LOCATION.--Lat 41°21'17", long 88°10'20" (NAD of 1927), in NW 1/4 SW 1/4 sec. 11, T.33N, R.09 E, Will County, Hydrologic Unit 07120001, Midewin National Tallgrass Prairie, on right upstream side of bridge, 1.05 mi. from Interstate 55, and at mile 1.3.

DRAINAGE AREA.--48.60 mi².

PERIOD OF RECORD.--

SURFACE WATER DISCHARGE AND STAGE

STAGE: October 2003 to September 2004.

PARTIAL RECORD: Discharge measurements, water year 2004.

GAGE.--Water stage recorder and crest stage gage. Datum of gage is 530.91 ft. above NAVD of 1988.

EXTREMES FOR PERIOD OF RECORD.--

STAGE: Maximum recorded gage height, 7.57 ft., June 13, 2004; minimum recorded, 1.31 ft., Aug. 16, 17, 2004.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data