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1  Flood Discharge Database

FEMA-published and selected other statistical flood discharge values, searchable by watershed or county.

2  Illinois Water Quality

EPA maintained website with links to all Illinois watershed water quality summary reports dating back to 1996.

3  MACKINAW RIVER AT COLFAX, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

4  MACKINAW RIVER BELOW CONGERVILLE, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

5  MACKINAW RIVER BELOW GREEN VALLEY, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

6  MACKINAW RIVER NEAR CONGERVILLE, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

7  MACKINAW RIVER NEAR GREEN VALLEY, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

8  MACKINAW RIVER NEAR HOPEDALE, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

9  MACKINAW RIVER NEAR KAPPA, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

10  MACKINAW RIVER NEAR MACKINAW, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

11  MACKINAW RIVER NEAR TREMONT, IL - Water Data

The USGS National Water Information System provides real-time and historical data on surface water flow, ground water levels, and water quality of streams in the US.

12  National Weather Service

Provides weather, water, and climate data, forecasts and warnings.

13  Provisional Monthly Flow Data

This site shows provisional, monthly mean flow data for 26 US Geological Survey gaging stations on rivers and streams throughout Illinois.

14  Rivergages.com: Water Levels of Rivers and Lakes

US Army Corps of Engineers maintained interface to easily access water level data for all Illinois Waterway measurement stations in tabular, graphical, or downloadable form. Divided by watershed.

15  Illinois River Basin GIS Data Viewer

Interactive map provided by the ISWS. Viewable layers include watersheds, rivers, water quality, geology, and groundwater.

16  Illinois River Watershed - Poster

Poster-sized (26x38) map of the entire Illinois River Watershed. Part of the Illinois State Water Survey published Map Series (2003-1)

Download Options: LoRes preview | HiRes (3.5 MB) | Metadata

17  Mackinaw Watershed Map

Thematic map of the Mackinaw watershed showing roads, county boundaries, and elevation changes.

Download Options: LoRes preview | HiRes (2.61 MB) | Metadata

18  Resource Management Mapping Service

Interactive map that allows users to locate, create, and print maps of large and small areas within Illinois. Natural resource, administrative, and economic layers available.

= Abstract available     = Full Text available     = Fact Sheet available
= PDF format     = HTML format     = PowerPoint format

19  A technique for evaluating algal growth potential in Illinois surface waters

Wang, Wun-Cheng, William T. Sullivan, and Ralph L. Evans, 1973 ISWS RI-72

20  Adequacy of Illinois surface water supply systems to meet future demands

McConkey Broeren, Sally, and Krishan P. Singh, 1989 ISWS CR-477

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