LOCATION.-- Lat 41°22'10", long 88°10'24" (NAD of 1927), in NE1/4NE1/4SE1/4 sec.03, T.33 N., R.09 E., Will County, Hydrologic Unit 07120004, Midewin National Tallgrass Prairie, on left downstream side of highway bridge, 0.5 mi west of Interstate Highway 55, and at mile 4.4.

DRAINAGE AREA.-- 7.82 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

STAGE: October 2003 to September 2004.

PARTIAL RECORD: Miscellaneous discharge measurements, water year 2004.

GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 522.34 ft above NGVD of 1988.

EXTREMES FOR PERIOD OF RECORD.--

STAGE: Maximum recorded gage height, 6.46 ft, June 12, 2004; minimum recorded 1.31 ft, Aug. 3, 2004.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data