Clear Lake Quadrangle
NOTE: This is not the actual topographic map! This image depicts the area covered by the topographic map and identifies the surrounding maps. If you have additional questions contact the Information Office or call 217-244-2414.
Please note: There is a very small piece of the Clear Lake quad in Schuyler County. You may choose not to order this quad if Schuyler County is the area of interest.
County: Cass, Mason, Schuyler
Current Date: 1981
Photo Revision Date:
Archive Date: 1981
Ordering information for Illinois State Geological Survey Publications
Updated 01/05/2010 SLD