LOCATION.--Lat 42°25'57", long 93°48'20"
referenced to North American Datum of 1927, in SW 1/4 NW 1/4 SE 1/4
sec.18, T.88 N., R.25 W., Hamilton County, IA, Hydrologic Unit
07100005, on left bank 50 ft upstream from bridge on State Highway
17, 2.5 mi south of Webster City, 3.2 mi downstream from Brewers
Creek, and 21.2 mi upstream from mouth. (map)
DRAINAGE AREA.--844 mi2.
SURFACE-WATER RECORDS
PERIOD OF RECORD.--Discharge records from March 1940 to current
year.
REVISED RECORDS.--WSP 1438: Drainage area. WSP 1308: 1940 (M). WSP
1708: 1956.
GAGE.--Water-stage recorder. Datum of gage is 989.57 ft above
National Geodetic Vertical Datum of 1929. Prior to June 26, 1940,
non-recording gage at same site and datum.
WATER-QUALITY RECORDS
PERIOD OF RECORD.--Water year 2012.
PERIOD OF DAILY RECORD.--
NITRATE + NITRITE: March 2012 to current year, records
fragmentary.
WATER TEMPERATURE: November 2011 to current year.