Treptow-K Ã penick is a borough of Berlin , formed in 2001 by merging the former boroughs of Treptow and KÃ penick . Treptow-K Ã penick ( , with a silent w ) is the ninth borough of Berlin , formed in Berlin 's 2001 administrative reform by merging the former boroughs of Treptow and KÃ penick .