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(National Stream-Quality Accounting Network Station)
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LOCATION.-- Lat 37°12'11", long 89°02'30" (NAD of 1927), Pulaski County, Hydrologic Unit 05140206, at auxiliary gaging station, 0.5 mi upstream from Gar Creek, 3.0 mi southwest of Grand Chain, IL, 18.1 mi downstream from gaging station at Metropolis, and at mile 962.2. |
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DRAINAGE AREA.-- 203,100 mi2, approximately. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1955 to current year. |
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SPECIFIC CONDUCTANCE: October 1954 to September 1970, January 1973 to September 1990. |
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WATER TEMPERATURE: October 1954 to September 1970, January 1973 to September 1990. |
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REMARKS.-- Records of daily discharge are available for station at Metropolis, IL, (station 03611500). Flow regulated by many dams and reservoirs. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SPECIFIC CONDUCTANCE: Maximum daily recorded, 693 microsiemens, Nov. 25, 1968; minimum daily recorded, 170 microsiemens, Feb. 9, 1957. |
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WATER TEMPERATURE: Maximum daily recorded, 31.0°C, July 15, 1964, July 17-21, 25, 1977; minimum daily recorded, 0.0°C, on several days during most winter months. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |