PROFESSIONAL EXECUTIVE PLT IN A C210 FORGOT TO PUT THE GEAR DOWN; DUE TO TFC WATCH DISTR; RESULTING IN RECOGNIZING IT IN TIME TO ADD PWR AND LIFT OFF THE RWY; PUT THE GEAR DOWN AND LAND ON THE REMAINING RWY. THE TWR INSTRUCTED HIM TO GO AROUND JUST AS HE WAS STARTING TO DO SO. THE ACFT RECEIVED DAMAGE TO THE PROP AND MINOR DAMAGE TO THE UNDER SIDE AND ANTENNA.

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I WAS RETURNING FROM A PERSONAL TRIP IN MY CESSNA 210 AND WAS APCHING THE ST LOUIS DOWNTOWN ARPT IN CAHOKIA; IL. THE APCH CTLR ADVISED ME THAT I WAS TO FOLLOW A CPR JET TO RWY 12R. THE REASON FOR MY INTEREST IN THE OTHER ACFT IS THAT IT IS THE ACFT I NORMALLY FLY FOR MY PROFESSION. I WAS LISTENING TO THEIR PROCS AND INSTRUCTION AND OBSERVING THEM WHILE ON APCH. I STARTED TO LOWER THE GEAR ON DOWNWIND AND REALIZED MY AIRSPD WAS A LITTLE EXCESSIVE; SO I DELAYED THE EXTENSION. ON FINAL APCH; FULL FLAPS WERE SELECTED. WHILE FLARING FOR A LNDG; I REALIZED I WAS SINKING TOO FAR. I APPLIED PWR; AND AT THE SAME TIME; THE TWR AT BI STATE ADVISED ME TO GO AROUND. AT THAT INSTANT; THE ACFT CAME INTO CONTACT WITH THE RWY. I HAD SUFFICIENT ROOM TO CLB ENOUGH TO LOWER THE LNDG GEAR AND LAND ON THE REMAINING RWY. I TAXIED SLOWLY TO THE END. THE ACFT HANDLED NORMALLY. DAMAGE WAS MINIMAL TO THE AIRFRAME. THE DME ANTENNA WAS SCRAPED AND THE AFT PORTION OF THE GEAR DOORS WERE SCRATCHED. THE PROP; HOWEVER; DID COME INTO CONTACT WITH THE RWY; REQUIRING FURTHER INSPECTION. PREVENTABLE? YES. PAY CLOSER ATTN TO YOUR OWN DUTIES AND CHK AND RECHK.