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Watershed > Illinois River Valley
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Data Online- 1 7-Day 10-Year Low Flow Maps
- These maps provide information on low flow conditions that might be expected to occur only during droughts (once in 10 years), and associated effluent discharges, water withdrawals, and flow regulations for most Illinois rivers and streams.
- 2 Adams County 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.
- 3 Agricultural Research Service (ARS) Water Data Base
- Collection of precipitation and streamflow data from small agricultural watersheds - Illinois locations: Elmwood, Edwardsville, Monticello.
- 4 Bridge Guide Clearances
- Table listing navigational clearances established by the Coast Guard. Contains waterway name, bridge type, horizontal and vertical clearance, and reference plane.
- 5 Brown County 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 Bureau County 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 Calhoun County 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 Cass County 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 Census 2010 Analysis for Northeastern Illinois
- Link to the Chicago Metropolitan Agency for Planning (CMAP) regional demographic analysis of Census 2010 results.
- 10 Corps Locks
- The Corps Locks website contains lock and vessel specific information derived from the United States Army Corps of Engineers Lock Performance Monitoring System (LPMS).
- 11 Dams and Obstructions in the Chicago area
- Webpage maintained by the Chicago Area Paddling/Fish Guide with tables listing dams’ names, cities river mile locations, GPS positions, dam heights, and pictures for visual reference.
- 12 Flood Discharge Database
- FEMA-published and selected other statistical flood discharge values, searchable by watershed or county.
- 13 Ford County 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.
- 14 Fulton County 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.
- 15 Greene County 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.
- 16 Grundy County 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.
- 17 Hydrologic Units of Illinois
- This map provides the USGS level 8 Hydrologic Unit Codes (HUC 8s) for Illinois watersheds.
- 18 ILLINOIS RIVER AB MARSEILLES DAM AT MARSEILLES, 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.
- 19 ILLINOIS RIVER AT BEARDSTOWN, 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.
- 20 ILLINOIS RIVER AT CHILLICOTHE, 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.
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