SMA ON PIPELINE PATROL HAD LTSS FROM ACR ACFT ON APCH TO MULTIPLE RWY OP INTERSECTING RWYS.

Narrative

WHILE ON ROUTINE PIPELINE PATROL I ENTERED BWI CLASS B SURFACE AREA WITH CTLR'S CONSENT. I WAS GIVEN SQUAWK CODE AND IDENTED. MY RTE TAKES ME APPROX 1 MI N OF BWI ARPT OFF THE APCH END OF RWY 15R AND 15L. THE CTLR CALLED TFC ARRIVING RWY 10 AND I CONFIRMED VISUAL AND SEPARATION. AS I PASSED RWY 15R I SAW UNDER AND TO MY R A COMMUTER ACFT WHICH APPEARED TO BE LNDG ON RWY 15R. THE CTLR DID NOT CALL TFC AND DUE TO MY MANEUVERING I DID NOT SEE THE ACFT UNTIL IT HAD PASSED ME. I WAS HANDED OFF TO ANOTHER CTLR; AND ALL I HEARD WAS THE COMMUTER PLT ASKING IF ANYONE WAS TALKING TO ME. I CHKED IN AND WAS CLRED ON MY RTE. I LATER FOUND OUT THE COMMUTER PLT FILED A NEAR MISS RPT WITH THE TWR. I DO NOT FEEL THE FAULT IS WITH ME; HOWEVER; I WILL NOT TAKE A CHANCE. I FEEL IT WAS CTLR ERROR BUT IF I COULD HAVE KNOWN IN ADVANCE OF THE USE OF RWY 15R I WOULD HAVE BEEN MORE ALERT. I WAS VERY PREOCCUPIED WITH AVOIDING TFC AND FOLLOWING THE PIPELINE I FEEL I WAS MAXED OUT IN WORKLOAD. IN MY ESTIMATION THE 2 ACFT CAME WITHIN 100-200 FT OF EACH OTHER. AT THE ALT AND POS OF THE 2 ACFT NO EVASIVE ACTION COULD BE TAKEN DUE TO THE PROX OF THE GND AND THE ACFT SPDS AND CONFIGN.