY

   1     17.0    15.5    16.5      10.5     9.5    10.0       8.0     7.0     7.5        .0      .0      .0
   2     16.5    14.0    15.5      11.5    10.5    10.5       7.0     5.0     6.0       1.5      .0      .5
   3     15.5    14.0    15.0      10.5     9.5    10.0       5.0     4.5     4.5       4.0     1.5     2.5
   4     17.5    14.5    16.0       9.5     8.0     8.5       5.5     5.0     5.5       5.0     4.0     4.5
   5     19.5    17.0    18.0       8.0     7.0     7.5       5.5     5.0     5.5       5.5     4.0     5.0

   6     20.5    18.5    19.5       8.0     6.5     7.0       5.0     2.5     3.5       6.5     5.5     6.0
   7     21.0    19.0    20.0       8.0     7.5     8.0       2.5     2.0     2.0       8.0     6.5     7.0
   8     21.5    19.5    20.5       8.0     7.5     8.0       2.5     2.0     2.0       9.0     8.0     9.0
   9     21.5    19.5    20.5       8.5     7.5     8.0       3.0     2.0     2.5       9.5     8.5     9.0
  10     21.5    20.0    20.5       8.5     8.0     8.0       4.0     3.0     3.5       8.5     6.0     7.0

  11     20.0    18.0    19.0       8.0     7.5     7.5       4.5     4.0     4.5       6.0     4.5     5.5
  12     19.0    17.0    18.0       7.5     6.0     6.5       4.5     4.0     4.0       4.5     4.0     4.0
  13     19.5    17.0    18.0       6.0     5.0     5.5       4.0     3.5     3.5       4.5     4.0     4.5
  14     18.5    16.0    17.5       5.5     5.0     5.0       3.5     3.0     3.5       4.0     2.5     3.0
  15     16.5    14.5    15.5       5.0     5.0     5.0       3.0     2.5     2.5       3.5     2.5     3.0

  16     15.5    14.0    14.5       5.0     4.0     4.5       2.5     2.0     2.5       4.0     3.5     3.5
  17     14.5    12.5    13.5       4.0     3.0     3.5       2.5     2.0     2.0       4.0     4.0     4.0
  18     14.5    12.5    13.5       3.0     2.5     2.5       2.5     1.5     2.0       4.0     3.5     4.0
  19     15.0    13.0    14.0       3.0     2.5     3.0       3.0     2.0     2.5       3.5     3.0     3.5
  20     14.5    12.5    13.5       4.5     3.0     4.0       3.0     2.5     3.0       3.5     3.0     3.0

  21     13.0    12.0    12.5       6.0     4.5     5.0       3.5     3.0     3.0       3.0     2.5     2.5
  22     12.0     9.5    11.0       6.5     6.0     6.0       3.5     3.0     3.0       3.5     2.5     2.5
  23     10.0     8.5     9.5       6.5     6.0     6.5       4.5     3.5     4.0       4.0     3.0     3.5
  24      9.5     8.5     9.0       6.0     4.0     5.0       4.5     4.0     4.5       4.0     3.5     3.5
  25     10.0     9.5    10.0       4.0     3.0     3.5       5.0     4.5     5.0       3.5     3.0     3.0

  26     10.5    10.0    10.0       4.0     3.0     3.5       5.0     4.5     4.5       3.5     2.5     3.0
  27     10.5     9.5    10.5       5.0     4.0     4.5       4.5     3.5     4.0       3.5     3.0     3.5
  28      9.5     8.0     9.0       6.0     5.0     5.5       3.5     2.5     3.0       4.0     3.5     3.5
  29      9.5     7.5     8.5       7.0     6.0     6.5       2.5     2.0     2.0       4.5     3.5     4.0
  30     10.0     8.0     9.0       8.0     7.0     7.5       2.0     1.5     1.5       4.5     4.0     4.5
  31     10.5     8.5     9.5       ---     ---     ---       1.5      .0      .5       4.0     3.0     3.5

 MONTH   21.5     7.5    14.4      11.5     2.5     6.2       8.0      .0     3.5       9.5      .0     4.0

                                             MONONGAHELA RIVER BASIN

                                 03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA.


                  WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

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

               FEBRUARY                   MARCH                     APRIL                       MAY

   1      3.0     2.0     3.0       6.0     5.5     6.0      16.5    15.5    15.5      13.0    12.0    12.5
   2      3.5     2.5     3.0       6.0     5.5     6.0      15.5    13.5    14.0      12.5    11.5    12.0
   3      3.5     3.0     3.5       5.5     5.0     5.5      13.5    12.0    12.5      14.0    12.5    13.0
   4      3.0     2.0     2.5       5.0     4.5     4.5      12.0     9.5    10.5      15.5    13.5    14.5
   5      3.0     2.0     2.5       4.5     4.0     4.5      10.5     9.0    10.0      15.0    13.5    14.5

   6      4.0     3.0     3.5       5.5     3.5     4.5      11.0     8.5    10.0      15.0    13.0    14.0
   7      4.0     2.5     3.5       6.5     5.0     6.0      11.5     9.0    10.5      14.5    13.5    14.0
   8      4.0     2.5     3.5       7.0     6.0     6.5      12.0    10.5    11.0      14.0    13.5    13.5
   9      4.5     3.0     3.5       7.5     6.5     7.0      12.0    11.0    11.5      14.5    13.5    14.0
  10      5.0     3.5     4.0       7.0     5.0     6.0      11.5     9.5    10.5      14.5    13.5    14.0

  11      5.0     4.0     4.5       5.0     2.5     3.5       9.5     9.0     9.5      14.5    13.5    14.0
  12      5.5     5.0     5.0       2.5     1.5     2.0      10.5     8.5     9.5      14.5    13.5    14.0
  13      5.0     4.0     4.0       3.0     1.0     2.0      11.0     9.0    10.0      16.5    13.5    15.0
  14      4.0     3.5     3.5       4.5     2.5     3.5      12.0    10.5    11.0      18.5    15.5    17.0
  15      4.0     3.0     3.5       4.0     3.0     3.5      12.5    11.0    11.5      20.0    17.5    18.5

  16      4.0     3.0     3.5       5.0     3.0     4.0      13.5    12.0    12.5      20.5    18.5    19.5
  17      5.0     4.0     4.5       5.5     4.5     5.0      13.5    12.5    13.5      21.5    19.0    20.0
  18      5.5     4.5     5.0       6.0     5.0     5.5      13.0    11.5    12.0      21.5    18.0    20.0
  19      5.0     4.5     4.5       7.5     6.0     6.5      12.5    11.0    12.0      23.0    19.5    21.0
  20      5.0     5.0     5.0       8.0     7.0     7.5      11.0    10.5    10.5      24.0    20.5    22.0

  21      5.0     5.0     5.0       8.0     7.0     7.5      11.5     9.5    10.5      23.0    21.0    22.0
  22      5.5     4.5     5.0       7.0     5.0     6.0      11.0    10.0    10.5      22.0    19.0    20.5
  23      5.0     4.5     5.0       5.5     4.5     5.0      11.0    10.0    10.5      22.5    19.5    20.5
  24      4.5     4.0     4.5       5.5     4.5     5.0      12.5    10.0    11.0      20.5    18.5    19.5
  25      4.5     4.0     4.0       6.5     4.5     5.5      13.5    11.0    12.0      20.5    18.5    19.5

  26      5.0     4.0     4.5       9.5     6.5     8.0      13.5    12.0    12.5      20.5    18.5    19.5
  27      5.5     4.5     5.0      12.0     9.0    10.5      12.5    11.0    12.0      22.0    18.5    20.0
  28      6.0     5.5     5.5      13.5    11.5    12.5      13.0    11.0    12.0      23.0    19.5    21.0
  29      ---     ---     ---      14.5    13.0    13.5      13.5    11.0    12.5      25.0    21.0    22.5
  30      ---     ---     ---      15.5    13.5    14.5      13.0    12.5    12.5      26.0    22.5    24.0
  31      ---     ---     ---      16.5    14.0    15.0       ---     ---     ---      25.5    23.0    24.5

 MONTH    6.0     2.0     4.1      16.5     1.0     6.5      16.5     8.5    11.5      26.0    11.5    17.8

                                             MONONGAHELA RIVER BASIN

                                 03083500  YOUGHIOGHENY RIVER AT SUTERSVILLE, PA.


                  WATER TEMPERATURE, DEGREES CELSIUS, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998

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

                 JUNE                     JULY                     AUGUST                    SEPTEMBER

   1     23.5    22.0    22.5       ---     ---     ---      25.0    22.0    23.0      25.5    22.5    24.0
   2     22.5    20.5    21.5       ---     ---     ---      25.5    22.0    23.5      25.0    23.0    23.5
   3     21.0    20.0    20.5       ---     ---     ---      26.0    23.0    24.0      24.5    21.5    22.5
   4     20.5    18.5    19.5       ---     ---     ---      26.5    23.0    24.5      24.5    21.5    23.0
   5     19.0    17.0    18.0       ---     ---     ---      27.0    24.0    25.0      25.0    21.5    23.0

   6      ---     ---     ---       ---     ---     ---      27.5    24.0    25.5      25.0    22.0    23.5
   7      ---     ---     ---       ---     ---     ---      27.5    24.5    25.5      25.0    22.5    23.5
   8      ---     ---     ---       ---     ---     ---      27.5    24.5    26.0      23.0    20.5    21.5
   9      ---     ---     ---       ---     ---     ---      28.5    25.5    26.5      20.5    18.0    19.0
  10      ---     ---     ---       ---     ---     ---      28.5    25.5    26.5      20.5    17.0    18.5

  11      ---     ---     ---       ---     ---     ---      25.5    23.5    24.5      21.5    18.5    19.5
  12      ---     ---     ---       ---     ---     ---      25.5    23.0    24.0      23.0    19.5    21.0
  13      ---     ---     ---       ---     ---     ---      26.0    23.0    24.5      24.0    21.0    22.0
  14      ---     ---     ---       ---     ---     ---      26.0    23.5    24.5      24.5    22.0    23.0
  15      ---     ---     ---       ---     ---     ---      25.0    22.5    23.5      25.5    23.0    24.0

  16      ---     ---     ---       ---     ---     ---      26.5    24.0    25.0      25.5    23.5    24.0
  17      ---     ---     ---      25.0    22.5    23.5      26.0    23.5    24.5      25.0    23.5    24.0
  18      ---     ---     ---      26.5    23.0    24.0      25.0    23.0    24.0      25.5    22.5    23.5
  19      ---     ---     ---      27.0    23.5    25.0      25.0    22.0    23.5      25.0    23.0    24.0
  20      ---     ---     ---      26.5    24.5    25.5      24.5    21.0    22.5      25.0    23.0    24.0

  21      ---     ---     ---      27.0    24.0    25.0      24.5    22.0    23.0      25.0    23.5    24.0
  22      ---     ---     ---      27.5    25.0    26.0      25.5    23.0    24.0      24.5    22.5    23.0
  23      ---     ---     ---      27.0    25.0    25.5      27.0    24.0    25.0      23.5    20.0    21.5
  24      ---     ---     ---      26.0    24.0    25.0      26.5    23.5    25.0      21.5    18.5    19.5
  25      ---     ---     ---      25.5    23.0    24.0      23.5    22.5    22.5      20.5    19.0    19.5

  26      ---     ---     ---      26.0    23.0    24.5      25.0    22.0    23.0      22.5    19.0    20.0
  27      ---     ---     ---      26.0    23.0    24.5      26.0    23.0    24.0      23.5    21.0    22.0
  28      ---     ---     ---      26.0    23.5    24.5      27.0    23.5    25.0      23.5    22.0    22.5
  29      ---     ---     ---      26.0    23.5    24.5      26.5    24.0    25.0      23.0    20.5    21.5
  30      ---     ---     ---      26.0    23.5    24.5      25.5    23.0    24.0      23.0    20.5    21.5
  31      ---     ---     ---      24.0    21.5    22.5      25.5    23.0    24.0       ---     ---     ---

 MONTH   23.5    17.0    20.4      27.5    21.5    24.6      28.5    21.0    24.4      25.5    17.0    22.2






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