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LOCATION.-- Lat 39°30'20", long 90°59'00" (NAD of 1927), in NE1/4NW1/4 sec. 33, T. 6 S., R. 5 W., Pike County, Hydrologic Unit 07110004, at bridge on U. S. Highway 54, 0.4 mi downstream from Ambrosia Creek and 1 mi west of Atlas. |
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DRAINAGE AREA.-- 451 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1939 to September 1942. |
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GAGE.-- Wire-weight gage. Datum of gage is 434.85 ft above NGVD of 1929 (levels by Corps of Engineers, U. S. Army). Auxiliary inclined staff gage 6.3 mi downstream at datum 1.98 ft lower. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,800 ft3/s May 15, 1942; minimum discharge, 22 ft3/s Aug. 8, Sept. 1, 1941, but may have been lower during period of ice effect in 1939-40. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood in 1936 reached a stage of 14.5 ft, determined by Corps of Engineers, U. S. Army, from information by local resident. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |