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#1 Federal
Top of bedrock elevation surface derived from airborne electromagnetic survey data for Illinois and the Illinois River Basin, 2025
- Organization: Department of the Interior
- Dataset Last Updated: December 04, 2025 at 12:00 AM
In support of the U.S. Geological Survey (USGS) Illinois River Basin (IRB) Next Generation Water Observing System (NGWOS) program, a top of bedrock elevation surface was generated to improve...
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