LOCATION.-- Lat 42°23'16", long 88°23'24" (NAD of 1927), in SW1/4SW1/4 sec. 11, T. 45 N., R. 7 E., McHenry County, Hydrologic Unit 07120006, at bridge on Greenwood Road, at south edge of Greenwood.

DRAINAGE AREA.-- 83.2 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

PARTIAL RECORD: Annual maximum, water years 1978 to 1979.

GAGE.-- Crest-stage gage. Datum is 819.78 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 768 ft³/sec, March 19, 1979, gage height, 0.68 ft.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data