
    (No. 6657
    Northern Illinois Gas Company, Claimant, vs. State of Illinois, Division of Waterways, Respondent.
    
      Opinion filed July 27, 1972.
    
    Northern Illinois Gas Company, Claimant, pro se.
    William J. Scott, Attorney General; Saul R. Wexler, Assistant Attorney General, for Respondent.
   Perlin, C.J.  