LOCATION.--Lat 42°53'45", long 95°14'35" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 SW 1/4 sec.5, T.93 N., R.37 W., Buena Vista County, IA, Hydrologic Unit 10230003, on right bank 500 ft upstream from concrete dam, 1,300 ft upstream from bridge on County Highway M36 in Linn Grove, and 139.4 mi upstream from mouth. (map)

DRAINAGE AREA.--1,548 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from October 1972 to current year.

REVISED RECORDS.--WDR IA-80-1: 1978-79.

GAGE.--Water-stage recorder. Datum of gage is 1,223.60 ft above National Geodetic Vertical Datum of 1929. October 1, 1972, to November 17, 1999, water-stage recorder located 0.25 mi downstream below concrete dam at same datum.

Advanced Hydrologic Prediction Service

U.S. Army Corps of Engineers - Omaha District