Monongahela River at Braddock, PA

1996 Water-Year
Basic Fixed-Site Water-Quality Records
[drop]

--------
                                             MONONGAHELA RIVER BASIN

                                   03085000  MONONGAHELA RIVER AT BRADDOCK, PA
                                   (National water-quality assessment station)

LOCATION.--Lat 40`23'28", long 79`51'30", Allegheny County, Hydrologic Unit 05020005, near right bank on river
   guide wall 300 ft upstream from dam at lock 2 at Braddock, 1,700 ft downstream from Turtle Creek, and 11.2 mi
   upstream of confluence with Allegheny River.

DRAINAGE AREA.--7,337 mi2.

                                             WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1938 to current year.  Monthly discharge only for some periods, published in WSP 1305.

GAGE.--Water-stage recorder and fixed-crest concrete dam control with streamward lock chamber usable as floodway
   during high flow since 1951.  Datum of gage is 709.66 ft above sea level (U.S. Army Corps of Engineers bench
   mark).  Prior to Aug. 13, 1951, at site 700 ft upstream, and Aug. 13, 1951 to Nov. 8, 1990 at present site at
   datum 2.50 ft lower.

REMARKS.--No estimated daily discharges.  Records good.  Flow regulated by locks and hydroelectric plants, since
   1938 by Tygart Lake, since 1926 by Lake Lynn, since 1925 by Deep Creek Reservoir, and since 1943 by
   Youghiogheny River Lake, combined capacity, 704,300 acre-ft.  Figures of daily discharge include slight
   diversion from Beaver Run Reservoir in the Kiskiminetas River Basin to the borough of Jeannette in the
   Monongahela River Basin.  U.S. Army Corps of Engineers satellite telemeter at station.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 18, 1936 reached a stage of 38.8 ft from, floodmarks, discharge,
   210,000 ft3/s.

                  DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
                                               DAILY MEAN VALUES

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

  1      1780     3360    14700     4890    27400    37900    20600    18500    32000     3260    63800     3300
  2      1500     4230    11500     7240    24100    30600    28200    20800    23400     5070    36400     2780
  3      1850     3070    12500    25000    18900    26300    26500    21500    15400     6040    29300     3120
  4      3020     3320     9450    31700    15900    23900    20900    18600     9390     6510    25200     3000
  5      3260     2440    10600    26800    14800    21400    22800    32300     8270     8090    21900     3730

  6      2990     2440     9920    21600    12900    34000    19200    65700     5990     6950    20100     5950
  7      2360     3190     8720    13600    11500    48200    15500    61000     6960     6090    16400    22500
  8      2120     3950     9210     7860    11600    47700    15300    48400     6100     4400    13900    27800
  9      2210     3980     8060     9090    33500    43000    15600    58100     5890     4790    13900    15700
 10      2300     4830     5610     8750    45700    35400    13300    64300     5640     5530    11500     9110

 11      1910     5740     4490     8390    35000    24500    12500    50800     6900     5710    10400    13800
 12      1940     5790     4570     7270    34800    22600    11000    64700     6120     4670     9030    12300
 13      1700     8650     4600     8710    31500    20200     8520    61800     9130     4120    19000    11700
 14      2260     9820     4820     7200    25100    16500     9130    47500     8290     3080    27900     9590
 15      4270    10700     6070     7420    19800    17700     9500    39900     6770     3140    24900     8870

 16      3870     9760    11200     8850    15900    31300    15400    36800     6860     4390    18400     7050
 17      3810     9200    22000    12100    14500    26400    23800    59600     5080     3470    11900    33400
 18      2680     8730    16000    44600    13400    22900    26500    73300     5870     6040    11800    54200
 19      2840     8760    19900   100000     9350    22700    26900    46900    12900    38400     8630    33500
 20      2390     9410    38000   188000    12300    42800    25300    39200     9030    88100     6980    27200

 21      2430    10300    32400    63300    32100    45000    15700    35200     8840    43700     6380    20600
 22      2340    12900    27300    33600    29100    34000    15900    35900     7260    33000     4850    12000
 23      2990     9840    17200    32700    27400    26800    15000    36400     5310    39900     5160     9910
 24      2890     9570    15600    38600    28000    23800    12900    30000     6540    36300     5360     9720
 25      2380    10300    12100    56100    24900    24500    10600    24900    13100    25400     4700     8610

 26      2380     9870     8510    46400    21900    29600     9600    15100    11500    17900     5790     7780
 27      1990     9360     8000    39500    31100    27500     8090    12700     8330    15600     4960     6940
 28      1730    12200     6810    42800    75000    26900     6740    21700     6720     8300     3500     8190
 29      1740    19700     6890    35500    70600    29500    10300    30700     4250     6540     3930    20800
 30      2470    17500     5040    33800      ---    28000    13400    42000     4020     6690     3480    15900
 31      3960      ---     4170    32400      ---    24700      ---    35200      ---    24600     3880      ---

TOTAL   78360   242910   375940  1003770   768050   916300   484680  1249500   271860   475780   453330   429050
MEAN     2528     8097    12130    32380    26480    29560    16160    40310     9062    15350    14620    14300
MAX      4270    19700    38000   188000    75000    48200    28200    73300    32000    88100    63800    54200
MIN      1500     2440     4170     4890     9350    16500     6740    12700     4020     3080     3480     2780
CFSM      .34     1.10     1.65     4.41     3.61     4.03     2.20     5.49     1.24     2.09     1.99     1.95
IN.       .40     1.23     1.91     5.09     3.89     4.65     2.46     6.34     1.38     2.41     2.30     2.18


                                             MONONGAHELA RIVER BASIN

                              03085000  MONONGAHELA RIVER AT BRADDOCK, PA--Continued

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1939 - 1996, BY WATER YEAR (WY)

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

MEAN     5321     9278    15780    17300    20920    24040    18860    14220     9131     6342     5919     4729
MAX     23130    42130    37600    36150    43120    54500    39180    40310    30240    15620    23720    18290
(WY)     1980     1986     1973     1952     1956     1963     1940     1996     1981     1958     1956     1971
MIN      1200      971     2748     3389     6387     8042     6473     3352     2107     1765     1531     1005
(WY)     1954     1954     1954     1977     1954     1969     1971     1982     1965     1966     1957     1946

SUMMARY STATISTICS           FOR 1995 CALENDAR YEAR        FOR 1996 WATER YEAR           WATER YEARS 1939 - 1996

ANNUAL TOTAL                     3386880                    6749530
ANNUAL MEAN                         9279                      18440                      12600
HIGHEST ANNUAL MEAN                                                                      18440              1996
LOWEST ANNUAL MEAN                                                                        6946              1954
HIGHEST DAILY MEAN                 55700     May 15          188000     Jan 20          188000       Jan 20 1996
LOWEST DAILY MEAN                   1430     Sep  2            1500     Oct  2             703       Sep  3 1946a
ANNUAL SEVEN-DAY MINIMUM            1710     Sep  6            2060     Oct  8             839       Nov 17 1953
INSTANTANEOUS PEAK FLOW                                      210000     Jan 20          210000       Jan 20 1996
INSTANTANEOUS PEAK STAGE                                         29.07  Jan 20             b31.20    Jun  5 1941
ANNUAL RUNOFF (CFSM)                   1.26                       2.51                       1.72
ANNUAL RUNOFF (INCHES)                17.17                      34.22                      23.34
10 PERCENT EXCEEDS                 22300                      38800                      29300
50 PERCENT EXCEEDS                  6240                      12100                       7710
90 PERCENT EXCEEDS                  1930                       3260                       2250

   a  Also Sept. 4, 22, 1946.
   b  Maximum gage height, 31.39 ft, June 24, 1972 (backwater from Allegheny River).  Datum then in use.
                                             MONONGAHELA RIVER BASIN

                              03085000  MONONGAHELA RIVER AT BRADDOCK, PA--Continued

                                              WATER-QUALITY RECORDS

PERIOD OF RECORD.--October 1958 to September 1993 (discontinued). September 1994 to current year.
REMARKS.--All water-quality samples collected and analyzed by the U.S. Geological Survey.  Additional sites in the
  fixed-station network are shown in figure 4, page 26.

                          WATER-QUALITY DATA, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996

                       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)
DEC
  07...       1030     8400     265      6.1      4.5      739     12.0      81        23      5.7     14
JAN
  20...       1700   179000     153      5.8      2.5      --       --       47        14      3.0      5.9
APR
  22...       0830    15700     307      7.1     14.0      740     10.5     110        31      8.1     15
MAY
  28...       0900    21400     249      7.6     15.5      734      9.2      82        23      6.0     11
JUN
  11...       0930     6940     357      7.4     23.0      738     10.0     120        33      8.3     20
JUL
  18...       1000     4780     490      7.6     26.5      739      6.8     160        43     12       30
AUG
  13...       0915    18200     245      7.6     23.0      738      9.8      76        22      5.2     13
SEP
  12...       0900    12200     200      7.5     23.5      734      9.1      66        19      4.5      9.5

                      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)
DEC
  07...      1.5        20      63       15       <0.10    4.7      144      0.010    0.950    0.110    <0.20
JAN
  20...      1.7        --      27        9.2      0.10    4.0       90      0.030    1.10     0.140     0.80
APR
  22...      1.1        27      92       12        0.10    4.6      175      0.020    0.660    0.130     0.20
MAY
  28...      1.4        27      68        8.1      0.10    5.0      158      0.010    0.520    0.090     0.30
JUN
  11...      1.7        36      95       16        0.20    5.3      212      0.030    0.690    0.110     0.30
JUL
  18...      2.3        57     140       20        0.20    4.5      297      0.020    0.800    0.070     0.30
AUG
  13...      1.6        29      62        7.7     <0.10    4.7      146      0.020    0.540    0.050     0.30
SEP
  12...      1.3        38      55        7.1     <0.10    4.2      117      0.020    0.590    0.110     0.30

            NITRO-                     PHOS-                                       CARBON,             SED.
            GEN,AM-            PHOS-   PHORUS    ALUM-             MANGA-  CARBON,  ORGANIC             SUSP.
            MONIA +   PHOS-   PHORUS    ORTHO,   INUM,    IRON,    NESE,   ORGANIC   SUS-     SEDI-    SIEVE
            ORGANIC  PHORUS     DIS-    DIS-      DIS-     DIS-     DIS-    DIS-    PENDED    MENT,     DIAM.
             DIS.     TOTAL    SOLVED  SOLVED    SOLVED   SOLVED   SOLVED  SOLVED    TOTAL    SUS-    % FINER
    DATE     (MG/L    (MG/L    (MG/L   (MG/L     (µG/L    (µG/L    (µG/L    (MG/L    (MG/L    PENDED    THAN
             AS N)    AS P)    AS P)   AS P)     AS AL)   AS FE)   AS MN)   AS C)    AS C)    (MG/L)  .062 MM
            (00623)  (00665)  (00666)  (00671)  (01106)  (01046)  (01056)  (00681)  (00689)  (80154)  (70331)
DEC
  07...      <0.20     0.040    0.030   <0.010     40       41     140        --        --        --       --
JAN
  20...       0.40     0.040    0.050    0.070     --      170     410        --        --        --       --
APR
  22...       0.20    <0.010   <0.010   <0.010     --       37     190        1.3      0.30        7       81
MAY
  28...       0.20     0.030    0.010   <0.010     --       39     110        1.6      1.3        83       97
JUN
  11...       0.40     0.090    0.080   <0.010     --       47     110        1.8      0.50       12       98
JUL
  18...       0.20     0.040   <0.010    0.010     --       30       9.0      1.7      0.50       20       87
AUG
  13...      <0.20     0.020   <0.010    0.010     --       44      19        2.4      0.70       29       96
SEP
  12...       0.20    <0.010    0.020    0.010     --       45      71        1.9      0.50       13       94







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