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The Importance of Ground Water in the Great Lakes Region
Water Resources Investigations Report 00 - 4008

Figure 6

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 [Map: Figure 6 - Decline in water levels]

Figure 6. Decline in water levels in the sandstone confined aquifer, Chicago and Milwaukee areas, 1864-1980. (Modified from Avery, 1995.)

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Page Last Modified: Thursday, 03-Jan-2013 20:13:15 EST