Narrative:

I had just assumed the local control position when I observed an unknown target on the radar level at 7;500 feet northbound cut through the eastern edge of our airspace. I transmitted in the blind in an attempt to reach out to the pilot; but was not able to. He exited to the north to an unknown destination. No traffic was affected.this is a persistent problem at bjc; with incidents appearing to be on the rise. We have a VFR corridor that is located on the extreme eastern edge of the airspace with a ceiling of 7;500 feet. The biggest issue this creates is the IFR aircraft are supposed to be at 7;000 feet the final for 30R; but sometimes they will be slightly higher. When we are on runway 12L; the departures are put right in the face of any aircraft flying this corridor. The safety issue here is obvious. Something needs to be done about this.

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Original NASA ASRS Text

Title: A Tower Local Controller reported an aircraft fly through the airspace without making contact.

Narrative: I had just assumed the Local control position when I observed an unknown target on the radar level at 7;500 feet northbound cut through the eastern edge of our airspace. I transmitted in the blind in an attempt to reach out to the pilot; but was not able to. He exited to the north to an unknown destination. No traffic was affected.This is a persistent problem at BJC; with incidents appearing to be on the rise. We have a VFR corridor that is located on the extreme eastern edge of the airspace with a ceiling of 7;500 feet. The biggest issue this creates is the IFR aircraft are supposed to be at 7;000 feet the final for 30R; but sometimes they will be slightly higher. When we are on Runway 12L; the departures are put right in the face of any aircraft flying this corridor. The safety issue here is obvious. Something needs to be done about this.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.