| Location: | LAT. 39-15-28, LONG. 90-43-41, ON LEFT BANK, AT MILE 260.3 ABOVE THE MOUTH OF THE OHIO RIVER. |
| Gage: | G.O.E.S. TELEMETERED DATA COLLECTION PLATFORM WITH PRESSURE TRANSDUCER. OWNED, OPERATED AND MAINTAINED BY ST. LOUIS DISTRICT, CORPS OF ENGINEERS. DIGITAL RECORDER INSTALLED, JULY 3, 1974. |
| General Information: | FLOOD ELEVATION 441 FEET NGVD. DRAINAGE AREA, 141,500 SQUARE MILES. NOTE: LOCK & DAM 25 REACHED MAXIMUM REGULATING POOL (434.0 FEET NGVD.) ON JULY 11, 1939. |
| Records Available: | STAGE, AUG. 1939 TO DATE, IN FILES OF CORPS OF ENGINEERS. GAGE FORMERLY AT HAMBURG, IL, MILE 258.4, AT THE SAME DATUM. |
| Mean Elev: | PERIOD OF RECORD, 436.45 FT . 01 JAN 1940 TO DATE, 436.46 FT . |
| Extreme Elev: | PERIOD OF RECORD, DAILY HIGH OF 454.30 FT (ESTIMATED) ON 29 JUL 1993 & PERIOD OF RECORD, DAILY LOW OF 428.20 FT OCCURRING ON MULTIPLE DATES WITH THE MOST RECENT ON 27 FEB 1950 . |
| Zero Gage Datum: | 400.00 ft NGVD 29 NOTE: SUBTRACT DATUM FROM ELEVATION TO OBTAIN STAGE. |
ALL VALUES RECORDED AT 8AM. ELEVATION IN FT: