LOCATION.-- Lat 41°13'11", long 87°58'39" (NAD of 1983), in SE1/4SE1/4 sec.29, T.32 N., R.11 E., Kankakee County, Hydrologic Unit 07120001, at downstream side of bridge on county road, 2.0 mi south of Deselm, and at mile 2.5.

DRAINAGE AREA.-- 118.8 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

PARTIAL RECORD: Miscellaneous low-flow discharge measurements, June 1970 to December 1972.

BIOLOGICAL

BENTHIC MACROINVERTEBRATES: Water year 2005.

GAGE.-- Nonrecording gage. Gage datum undetermined.

REMARKS.-- Biology station established in 2005 as part of a comparative study of the National Water-Quality Assessment (NAWQA) program and the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP) invertabrate sampling techniques.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Minimum measured discharge, 3.86 ft³/s, Sept. 16, 1971, gage height unknown.

REMARKS FOR CURRENT YEAR.--Benthic macroinvertebrate community samples were collected as part of a comparability study for the National Water-Quality Assessment program (NAWQA) in the upper Illinois River Basin. One quantitative sample and one qualitative multihabitat sample were collected in accordance with the NAWQA protocols (Cuffney and others, 1993). A Slack sampler was used to collect five subsamples from coarse-grained substrates in flowing water. The sampler had a sampling area of 0.25 m² and was fitted with a 500 µm mesh net. All samples were processed by the USGS National Water-Quality Laboratory. Phylum, Class, Order, Suborder, Family, Subfamily, and Tribe are listed and arranged according to the USGS National Water-Quality Laboratory taxonomic hierarchy. The reach was located at the CR5000N bridge crossing south of Deselm. The surface area sampled was 1.25 m².