LOCATION.-- Lat 41°35'48", long 87°39'59" (NAD of 1927), in SE1/4NW1/4 sec. 19, T. 36 N., R. 14 E., Cook County, Hydrologic Unit 07120003, at bridge on the Dixie Highway at Markham.

DRAINAGE AREA.-- 12.6 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

PARTIAL RECORD: Annual maximum, water years 1961 to 1976.

GAGE.-- Crest-stage gage. Datum is 603.54 ft above NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 502 ft³/sec, August 17, 1968, gage height, 6.98 ft.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data