LOCATION.-- Lat 38°07'53", long 87°56'32" (NAD of 1927), in SE1/4SE1/4 sec.35, T.4 S., R.14 W., Posey County, Hydrologic Unit 05120113, (NEW HARMONY, IN quadrangle), at bridge on State Highway 66 at New Harmony, at Indiana-Illinois state line, 2.3 mi downstream from Black River, and at mile 53.1.

DRAINAGE AREA.-- 29,234 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1938 to September 1947.

STAGE: August 1988 to current year.

SURFACE-WATER QUALITY

CHEMICAL: October 1974 to 1986, water year 1998 to current year. Data collected water years 1997 and 1998 were published in the Kentucky Water Resources Data reports, and are stored in the Indiana NWIS/QW data base.

SEDIMENT: Partial record station--October 1974 to 1985.

SPECIFIC CONDUCTANCE: October 1974 to September 1980.

WATER TEMPERATURE: October 1974 to September 1980.

GAGE.-- Water-stage recorder. Datum of gage is 353.20 ft above NGVD of 1929. (Furnished by National Weather Service). Prior to October 1992, erroneously published as 353.30 ft above NGVD of 1929.

REMARKS.-- For sediment analysis, water discharge obtained from station Wabash River at Mount Carmel, IL. (03377500).

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum gage height, 23.84 ft. May 26, 1943. Beginning August 1988, minimum gage height, 0.46 ft. Oct. 12, 1988.

SPECIFIC CONDUCTANCE: Maximum daily recorded, 805 microsiemens, Feb. 15, 1977; minimum daily recorded, 200 microsiemens, Mar. 3, 1979.

WATER TEMPERATURES: Maximum daily recorded, 32.0°C, June 28, 1978, July 14-18, 1980; minimum daily recorded, freezing point on many days during the winter period.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Flood of March 1913 reached a stage of 27.7 ft. Flood of Jan. 31, 1937, reached a stage of 24.4 ft.