Narrative:

I was the PF. We were on an ILS to runway 9 at iah; visual conditions; and cleared to land. When we were approximately 3 or 4 mi from the runway; houston tower told us to watch for an E120 departing left to right in front of us. My first officer and I both spotted the aircraft as it began its takeoff roll on runway 15R. We both remarked out loud that if it got off the ground quickly; there cold be a problem. Sure enough; the brasilia rose rapidly. At about 500 ft AGL; I was forced to make a mild evasive maneuver; up and to the left; in order to avoid a collision. (I was still able to land on runway 9.) the encounter generated an audible TCASII TA alert. We later estimated that we'd passed about 300-400 ft from the brasilia. We don't know if the other crew ever saw us. As they deplaned; 3 of our passenger had comments and questions about the 'near miss.' this was an uncomfortable experience. If it is currently houston tower's policy to simultaneously land arrs on runway 9 while launching departures off runway 15L or runway 15R; I think the procedure should be reviewed immediately. If conditions had been slightly different (missed radio call; lighter brasilia; darkness; etc) it might have been much more difficult to avoid a collision.

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Original NASA ASRS Text

Title: CL65 ON ILS TO RWY 9 AT IAH WAS REQUIRED TO TAKE EVASIVE ACTION TO AVOID DEP FROM RWY 15R.

Narrative: I WAS THE PF. WE WERE ON AN ILS TO RWY 9 AT IAH; VISUAL CONDITIONS; AND CLRED TO LAND. WHEN WE WERE APPROX 3 OR 4 MI FROM THE RWY; HOUSTON TWR TOLD US TO WATCH FOR AN E120 DEPARTING L TO R IN FRONT OF US. MY FO AND I BOTH SPOTTED THE ACFT AS IT BEGAN ITS TKOF ROLL ON RWY 15R. WE BOTH REMARKED OUT LOUD THAT IF IT GOT OFF THE GND QUICKLY; THERE COLD BE A PROB. SURE ENOUGH; THE BRASILIA ROSE RAPIDLY. AT ABOUT 500 FT AGL; I WAS FORCED TO MAKE A MILD EVASIVE MANEUVER; UP AND TO THE L; IN ORDER TO AVOID A COLLISION. (I WAS STILL ABLE TO LAND ON RWY 9.) THE ENCOUNTER GENERATED AN AUDIBLE TCASII TA ALERT. WE LATER ESTIMATED THAT WE'D PASSED ABOUT 300-400 FT FROM THE BRASILIA. WE DON'T KNOW IF THE OTHER CREW EVER SAW US. AS THEY DEPLANED; 3 OF OUR PAX HAD COMMENTS AND QUESTIONS ABOUT THE 'NEAR MISS.' THIS WAS AN UNCOMFORTABLE EXPERIENCE. IF IT IS CURRENTLY HOUSTON TWR'S POLICY TO SIMULTANEOUSLY LAND ARRS ON RWY 9 WHILE LAUNCHING DEPS OFF RWY 15L OR RWY 15R; I THINK THE PROC SHOULD BE REVIEWED IMMEDIATELY. IF CONDITIONS HAD BEEN SLIGHTLY DIFFERENT (MISSED RADIO CALL; LIGHTER BRASILIA; DARKNESS; ETC) IT MIGHT HAVE BEEN MUCH MORE DIFFICULT TO AVOID A COLLISION.

Data retrieved from NASA's ASRS site as of January 2009 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.