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Maps/GIS- 81 Stephenson County Orthophotography Data 1998-1999
- Illinois National Aerial Photography Program Digital Orthophotography quarter Quadrangle data for Stephenson County in the Universal Transverse Mercator (UTM) coordinate system with a NAD83 datum.
- 82 Whiteside County Orthophotography Data 1998-1999
- Illinois National Aerial Photography Program Digital Orthophotography quarter Quadrangle data for Whiteside County in the Universal Transverse Mercator (UTM) coordinate system with a NAD83 datum.
- 83 Winnebago County Orthophotography Data 1998-1999
- Illinois National Aerial Photography Program Digital Orthophotography quarter Quadrangle data for Winnebago County in the Universal Transverse Mercator (UTM) coordinate system with a NAD83 datum.






- 84 7-day 10-year low flows of streams in the Rock, Spoon, La Moine, and Kaskaskia regions
- Singh, Krishan P., Ganapathi S. Ramamurthy, and Il Won Seo, 1988 ISWS CR-440
- 85 Adequacy of Illinois surface water supply systems to meet future demands
- McConkey Broeren, Sally, and Krishan P. Singh, 1989 ISWS CR-477
- 86 An investigation of a volatile organic chemical plume in northern Winnebago County, Illinois
- Wehrmann, H. Allen, 1984 ISWS CR-346
- 87 An investigation of historical temperature and precipitation data at climate benchmark stations in Illinois
- Changnon, Stanley A., Jr., Derek Winstanley, and Kenneth E. Kunkel, 1997 ISWS C-184
- 88 Benchmark sediment monitoring program for Illinois streams : data report for water years 1994 and 1995.
- Allgire, Richard L., 2001 ISWS DCS 2001-01
- 89 Benchmark sediment monitoring program for Illinois streams : data report for Water Years 1996 and 1997.
- Allgire, Richard L., 2001 ISWS DCS 2001-02
- 90 Benchmark sediment monitoring program for Illinois streams : data report for Water Years 1998 and 1999
- Allgire, Richard L., 2002 ISWS DCS 2002-01
- 91 Benchmark sediment monitoring program for Illinois streams: data report for the water years 1992 and 1993
- Allgire, Richard L., 1997 ISWS C-183
- 92 Benchmark sediment monitoring program for Illinois streams: program summary and site descriptions.
- Allgire, Richard L., and Misganaw Demissie, 1995 ISWS C-181
- 93 CMAP Water Quality Management Plan Guidelines
- Chicago Metropolitan Agency for Planning (CMAP) information and guidelines for developing watershed action plans in Illinois.
- Northeastern Illinois Planning Commission (NIPC), 2002
- 94 CMAP Water Resources Planning
- Chicago Metropolitan Agency for Planning (CMAP) water resources planning website.
- Northeastern Illinois Planning Commission (NIPC), 2000 Short report detailing all water quality activites within the six-county metropolitian Chicago area.
- 95 Concentration and genera of algae in selected Illinois streams, 1971-1973
- Lin, Shun Dar, Ralph L. Evans, and Davis B. Beuscher, 1975 ISWS RI-80
- 96 Determination of stream width and elevation at selected gaging stations in Illinois for Soil Conservation Service wetland mapping
- Ramamurthy, Ganapathi S., Ming T. Lee, and Krishan P. Singh, 1989 ISWS CR-462
- 97 Diagnostic-feasibility study of Johnson Sauk Trail Lake
- Kothandaraman, Veerasamy, and Ralph L. Evans, 1983 ISWS CR-312
- 98 Diagnostic-feasibility study of Lake Le-Aqua-Na
- Kothandaraman, Veerasamy, and Ralph L. Evans, 1983 ISWS CR-313
- 99 Evaluation of hydraulic geometry parameters for various low-flow releases downstream of dams on Illinois streams
- Singh, Krishan P., 1981 ISWS CR-251
- 100 Hazardous wastes in Ogle and Winnebago Counties: potential risk via groundwater due to past and present activities
- Gibb, James P., Michael J. Barcelona, Susan C. Schock, and Mark W. Hampton, 1984 ISWS CR-336
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