05055200 BIG COULEE NEAR MADDOCK, ND

List Of Figures:

Annual mean discharge
Annual flow duration

LOCATION.--Lat 47°55'10'', long 99°34'47", on north line of sec.11, T.151 N., R.70 W., Benson County, Hydrologic Unit 09020202, at culvert on county highway, 3.5 mi southwest of Maddock.
DRAINAGE AREA.--146 mi2, of which about 49 mi2 is probably noncontributing.
PERIOD OF RECORD.--October 1956 to September 1967. Annual maximums, water years 1969-73.
GAGE.--Nonrecording gage. Prior to Oct. 20, 1964, water-stage recorder at site 3 mi upstream at different datum. June 22, 1965, to June 17, 1966, water-stage recorder and June 18, 1966, to Sept. 30, 1967, nonrecording gage, at present site and datum.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 810 ft3/s, Apr. 8, 1971; maximum gage height, 12.00 ft, Apr. 8, 1971; no flow during part of each year.

Annual mean discharge

Annual mean discharge for 05055200 Big Coulee near Maddock, North Dakota 
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                              Statistics of monthly and annual mean discharges
                                    [m, more than 1 year of occurrence]
__________________________________________________________________________________________________________

                  Maximum                  Minimum                              Mean
           ______________________   ______________________   _____________________________________________

                       Water year               Water year              Standard    Coeffi-    Percentage
 Month     Discharge       of       Discharge       of       Discharge  deviation   cient of   of annual
            (ft3/s)    occurrence    (ft3/s)    occurrence    (ft3/s)     (ft3/s)   variation   discharge
__________________________________________________________________________________________________________

October      4.10      1966          0         m               0.380     1.23        3.26       1.16
November     0.914     1966          0         m               0.090     0.27        2.92       0.29
December     0.419     1966          0         m               0.040     0.13        3.32       0.12
January      0.085     1966          0         m               0.010     0.03        3.32       0.02
February     2.29      1958          0         m               0.210     0.69        3.32       0.64
March        69.6      1966          0.065     1964            14.7      22.2        1.52       45.1
April        28.0      1960          0.010     1957            7.73      9.42        1.22       23.8
May          12.3      1967          0         1959            2.96      3.72        1.26       9.09
June         14.1      1964          0         m               2.58      4.26        1.65       7.93
July         12.0      1963          0         m               2.67      4.03        1.51       8.22
August       4.21      1965          0         m               0.810     1.66        2.04       2.50
September    3.65      1965          0         m               0.390     1.09        2.82       1.19
Annual       7.74      1966          0.331     1959            2.73      2.50        0.92       100
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Annual flow duration

Annual flow duration for 05055200 Big Coulee near Maddock, North Dakota 
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                              Monthly and annual flow duration, in cubic feet per second
______________________________________________________________________________________________________________________

 Percentage
  of days
 discharge     Jan.  Feb.  March   April   May     June    July    Aug.    Sept.   Oct.    Nov.    Dec.   Annual
 equaled or
  exceeded
______________________________________________________________________________________________________________________

  95           0     0     0       0       0       0       0       0       0       0       0       0       0
  90           0     0     0       0       0       0       0       0       0       0       0       0       0
  85           0     0     0       0       0       0       0       0       0       0       0       0       0
  80           0     0     0       0       0       0       0       0       0       0       0       0       0
  75           0     0     0       0       0       0       0       0       0       0       0       0       0
  70           0     0     0       0.10    0.10    0.10    0       0       0       0       0       0       0
  65           0     0     0       0.19    0.10    0.18    0       0       0       0       0       0       0
  60           0     0     0       0.19    0.20    0.26    0       0       0       0       0       0       0
  55           0     0     0       0.45    0.29    0.39    0.10    0       0       0       0       0       0
  50           0     0     0.10    0.70    0.50    0.47    0.10    0       0       0       0       0       0
  45           0     0     0.16    1.70    0.60    0.57    0.23    0       0       0       0       0       0
  40           0     0     0.70    2.60    1.20    1.00    0.34    0       0       0       0       0       0
  35           0     0     0.89    3.20    1.70    1.20    0.52    0       0       0       0       0       0.05
  30           0     0     1.80    3.90    2.10    1.20    0.64    0.02    0       0       0       0       0.17
  25           0     0     4.15    6.28    3.00    1.50    0.96    0.12    0       0       0       0       0.31
  20           0     0     6.33    8.06    4.20    1.80    1.40    0.19    0       0       0       0       0.79
  15           0     0     15.9    12.3    6.13    2.70    2.70    0.50    0.09    0.03    0.10    0       1.50
  10           0     0     29.1    17.3    7.74    3.90    4.84    1.00    0.83    0.12    0.15    0       3.91
  5            0     0     113     33.0    12.9    9.00    12.5    5.15    1.90    2.50    0.82    0.35    8.72
______________________________________________________________________________________________________________________

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                            Probability of annual high discharges
                                  [ng, statistic not given]
__________________________________________________________________________________________________

                                                       Maximum average discharge
                                                               (ft3/s)
                                       ___________________________________________________________

             Recurrence     Maximum
Exceedance    interval   instantaneous  3-day period  7-day period  15-day period  30-day period
probability    (years)      (ft3/s)
__________________________________________________________________________________________________

  0.99         1.01         4.80        5.03          3.07          1.70           0.862
  0.95         1.05         15.1        11.1          6.86          3.84           1.96
  0.90         1.11         26.5        16.8          10.5          5.90           3.03
  0.80         1.25         50.5        27.4          17.3          9.89           5.10
  0.50         2            154         67.2          44.8          26.2           13.7
  0.20         5            404         158           113           67.9           36.3
  0.10         10           631         242           182           111            60.0
  0.04         25           976         378           300           186            102
  0.02         50           1,270       500           413           260            144
  0.01         100          1,580       640           549           350            195
  0.005        200          1,910       799           711           458            257
  0.002        500          2,360       ng            ng            ng             ng
__________________________________________________________________________________________________

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                          Probability of annual low discharges
				[ng, statistic not given]
____________________________________________________________________________________

                                    Minimum average discharge (ft3/s)
                    ________________________________________________________________

                                       Number of consecutive days
                    ________________________________________________________________

Non-       Recur-
exceed-    rence
ance       inter-   1      3      7      14     30     60     90     120    183
prob-       val
ability   (years)
____________________________________________________________________________________

0.05       20       ng     ng     ng     ng     ng     ng     ng     ng     0
0.10       10       ng     ng     ng     ng     ng     ng     ng     ng     0
0.20       5        ng     ng     ng     ng     ng     ng     ng     ng     0
0.50       2        ng     ng     ng     ng     ng     ng     ng     ng     0
____________________________________________________________________________________

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                        Probability of seasonal low discharges
                               [ng, statistic not given]
_____________________________________________________________________________________

                                        Minimum average discharge (ft3/s)
                            _________________________________________________________

                                           Number of consecutive days
                            _________________________________________________________

   Non-       Recurrence
exceedance     interval      1     7      14     30       1      7      14       30
probability    (years)
_____________________________________________________________________________________

                            December-January-February          March-April-May
                            _________________________     ___________________________

0.05           20           ng     ng     ng     ng       ng     ng     0        0
0.10           10           ng     ng     ng     ng       ng     ng     0        0
0.20           5            ng     ng     ng     ng       ng     ng     0        0.006
0.50           2            ng     ng     ng     ng       ng     ng     0.012    0.119

                                June-July-August          September-October-November
                            _________________________     ___________________________

0.05           20           ng     ng     ng     0        ng     ng      ng      ng
0.10           10           ng     ng     ng     0        ng     ng     ng       ng
0.20           5            ng     ng     ng     0        ng     ng     ng       ng
0.50           2            ng     ng     ng     0        ng     ng     ng       ng
_____________________________________________________________________________________

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           Annual peak discharge and corresponding gage height, period of record
_____________________________________________________________________________________

                        Gage     Peak                             Gage     Peak
Water    Date          height  discharge    Water    Date        height  discharge
year                   (feet)   (ft3/s)     year                 (feet)   (ft3/s)
_____________________________________________________________________________________

          Annual peak discharge, by year, and corresponding gage height

1957     March 21       1.95     33.0       1965    April 8        5.95     99.0
1958     February 25    2.05     21.0       1966    March 14       6.54     310
1959     March 13       2.10     42.0       1967    March 24       7.00     440
1960     March 27       2.50     262        1969    April 11       7.00     750
1961     March 15       2.15     145        1970    April 6        10.35    200
1962     March 26       2.27     209        1971    April 8        12.00    810
1963     July 27        1.94     104        1972    March          9.30     292
1964     June 18        2.45     159        1973    May 9          6.95     10.0

Annual peak discharge, from highest to lowest, and corresponding gage height

1971     April 8        12.00    810        1964    June 18        2.45     159
1969     April 11       7.00     750        1961    March 15       2.15     145
1967     March 24       7.00     440        1963    July 27        1.94     104
1966     March 14       6.54     310        1965    April 8        5.95     99.0
1972     March          9.30     292        1959    March 13       2.10     42.0
1960     March 27       2.50     262        1957    March 21       1.95     33.0
1962     March 26       2.27     209        1958    February 25    2.05     21.0
1970     April 6        10.35    200        1973    May 9          6.95     10.0
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                             Monthly and annual mean discharges, in cubic feet per second
                [Data were not rounded in accordance with U.S. Geological Survey publication standards]
__________________________________________________________________________________________________________________________________

Year     Oct.     Nov.     Dec.     Jan.     Feb.    March     April    May      June     July     Aug.     Sept.    Annual
__________________________________________________________________________________________________________________________________

 1957    0        0        0        0        0       2.67      0.010    0.348    0.203    0.206    0.271    0.483     0.355
 1958    0.006    0        0        0        2.29    1.65      1.98     0.271    0.267    3.31     0        0         0.804
 1959    0        0        0        0        0       3.88      0.013    0        0        0        0        0         0.331
 1960    0        0        0        0        0       21.7      28.0     4.40     1.62     0.097    0        0         4.65
 1961    0        0        0        0        0       4.17      0.160    0.074    0        0        0        0         0.374

 1962    0        0        0        0        0       14.0      4.76     4.02     1.56     0.129    0        0         2.06
 1963    0        0        0        0        0       0.155     0.383    1.15     0.473    12.0     4.13     0         1.55
 1964    0        0        0        0        0       0.065     17.3     1.36     14.1     1.69     0        0         2.84
 1965    0        0        0        0        0       1.49      17.9     2.43     1.07     8.84     4.21     3.65      3.30
 1966    4.10     0.914    0.419    0.085    0       69.6      5.17     6.19     2.55     1.87     0.310    0.127     7.74
 1967    0.055    0.119    0        0        0       41.9      9.35     12.3     6.55     1.27     0.032    0         6.04
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