EXPERIMENTAL BIPLANE; TAIL DRAGGER TAXIES INTO BARRICADE.

Narrative

I LANDED AND TURNED DOWN THE TAXIWAY 4/5 THE WAY DOWN RWY 33. THIS TAXIWAY LEADS TO A RAMP AREA IN FRONT OF AN FBO BUILDING; TURNS 45 DEG TO THE NW AND SLIGHTLY UPHILL PAST T-HANGARS AND THEN BACK AROUND TO THE OTHER END OF THE RWY; OR; THE APCH END OF RWY 15. NOT KNOWING THE SMA'S INTENTIONS; I DECIDED TO FOLLOW THE TAXIWAY TO THE OTHER END OF THE RWY TO STAY OUT OF HIS WAY. THIS WOULD ALSO AFFORD ME THE OPPORTUNITY TO SEE IF A FRIEND; WHO BASES HIS PLANE AT OQW WAS AT HIS HANGAR. MY AIRPLANE IS A TAIL DRAGGER BIPLANE SOLOED FROM THE REAR SEAT. AS WITH ALL TAIL DRAGGERS; THE FORWARD VISIBILITY IS NOT GREAT AND S- TURNS MUST BE EXECUTED ON THE GND FOR FORWARD VISIBILITY. SINCE THE TAXIWAY WAS NARROW; MY S-TURNS WERE SHALLOW. TO MAKE MATTERS WORSE; AT THIS TIME OF THE DAY THE SUN WAS LOW ON THE HORIZON AND HAD A SOMEWHAT BLINDING EFFECT. I WAS WEARING SUNGLASSES AT THE TIME. AS I APCHED THE AREA IN FRONT OF THE T-HANGARS; I HEARD A LARGE BANG; FELT A TERRIFIC VIBRATION THROUGH THE AIRFRAME AND SAW A BLUR OF WHITE MATERIAL THROWN ON EITHER SIDE OF THE AIRPLANE. I IMMEDIATELY KILLED THE ENG. TO MY AMAZEMENT AND DISMAY; I SAW PIECES OF A ROAD CONSTRUCTION TYPE BARRICADE CUT IN 2 BY MY PROP. ITS HVY ANGLE IRON AND PLYWOOD CONSTRUCTION BENT ONE PROP TIP AND CUT A 3/4 INCH DEEP BY 1/2 INCH WIDE GASH 6 INCHES FROM THE OTHER TIP. AFTER COMPLETELY SHUTTING DOWN THE AIRPLANE AND INSPECTING IT FOR ANY OTHER DAMAGE (THERE WAS NONE); I WALKED TO THE UNATTENDED FBO BUILDING AND CALLED THE OQW ARPT MGR. I INFORMED HIM OF THE SITUATION AND MY MISFORTUNE. HE TOLD ME THAT MAQUOKETA CITY WORKERS; THAT AFTERNOON; HAD SEAL-COATED WITH TAR AND PEA GRAVEL THE RAMP AREA IN FRONT OF THE T- HANGARS. THE ROAD BARRICADES WERE PLACED AT EACH OF THE RAMP ENTRANCES; AT HIS INSISTENCE; TO IRONICALLY PREVENT PROPS FROM BEING NICKED AND DINGED BY LOOSE GRAVEL. HE ARRIVED AT THE ARPT WITHIN 1 1/2 HRS TO ASSESS THE SITUATION AND OPEN A HANGAR FOR ME TO STORE THE AIRPLANE UNTIL I COULD GET A REPLACEMENT PROP. WHILE I WAITED FOR HIM TO ARRIVE AT THE ARPT; I CALLED THE FT DODGE FSS TO CHK IF ANY NOTAMS HAD BEEN FILED AT OQW REGARDING THE CLOSED TAXIWAY. THEY RPTED NO NOTAMS WERE ON FILE FOR OQW.