LOCATION.--Lat 41°28'11", long 91°42'52" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 SW 1/4 sec.18, T.77 N., R.7 W., Washington County, IA, Hydrologic Unit 07080209, on right bank 30 ft upstream from bridge on State Highway 1, 0.8 mi south of Kalona, 1.1 mi upstream from Camp Creek, 4.5 mi downstream from Smith Creek, and 17.0 mi upstream from mouth. (map)

DRAINAGE AREA.--574 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Discharge records from September 1939 to current year.

REVISED RECORDS.--WSP 1438: Drainage area. WSP 1558: 1940 (M), 1941. WSP 1708: 1956, 1957 (P), 1958 (P).

GAGE.--Water-stage recorder. Datum of gage is 633.45 ft above National Geodetic Vertical Datum of 1929 (levels by U.S. Army Corps of Engineers). Prior to December 27, 1939, non-recording gage at site 30 ft downstream at same datum.

Advanced Hydrologic Prediction Service

U.S. Army Corps of Engineers - Rock Island District

National Streamflow Information Program