| Location: | LAT. 38-58-05, LONG. 90-25-44. TWO TENTHS OF A MILE DOWNSTREAM FROM THE MOUTH OF THE ILLINOIS RIVER, AND 218.0 MILES ABOVE THE MOUTH OF THE OHIO RIVER. |
| Gage: | STAFF GAGE G.O.E.S. TELEMETERED DATA COLLECTION PLATFORM WITH PRESSURE TRANSDUCER. OWNED & OPERATED BY ST. LOUIS DISTRICT, CORPS OF ENGINEERS. MAINTAINED IN COOPERATION WITH THE US GEOLOGICAL SURVEY. TELEMARK GAGE MAINTAINED BY NATIONAL WEATHER SERVICE. |
| General Information: | FLOOD STAGE, 18 FEET. DRAINAGE AREA, 171,300 SQUARE MILES. NOTE: LOCK & DAM 26 (REPLACED BY MELVIN PRICE LOCK & DAM) REACHED MAXIMUM REGULATED POOL (419.0 FEET NGVD) ON AUG 08, 1938. MELVIN PRICE LOCK AND DAM REACHED MAXIMUM REGULATED POOL (419.0 FEET NGVD) ON 01 FEB 1990. |
| Records Available: | STAGE, AUG. 1879 THRU SEPT. 1892. APR 1894 TO DEC 1904; CONSECUTIVE STAGE RECORDS BEGIN 1929 TO DATE. (ALSO AVAILABLE IN REPORTS OF THE NATIONAL WEATHER SERVICE). DISCHARGE, INTERMITTENTLY FROM 1880 TO 1934. COMPUTED DAILY, 1928 TO 1932. |
| Mean Stage: | PERIOD OF RECORD, 14.04 FT . 01 JAN 1991 TO DATE, 16.74 FT . |
| Extreme Stage: | PERIOD OF RECORD, DAILY HIGH OF 38.01 FT ON 01 AUG 1993 & PERIOD OF RECORD, DAILY LOW OF -1.00 FT ON 11 DEC 1937 . 01 JAN 1991 TO DATE, DAILY LOW OF 14.15 FT ON 07 DEC 1993 . |
| Zero Gage Datum: | 403.79 ft NGVD 29 NOTE: ADD DATUM TO STAGE TO OBTAIN ELEVATION. |
ALL VALUES RECORDED AT 8AM. STAGE IN FT: