LOCATION.-- Lat 41°27'40", long 90°30'00" in sec. 16 (NAD of 1927), T. 17 N.,R.1 W., Rock Island County, Hydrologic Unit 07090005, at bridge on U.S. Highway 150, 2 mi southeast of Moline, 3 mi upstream from Mill Creek and 7 mi upstream from the mouth. Gage is in pool of resevoir. | |
DRAINAGE AREA.-- 10,800 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: October 1939 to September 1940. | |
STAGE: Gage height records collected at same site since 1929 are contained in reports of U.S. Weather Bureau. | |
GAGE.-- Water-stage recorder. Datum of gage 551.34 feet above NGVD of 1929 (levels by Corps of Engineers). | |
REMARKS.-- Daily figures are computed flows based on summation of ungaged flow and records for stations at Joslin, Green River near Geneseo and Illinois-Mississippi Canal, and adjusted for change in channel storage above station. Ungaged flow computed on basis of drainage area of 270 mi2 and unit run-off indicated by records for Mill Creek at Milan. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum daily discharge 15,900 ft3/s Aug.30; maximum gage height 10.31 ft Aug.30; minimum daily discharge, 882 ft3/s Jan. 3 (due to rapid accumulation of ice storage); minimum gage geight 6.78 ft Sept. 21. | |