LOCATION.-- Lat 39°41'35", long 91°08'55" (NAD of 1927), in SE1/4NE1/4 sec.25, T.4 S., R.7 W., Pike County, Hydrologic Unit 07110004, on right bank at upstream side of bridge on State Highway 96, 0.8 mi southeast of Kinderhook, 2.0 mi upstream from Burlington Northern Railroad bridge, and at mile 6.6.

DRAINAGE AREA.-- 72.7 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1939 to September 1986.

REVISED RECORDS.-- WSP 1508: 1942, 1946, 1950.

GAGE.-- Water-stage recorder. Datum of gage is 467.55 ft above NGVD of 1929 (U.S. Army Corps of Engineers bench mark). Prior to Dec. 15, 1939, nonrecording gage, and Dec. 15, 1939, to Sept. 30, 1964, water-stage recorder at same site at datum 2.0 ft higher.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 15,000 ft³/s, Apr. 23, 1944, gage height, 13.91 ft; maximum gage height, 14.58 ft, Aug. 10, 1961; no flow for many days in many years.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Flood of Aug. 17, 1939, reached a stage of 15.93 ft, from floodmarks, discharge not determined.