Hydrogeology and ground-water availability in southwest McLean and southeast Tazewell Counties.

"Printed by authority of the State of Illinois/1998/950"--T.p. verso.

I-355 extension update.

Includes an annoucement that the Illinois Dept. of Transportation, in cooperation with the Illinois State Toll Highway Authority, will be performing additional studies in support of the extension of I-355 through Will County, Illinois.