LOCATION.--Lat 41°40'53", long 93°14'47" referenced to North American Datum of 1927, in NE 1/4 NE 1/4 SW 1/4 sec.1, T.79 N., R.21 W., Jasper County, IA, Hydrologic Unit 07080105, on left bank 15 ft downstream from bridge on State Highway 117, at northern edge of Colfax, 1.0 mi downstream from Sugar Creek, 2.8 mi upstream from Indian Creek, 95.1 mi upstream from confluence with the North Skunk River, and 189.8 mi upstream from mouth of Skunk River. (map)

DRAINAGE AREA.--803 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD.--Partial-record low-flow measurements, June 1974 to June 1977; discharge records from October 1985 to current year.

REVISED RECORDS.--WDR IA-01-1: 2000.

GAGE.--Water-stage recorder. Datum of gage is 770.00 ft above National Geodetic Vertical Datum of 1929.

WATER-QUALITY RECORDS

PERIOD OF RECORD.--Water years 1989-1993.

PERIOD OF DAILY RECORD.--
SPECIFIC CONDUCTANCE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1988 to December 1993, records fragmentary.
WATER TEMPERATURE: Daily instantaneous values collected in conjunction with suspended-sediment samples, October 1988 to December 1993, records fragmentary.
SUSPENDED-SEDIMENT CONCENTRATION AND DISCHARGE: October 1988 to December 1993.

Advanced Hydrologic Prediction Service

Iowa Department of Transportation

Cooperative Water Program