consideration to the sea gull problem as a *375 danger to aircraft in recommending denial of the landfill permit. The United States Government originally filed its representation of interest in this suit alleging a hazard to air operations at the Glenview Naval Air Station. However, on November 1, 1966, the United States Government withdrew its motion to intervene and its representation of interest. Since the only hazard to aviation alleged was that in respect to Glenview Naval Air Station, we may assume that this was the only known hazard, that the United States Government had investigated its interest in the matter and had withdrawn its representation of interest and that it is satisfied that there is no longer a serious issue.
[3] In respect to traffic problems, Leo J.Wilkie, the head of the Traffic Engineering Division of the Cook County Highway Department testified that Willow Road, the planned access road, is elevated over the railroad and truck drivers leaving the site would be unable to see fast moving traffic from the west. He also said the four percent grade of the railroad bridge presented an ice problem. Plaintiffs presented Mr. Paul Box, a consulting traffic engineer with an impressive background of experience and national recognition who testified that the additional truck movements considering the time of day of such movements would be absolutely insignificant, and would have no effect whatsoever on the traffic capacity of the route. The witness based his conclusions as to traffic flow in part on a landfill site in the metropolitan area