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LOCATION.-- Lat 41°55'46", long 87°50'40" (NAD of 1927), in NW1/4SW1/4 sec. 26, T. 40 N., R. 12 E., Cook County, Hydrologic Unit 07120004, on downstream side of Grand Avenue bridge in River Grove, and at mile 55.1. |
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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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PARTIAL RECORD: Annual maximum, water years 1960 to 1977. |
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GAGE.-- Crest-stage gage. Datum is 612.93 ft above NGVD of 1929 (612.64 ft NAVD 1988). |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3620 ft3/sec, April 2, 1960 and June 11, 1967, gage height, 7.58 ft. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |