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LOCATION.-- Lat 40°28'16", long 89°01'48" (NAD of 1927), in NE1/4NW1/4 sec.7, T.23 N., R.2 E., McLean County, Hydrologic Unit 07130009, on left bank at Bloomington-Normal Sanitary District sewage-treatment plant, 250 ft upstream from bridge on Interstate 74, 0.4 mi west of Bloomington, and at mile 48.8. |
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DRAINAGE AREA.-- 34.4 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: October 1974 to current year. |
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STAGE: Water years 1994 to current year. |
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REVISED RECORDS.-- WDR IL-82-2: Drainage area. WDR IL-87-2: 1985. |
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GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 725.11 ft above NGVD of 1929. Prior to Nov. 4, 1987, 200 ft upstream at same datum. |
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REMARKS.-- Sewage-treatment plant effluent 300 ft upstream contains publicly supplied water from Lake Bloomington and Lake Evergreen and ground-water sources. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,600 ft3/s, Dec. 3, 1982, gage height, 14.02 ft, from floodmark; minimum daily, 9.0 ft3/s, Dec. 25, 1976. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |