LOCATION.--Lat 39°49'04", long 90°39'16" (NAD of 1983), in SW1/4NE1/4 sec. 8, T.3 S., R. 2 W, Pike County, Hydrologic Unit 07130011, on right bank at upstream side of bridge on State Highway 104 at east side of Chambersburg, 3.8 miles downstream from Leineke Branch, 5.5 miles upstream from South Fork McKee Creek, and at mile 7.1.

DRAINAGE AREA.--341 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: August 2002 to current year.

STAGE: August 2002 to current year.

SURFACE-WATER QUALITY

CHEMICAL: WATER YEARS 1979-87.

SEDIMENT: October 2002 to current year.

MISCELLANEOUS: Sediment concentration and particle size, water years 2002-03.

GAGE.--Water-stage recorder, phone telemeter, automatic water sampler, and crest-stage-gage. Datum of gage is 400.00 ft above NGVD of 1929 (established by Illinois Dept. of Transportation).

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 9,420 ft³/s, September 1, 2003, gage height, 42.01 ft; Minimum discharge, 3.9 ft³/s, October 16, 2002.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,040 mg/L, May 25, 2004; minimum daily, 15 mg/L, Oct. 18-24, 2003.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 66,700 tons, Aug. 26, 2004; minimum daily, 0.48 tons, Dec. 2, 2002.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Flood of June 2002 exceeded the measured discharge of 12,100 ft³/s on June 13, 2002, gage height not determined.