Excerpt from The Water Resources of Illinois
The glacial deposits yield such an abundance of good water that over a large part of the State but few wells have gone below these deposits. Where the drift is thin, wells have entered the rock. In northern and western Illinois much prospecting for artesian water has been done.
The logs of wells are seldom sufficiently full or reliable to warrant publication, and the writer has had very little opportunity to examine well drillings. From many of the wells, however, information of more or less value has been Obtained which throws light upon the character and availability of such water.
No investigation of the water power of the streams has been under taken further than the collocation of results obtained by others; but the use of streams as sources for city water supply has been investi gated, and analyses of waters from this source, as well as from other sources, have been obtained.
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