LOCATION.--Lat 42°37'46", long 92°32'36"
referenced to North American Datum of 1927, in SW 1/4 SW 1/4 SE 1/4
sec.6, T.90 N., R.14 W., Black Hawk County, IA, Hydrologic Unit
07080204, on left bank 100 ft downstream from bridge on County
Highway C55 in Finchford, 3.2 mi upstream from Shell Rock River, and
5.4 mi upstream from mouth. (map)
DRAINAGE AREA.--846 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from October 1945 to current
year. Prior to October 1955, published as "West Fork Shell Rock
River at Finchford".
REVISED RECORDS.--WSP 1438: Drainage area. WSP 1558: 1946 (M),
1947.
GAGE.--Water-stage recorder. Datum of gage is 867.54 ft above
National Geodetic Vertical Datum of 1929. Prior to June 10, 1955,
non-recording gage at same site and datum.
REMARKS.--An authorized diversion of 2,100 acre-ft is made into
Big Marsh, 16 mi upstream, each year between September 1 and November
15. Net effect on daily flows at gage is unknown.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water years 1988, 1996-1998, 2001-2004,
2011-2012. Period of record includes water-quality data published in
USGS annual reports and various project reports.
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