HCDN: Streamflow Data Set, 1874 - 1988
By J.R. Slack, Alan M. Lumb, and Jurate Maciunas Landwehr
USGS Water-Resources Investigations Report 93-4076


Description, qualifying comments, and acceptable water years.

Drainage area is 119000 sq.mi.                          Datum is 477.41 ft.
Located in hydrologic unit 07080104 at Latitude: 40:23:37N  Longitude: 091:22:27W
Station is in the state of IA (county code 111) and serviced by the IA office.
Channel slope is N.A. feet/mile
Stream length is N.A. miles
Mean basin elevation is N.A. feet above National Geodetic Vertical Datum
Percent of contributing drainage area covered by 
   Storage: N.A.%     Lakes: N.A.%        Forests: N.A.%      Glaciers: N.A.%
Soil infiltration index is N.A. inches
Annual precipitation is N.A. inches
Precipitation intensity is N.A. inches/24 hour (expected on the average once each two years)
January minimum temperature is N.A. degrees Fahrenheit

This is a National Water Conditions station.
Comments and qualifications on the data:
   Prior to October 1932, discharges are from the reports of the Iowa State Planning Board. Since 1913, discharge is
   computed from records of the operation of turbines in powerplant and spillway gates in dam by Union Electric Power
   Company (formerly Mississippi River Power Company). Records for the period May 1913 to September 1937 are adjusted
   for change in contents in Keokuk Reservoir.  Those after September 1937 are unadjusted.  Minor flow regulation by
   powerplant since 1913, and by navigation dams since about 1939.

Daily and longer averages for 110 water years are acceptable (all years except partial years).
A water year with acceptable data is indicated by an asterisk in the time line, which spans 1874 through 1988.

                                                   Water year
1     1         1         1         1         1         1         1         1         1         1         1       1
8     8         8         9         9         9         9         9         9         9         9         9       9
7     8         9         0         1         2         3         4         5         6         7         8       8

The streamflow data Daily values, monthly mean values, and yearly mean values of streamflow data are available in tablular form. Select the desired option from the list below.

The data tables do not have column heading for ease of reading into statistical programs. For a detailed description of the format of the data tables, select the corresponding file from the list below.

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