USGS Water-Year Summary 2020
05482315 Black Hawk Lake at Lake View, IA
LOCATION - Lat 42°18'15", long 95°02'30" referenced to North American Datum of 1927, in SW 1/4 SW 1/4 NE 1/4 sec.33, T.87 N., R.36 W., Sac County, IA, Hydrologic Unit 07100006, on south shore across from swimming beach in Lake View, and 2.0 mi upstream from lake outlet.
DRAINAGE AREA - 23.3 mi².
PERIOD OF RECORD - Stage-only records from April 1970 to September 1975, April 1978 to September 1992, October 1994 to current year.
GAGE - Water-stage recorder. Datum of gage is 1,213.50 ft above National Geodetic Vertical Datum of 1929 and 7.00 ft below crest of spillway of dam at outlet. Prior to June 25, 1970, non-recording gage at lake outlet. Prior to January 22, 2001, at datum 5.0 ft higher.