USGS Water-Year Summary 2021
05481000 Boone River near Webster City, IA
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.
DRAINAGE AREA - 844 mi².
- WSP 1438: Drainage area. WSP 1308: 1940(M). WSP 1708: 1956.
PERIOD OF RECORD - Discharge records from March 1940 to current year.
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.
EXTREMES OUTSIDE PERIOD OF RECORD - Since at least 1896, no flood outside the period of record exceeded the June 10, 1918, stage of about 19.1 ft, from high-water mark, from information by local resident, discharge 21,500 ft³/s. Flood of June 18, 1932, reached a stage of 16.0 ft, discharge 15,000 ft³/s.
PERIOD OF RECORD - Water year 2012.
PERIOD OF DAILY RECORD -
NITRATE + NITRITE: March 2012 to Oct. 2017
WATER TEMPERATURE: November 2011 to current year, records fragmentary.