LOCATION.-- Lat 41°01'35", long 89°26'20" (NAD of 1927), in SE1/4NW1/4 sec.14, T.12 N., R.9 E., Marshall County, Hydrologic Unit 07130001, on left bank 120 ft upstream from bridge on State Highway 29 and 200 ft upstream from Rock Island Railroad bridge in Sparland.

DRAINAGE AREA.-- 5.42 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1945 to September 1947, October 1949 to September 1971.

REVISED RECORDS.-- WSP 2115: 1946-47(M), 1950-52(M), 1954(M), 1958(M), 1964-65(M).

GAGE.-- Water-stage recorder. Concrete control since Oct. 1, 1949. Datum of gage is 545.55 ft above NGVD of 1929. Prior to June 21, 1946, nonrecording gage at site 120 ft downstream at same datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 2,650 ft³/s July 2, 1958, gage height 8.45 ft, from rating curve extended above 220 ft³/s on basis of slope-area measurement at gage height 4.99 ft; no flow at times each year.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum stage known, about 10 ft on Aug. 20, 1924 (from information by local resident).